WESCOM.INC.Circuit Description!Installation Series

Section 405-101/3Equipment Issue 3

Second Printing, August 1916

405 Combination Pickup Relay and Station Circuit

CONTENTS

1. GENERAL ••

2. APPLICATIONS

3. CIRCUIT DESCRIPTION

4. 1NSPECTI ON

5. MOUNTING.

6. INSTALLER CONNECTIONS.

1. OPTIONS. •

8. TESTING •

9. WARRANTY

10. SPECIFICATIONS

1. GENERAI.

PAGE

. • 1

1

5

. 1

1

1

8

9

9

. • .10Figure 1. 405 Combination Pickup Relay and

Station Circuit

2. APPLICATIONS

1.01 This Practice provides circuit description,installation procedures, and basic testing

information for the Wescom® 405 CombinationPickup Relay and Station Circuit (Figure 1).This Practice has been reprinted to include appli­cations information and a general editorial update.

1.02 The 405 is a plug-in, printed circuit boardmodule used for talk battery, dialing con­

trol, push-to-talk operation, and access to the4-wire line fram a 4-wire station set.

2.01 The 405 provides a pickup relay circuitand a 4-wire station circuit. It is always

use<:! at the station end of a circuit in conjunctionwith a 4-wire private line telephone or a 2-wire/4-wire key telephone set similar to the Wescom8640 Telephone Set or the Wescom 8642 Tele­phone Set, respectively. The 405 is normally used

, with a Wescom 401 4-Wire line Amplifier and aWescom 402 4-Wire line Termination Circuit andany associated signal ing equipment (V F, 55-1 A,ringdown, etc.). Typical applications of the 405are shown in Figures 2, 3, and 4.

~1972WESCOM. INC.Revised e'976

Ali rights reserved.Printed in United States of America.

Section 405·101/3

REFERTOFIGURE 5.

Tt)4-WIRE

STATION

405( IClI-150.nl "Tl~

~...~ _41

..-RT 133.." 1~ Mn "".51 RT'-.~RR .... ... 1 1 ..n ':'49 Rit39_

~TT ...lTTl5 TT1 3ml ... ....

2 ~TR il!l::' '" 1 ...4 P:....!::lIer::: ~ TR';,."-

~lTll 'fljfJ • .20-~

154.... ... t• .24

130•• • .2512 • , f'" • ,32

..-5 121,,<UllI ...1 "LUIII'7 s .."-

~oo:.--,,. (ILUetII

29"LDIll f CL .cu46

31.......... 1 (1'" ,.55

4. • .r1 ... t.....53

1. • ... ••25

38... ,~ .... 4

i:5'7I1.nl11 '"1''': • "'... 43 FW..+ -14V

IA~27.......' • ,.. 19

·QiJ-I~--,

~ICI o. ~ ....9403 A 13- .... T •. ...l".;,;26 PT..

..,,40 45 7 ~ 2A~

L~....34 -b ~

~RT 42,"" r ,0,.52 RT r~RR 36_LI_l ! ...."""";...,28 RR -24V2

~TT 48.m .... ITTl4G TTN. TR 5OlT.,

u.. .... ","":,,.,44 TR1 :S 30........ n UMI32 S....11811LUO' ..... Il LUllI 20

10....... .... ..'.24

la.ou ...... -J ,",14

38 ..... 26

22 .... 16.... ....12 FW-uy 0156.c. lAI5" 2A

4 ......'~.... 1:1

r· • l2,+-24V

4038 EI-IOTl39

[- ....,n

RT !'lllllTl 1 1IlT151 RT

:t: :RR 1,,-'1_ .... -r... ~(.lID27. RRTT 47,", ... 'TT,4~ TT

,Hl; TR 49lTOI .- -lTllI43 TR-1;s 29" ..... ... a ....... 31 S

1711UM1 ... Il ....,19

Ig.. UMI ... ,",,23

l7lf1U ... + -J ,,,,,1:'1

Ln .... 25

121 ... l!l... ....11 FW....lM",. •..5'" 3A

-24V~ l3......, ~T· •--'-

Y.~E4~51GNAU

EOlJlPMEAND 40

UNE NaTO 40

SIGNAl..INGEQUIPMEHT.AND 401

L1NENo.T040~51GN

EOUIP~AND 40

Figure 2. Station Access to Three Unes Using One 405 and One 403

Page 2

Section 405·101/3

REFERTOFIGURES.

REFERTOFIGURES.

TO 4-W/RE

STAnON

NO. 2

1'04-W1M:

STATIOI'tNO. 1

405( 10-:10". .~~

Iow.. L..h _41RT~'RT 33_ ~ 1'+0 ... ...s

RR .~ - ~ 1 ... - RR~_4: TT-

)om "' .. "' ".5 tT~

:TR &;: ... 1 .. 4~_ .-m::-o;:: TR~,M ... Il 4f-'

O~,..- '" 1 124-

~.. ..~1 . t ... • .32

15 li ..... ...~ fna..17 S.........

~- .. ..... 1

~s~ t CL lCu46

~~..~.: :'0 (J- "::D403" 0- ~- ...:..J@l .... 4

.,,4Q 15T~ ....... 1 .. ......... 43 fW~....1- f -~~

lu.....,.m ...." IA~

i:lz"'~-~""97'

r42..... .... 52

'RR 13&._ .... 1--...,2" TT' . "'f-,Zl PTTT ....... - 1T'T14&

45 7..,-<l--<>-J~

TR 150.... ...~T..44

_"f. * r....s 1~1I~ .... .....32 -24V

1....... .... • ....20

110...... .... ....2

18....----.

..... ~ ,",1....138 ..... 26

zz ~-~.... ...12 405l 10-_'ft ~l'a ..~156.., ...54~... '--h _41

4 ......01

~-:1:1

[,li... Ll'h ... ..,!li RT,~9=

... il ... =4! RR~1

"'~"'.. "' ..~5 Ti~- ~"'! .. c, ..... .!J:~ 0;:: TR~

-24V i:l6..11 1 1 c,~,

.~1:14_ '" 1 124

00•• ••2~

12. . T- • .SI

12I ••I.I.lIOI ",,1 .. t.UDi 17 2..... .. ..... 1fË! 1 • '0."' n---1...., lI'U ~ 1 .55

41,.' .. 1-~~_"" 1123

4038 0- ;,8,.. .~.Jil _4

__ . _.__ .s.!.!1! :,rlh.rllOlfIU l···~ .. ", ... 43 FW~....,14 ~---k r -~ 27~.O',,'" lAI 19

L;j,.j -...~41(111'1 ~ ,,",502KI e- ~ .......ri'

'35_ ....!~~PtIll27 TT' . '10-26 PT..

45 7"'-<+-<>-'

~411Tn ... ctT1451.... - ±49fT1a ~_._~ ITM43

-l4V - r29u~_ .._~ lIu.1lOt31

17uu.tlOt ": .-.!!~~

~~.-_~ ~23p!!!':.L____~ ~~3_

~------".:"-----~~ll! _o. _-'::!-____ .._.!5PVe f,~t 1.,.... --- --_._-_.

-24V-~~;:~:-tf!f..!~._- u u

LINE NO.2

SIJ~?~&EQUIPMENT.

AND40f

L1NE NQI1'0402,

SlGNALlNGEQUIPYENT.

AND 401

,,-

Figure 3. Two Station Access to Two Lines Using Two 405's and One 403

Page 3

Section4Q5·101/3

TO55-lA

40~( )CJ~ ...50 lU!lT~ ItTl36

~OPTIOIW.~l-h ''''14

RT ~3,"" Lllh Ma "".51 ' RT ...RR ~9;;

...~ 1 Ma =4~ RR~

TT 3fTn "U...

lT"~ TT:'"TR t5:= "" 1 .. li i-/....L1!h '::; ~ TR~

~I Ljt-! 1 .20,

.54llltll "~~, . , .25

4760 CI-ISS' 1 21 • t ... , .12

.RT 26 ,""24 1 2111UADI ... ~ Ill,LlOII7

~RR 32

_ __28 128 (fIC) ,. tll.PDl1

~TT 36 _ ,,"Ig29nl.uot 1 CL Icu46

,TR 22 t 'T0I20 TO STATION [ RLI ~I,..........1 ;1'"' 1 .~5~I 12...... riLiAO U S1GNALlN6 CIRCUIT

OPTlfNAL, - .-9(409 SECTION) 41 1 ~t I! (lM ,e- 1 153

150".-. LI *........IA OR \l,. ...... , .23 OR"2

ON~, -ô[ill 38,,,, :-$ PI 47-24Y •• UN>

2 3742L1Aa1 l'U 1 QI FW ......-Il wall; •,,,.... 43....

A(-Ô(ffi 21"",.... • IA)t9BT 14,....

,,,,,34 ~.~,

'BT 0ClI 52«:1 0.. ~ flm944......

,LOR 1..... "'" ,...30 ·a411 T • 1.... 26 PT ...45 7 ~

~0ClI lTT,3~as 6_

-!-... ·lK;ï.m3a

.t:',lœ -l4\'L.... r----, sc. ~ '0 wa40

156_ Il sc. r:~42405( ICJ~ ...PS 50 ISS J

'" ,,"3:1

~~R 155......1

~ ,... 41

12Ul 1 f-~ ~''''' Ulh "".51• OR RT. Ma

~C&

I~~ ~::JRR 139'1::

... + 1....

RR~7"", "n rMI49:r.Ar.l 1...... TT 3fTT) lI\l

...TT~.... IHI~

~CAB 13_

,~"'t!rTR 1151~ .... 1 "!~~...~'::;~ TR~

)CB 49_ ~6 cie ~I Ljt-! , 120,

~CBG 151_ b4.... "'~~CBB ~3_ .1 @)Ci' .r;,.... ~I bo, 1 , 125, . 35....", 17_ t ... 1 .322 , •

-2t "* 1 2IuLlIlDt ... ~ Il lhOlIl

280ci ra Ul,.foIOII 1

STIflON ~29ISl..lADI t CI. fcu46

SI6N L1N6 RL 2 ~..'U ......1 (1'"' ,.55CIRCUIT .... 41 1 l" 1 œt tQIIII 1 153 OPTIra-(409 SECTION)

OR le 1 • IIU , 123 OR ...

"'.... ...:Jil ..,,47 nN'

NOTES: 2 i37t1LUQ1 -.. 1 (III fil ...... 43 fW:

1. OR LEAD REQUIRED FOR SS-IA PRIVACY27,.....,.... ... .... 1"119 A ~

~.~.,

SYSTEM WITH SYSTEM OVERIDE. l:s2kl 0" ~ (PH9

2. 4015: W OPTION IN PLACE fOR DTMF -I4YT .,'" 26 PT~TteLEPHONE SETS; G OPTION IS ALWAYS45 7 ~'-oJ rREQUIRED FOR SS-IA SIGNALING. , ,

J-TO ADDITIONAL 4Ol5'SAS REQUIRED

TO4-WIRE

STATIONNO. 1

TO4-WIRE

STATIONNO. 1

-24V

Figure 4. Two Station Access ta One SS-1A Une U5ing Two 405'5 and One 4760

Page 4

~.02 ln Figure 2, the 405 is shown connectedto a subscriber station. Th is allows the

et access toone 4-wirecircuit. The addition of1 Wescom 403q Dual Pickup Relay allows the setlCCess to two additional circuits. Each of thesenree circuits, iIIustrated in Figure 2, is al50;erminated in a 402, signaling equipment, and theWl. (This equipmènt is not shown due to spacelimitations.) Each circuit would then he con­Ilected to a, facility (wire line/metallic or carriermultiplex) for ,transmission to other locations.

,2.03 ln Figure 3, two sets are shown con-nected to two 405's and one 403. This

aUows each of the handsets access to two circuits.The transmission circuitry (402, signaling equip­ment, and 401) is again not shown.

2.04 ln Figure 4, two hançjsets are connectedto two 405'5 and then connected to a

Wescom 4760 Dual Station Control. This con­figuration allows the two handsets access to one55-1 A circuit. The use of the 4760 providesindividual station lock-out for privacy operation.One or more 403 Dual Pickup Relays may beemployed in this application, using the techniques'

,shown in Figures 2 and 3. One pickup relay isrequired per station control.

2.05 ln the applications discussed above, thefollowing criteria are met, and must

always be met, -when using the 405 in similarapplications. There must be one station circuitper subscriber set (part of the 405) and one pick­up relay per circuit per subscriber set (part of the405 or two in the 403).

2.06 For further applications information, referto the WesPAC Engineering Manua!.

3. CIRCUIT DESCRIPTION

3.01 The 405 is a printed circuit board moduleused for talk battery, dialing control,

push-to-talk operation, and access to the 4-wireline from a 4-wire station handset. Refer toFigure 7, the' 405 Combination Pickup Relay andStation Circuit Schematic Diagram, during the

Section 405-101/3

foUowing circuit description. Figure 5, Typical2~Wire/4-Wire Key Telephone Set, is providedfor reference purposes only.

3.02 The 405 can be conveniently split intotwo circuits: a pickup relay circuit and a

station circuit. The pickup relay circuit consistsof the pickup relays (PUl and PU2) and theirassociated circuitry. The station circuit consistsof the push-to-talk relay (PT), the dial off·normalrelay (ON), and the talk battery relay (TB) andtheir associated circuitry.

Pickup Relay Circuit3.03 The PU relays operate under the control

of an associated station set A lead. Whenthe associated station goes off-hook, a ground isapplied to the A lead, operating the PU relays.The operation of these relays causes the follow­ing to occur:

(a) The transmission and signaling leads ofthe associated station circuit are con·nected to the circuit common equipmenttransmission and signaling leads termi­nating the 4-wire line,

(b) A ground is provided on the RL lead forring disable to the 409 Group Code Cir­cuit (when used),

(c) -24Vdc is connected over the FW lead tooperate the FW relay in the station set(this functions to convert the set from thestandard 2-wire mode to the 4-wire mode),and

(d) Auxil iary PU relay contacts are operatedto provide various functions depending onapplication.

3.04 When push-to-talk service is not required,, the PU relays, in conjunction with strap-

ping option 5, connects ground to operate the PTrelay in the station circuit. This permits a set tobe used with or without push-to-talk operationdepending on the user requirements and SpecialService arder (550) specifications.

3.05 When VF (Ioudspeaker) signaling is used,the operated PU relays disconnect the

associated speaker fram the receive side of the

Page 5

Section 405-101/3

TOFlG.54Cft FIG sa

FIG. 58

L-._~PUSH~ TO__ _ TAUt

~il]RCVR

~_~- UlXMTR

III0..-----"-

FW

FROMFIG. ~

1. OESIGNATIONS SHOWN FOR 4W 55-1.UNE ASSIGNEO TO PICIWP KEY 4.PIO<UP KEY ~ <XlNVERTED 10 NLISFOR SYSTEM 0\'VtMl€ FUTURE

·2.GROIJND CONNECTOR PIN IllAl!AT THE 47C ASSEMllLY TOPROVIOE LOCAL OVERRlOEFROM PRIVACV LOCICOUT.

NOTE

L: . ...lI:!...

FW

COMMON TRANSMIT PAIRS FROM EACH-TELEPHONETHAT 15 ASSIGNEDEX~• ClUSIVELV TOONE 405 MOUDLE IE.G.,.1R ,T02RTO.3R. nC.AND.1TTO 2T TD3T, E!C.).

>--T-=----~~~

KEY STRtP

;lii,.wJ IR- PU

:/W-IlLl IT~ •OP - DAL. PULSE CONTACTS NOTE;EX - EXa..USlClN SWITCH

:11lR-Wl 211:: ,... FW- 4~AE RELAY

W-BRI 2~'H - HOLOIŒYLS - UNE SWlTCH

:lO-Rl 3R"""CJ' '"" OH - DAL. (FF-fIORM CONT

~R-O) 3T~ LS PU - PICK.... KEY• - INSlJL.ATED AND STOREO

S-R) 4R" t - NETWORK TEFlMINAL

:tR-S) 4T~ •• - AUX. TERMINAL STRf'

:IG-lll() ~~ "'~BK-Gl ~T~

<~(lV-eu ET "'-

«IlL-V) Ef(lJ Yllle

j(1lR-BK) 2~ 0

(lIlL-BK) SG"'" ~.0 0

èV-OI EH0 OP

(O-V) EIl0

3e( 0ê!-IlL! • 4é(lIlL-Y) • 0

AG-V)30

~8, 0

,(V-BRI slt)lBR-V) i:.. j(OH)(v-G)

."."

"'RRI

,IS-V!40 NETWORK

'(G-W)

~~> A~R

~IW-Gl F1~

fllL~)

~~> K1' ~~hl!R-eu

~!IlR-4!l L3G0

.-- ;-g~.

!R-BR)

~:: ~:> U0 J~I-

x~:: ~~ L20 'V

«(G-Y) UiLG

0

1<fa: 180 Lit

'\LS

:rN-<» IH~ ~ li \N1

-",,-M ,:1W-Sl ~....,

l' !......... 1

~-Gl 3H~~1 .

:lBIC«J ~ xBK.-.J ~H-

(O-Y) '" 11

® AC BUZZER

@ oc BUllER

~

3286

319

.34

L 12

LO 37I~

40

1843

AI 2

2730

33A 38Cft 39

lAI! 17 ~--- ~... 1 .LDR 42. é!:;; ~..,. EX 1.:FW 5~~i~:::!':L..·_...l'~~~ ·_)(_· ·_1c?...J FWRT .... èY-BR) 1S0RR III (IBR-Y) '0RNG 20 «H) M0~__"RN 45 (IV-SI RT0L NOTE IAHD2

(î) RINGER CKT

49ON 24

48

23

M'TGCORO

1

264

297

32TR 10

TT 35

13

·3846

2JPT 14

Il

4722

4116

Figure 5. Typical 2-Wire/4-Wire Key Telephone Set

Page 6

Hne to mute the speaker whenthe station handsetisoff-hook.

Station Circuit3.06 The station circuit provides talk battery to

the handset, dialing control, and push-to­talk operation. The TB relay supplies talk batteryand ground to the local station set through thetransmit drop. The talk battery is blocked fromthe transmit Hne by capacitors Cl, C2, C3, andC4. Relay TB is energized by loop current whenthe station is off-hook and is released by the breakportions of a dial pulse train. During dialing withS8-1 A applications, the TB relay converts locpdialing from the set to l-Iead signais to the SS-lAselective signaling equipment.

3.07 The PT relay operates in response to aground signal supplied on the PT laad by

the station set. When relay PT is operated, thetransmit path is terminated on the pickup relaycontacts, and since the relay is operated, thetransmit drop is cut-through to the transmit line.

3.08 Relay ON is energized when the stationset dial is moved off-normal. When relay·

ON is operated, it provides a 2-lead ground corre­sponding to dial-off-normal. The. operation ofrelay ON optionally cuts through the l-Iead out·put, when strapping option NO is utilized. Strap­ping option G is normally employed to provide al-Iead ground during the station off-hook interval.

4. INSPECTION

4.01 Inspect the equipment thoroughly as soonâs possible after delivery. If the equip­

ment has been damaged in transit, immediatelyrepo;t the extent of damage to the transportationcompany.

4.02 Wescom equ ipment is identified by amodel and issue number imprinted on the

front panel. Each time a major engineering designchange is made on the equipment. the issue num­ber is advanced by one number on any followingmodels that are manufactured. Therefore, be sureto include the issue number alon9 with the model

Section 405-101/3

numberwhen making inquiries about the equip­ment.

5. MOUNTING

5.01 The40S is a plug-in module designed tomount in one module mounting position

of a Wescom 400 Mounting Assembly. The 400Mounting Assemblies are available in various mod­ule capacities and allow for Key Telephone Unit(KTU) apparatus-case or .relay-rack mounting..Refer to Sections 400-103 and 400-U-101/3 forfurther information on these mounting assemblies.

6. INSTALLER CONNECTIONS

6.01 When the 405 is installed in its modulemounting position in a 400 Mounting

Assembly, it makes electrical connection to theassociated equipment through a 56-pin, wire­wrapped card connector provided as part of themounting assembly. One card connector is locatedon the backplane of each module mounting posi­tion. Make ail installer connections to this cardconnector in accordance with Table 1.

CAUTIONDo not make any connections with power appliedto the equipment or modules installed in themounting assembly.

Table 1. 405 Installer Connections

CONNECT- TOSfHtlNCONNECTOR

Transmit drop tip lead (T) STransmit drop ring lead (R) 3Receive drop tip lead (RT) 51Receive drop ring lead (RR) 49Transmit line tip !ead (T1) 13

i Transmit line ring !ead IR 1) 15, Receive line tip lead (T) 33

Receive line ring !ead (R) 39A lead 19

NOTES• Ali parenthetical !ettering is a" reterence to schematic designa-tions (reter to Figure 7).tLocaloverride•• ·System override.

Page 7

Section 405-101/3

Table 1. 405 Installer,Connections (Cont)

CONNECT- T056-PINCONNECTOR,

Privacy intrusion key (AGit 30f'riVllCY intrusion key (AGSlt 25Privacy override key (M, 0) •• 23Pril/llCY override key (T, H)" 11'PUsh-tO-taii( I~ad (PT) 9PUsMô~alk lead (PTG) 26PUrelay 8flergizing voltage (N, R, OR a Tl

OPTION).FWI. 43Dial:Gff.normall.·(ON) 4711ead . 12.ead :n31. 29Spaaker tip lead (ST) 35Speaker ring lead (SR) 41RLleed 31A or ZClead 211or S lead 17Ne lead 28CLlead 46Jleed 4P31ead 55Nlead 53C'eac! 52S21ead 38T2lead 56A21ead 54T31ead 50R31ead 48Normally dosed relay contact (PU2-4) 2Normally open relav contact (PT-4) 20Normally open relay contë!Ct (PT-4) 24Normelly dosed relay contact (PU2-1) 32-24V 45Ground 7

NOTES• Ali parenthetical lettering is a refarence 10 schematic designa-tions (refer to Figure 7).tLocaloverride.··System override.

7. OPTIONS

7.01 The 405 is equipped with strapping postsfor conditioning the various circuit op­

tions. Ali strapping posts are located on the foilside of the module. Refer to the following para­graphs for option conditioning information andto Figure 6 for the locations of the strapping posts.

Page 8

•W•

Figure 6. 405 Strapping Option Locations

NOTEAlthough the strapping locations are silkscreenedon the component side of the printed circuitboard, ail strapping is to be done on the foil sideof the board.

CAUTIONWhen installing straps, use insulated strap wire andnot larger than a 3CN1 soldering iron.

7.02 Strapping option S is faetory-installed. Itis used only when push-to-talk operation

is not required. When option S is in place, thePT relay is slaved to the PU relays. If push-to­talk operation is required, remove strapping op­tion S.

7.03 Strapping option G is factory-install'"When option G is in place, a ground is

provided on the 1 lead, under the control of theTB relay, when the station set is off-hook. The1 lead will be momentarily open during dial pulses.This option is normally required for ail 4-wireprivate line applications. If this feature is notrequired, remove strapping option G.

7.04 The ON option, when customer-installed,allows dialing on an SS-l A circuit by a

station when another station at the same loca­tion and serVed by the same SS-l A terminal isoff-hook. The ON strapping option may be usedin the absence of a station control circuit (e.g.,Wescom 4760 Dual Station Control) and the sta­tion control circuit's associated lock-out featuresare not required.

7.05 When a Dual Tone Multi-Frequency(DTMF) telephone is used and the station

. is in a lock-out during dial or privacy application,where an ON lead must be provided, the W strap­ping option is required' to complete the trans­mission path during DTMF dieling.

7.06 The Cl strapping option, when customer­installed, provides external control of the

1·1800 state when the TB ralay is energized throughthe use of the Cllead.

7.07 When ail installer connections and optionconditioning have been completed as re­

quired, the 405 may be mounted in its modulemounting position in the Wescom 400 MountingAssembly.

CAUTIONRemoval and installation of modules should bedone with care. Do not force a module into place.If excessive resistance is encountered while in­stalling a module, remove the module and checkthe card guides and connector to verity properal ignment and the obsence of foreign material.

8. TESTING

8.01 If trouble is encountered with the opera-tion of the 405, verity that ail installer

connections have been completed as required inaccordance with Table 1 and that ail options havebeen conditioned as required in accordance withpart 7. Verity that the module is making goodconnection with the mounting assembly cardconnector; remove and reinsert the module. If

Section 405-101/3

technical assistance is required, contact the Wes­corn Technical Services Department by calling:

(312) 971-2010,TWX 910-695-4735, orDATAPHONE (312) 971-1698

Canadian Customers:(416) 453-2222 orTWX 610-492·2697

9. WARRANTV

9.01 STANDARD WARRANTY: Wescom pro-ducts are warranted to be free from defects

in material, workmanship, and deSign given properinstallation and regular maintenance. Wescom'sobligations under this warranty are limited to cor­rection and replacement at Wescom's productionfacility of any defective items received by Wes­corn, transportation prepaid, for a period of fiveyears from the date of original shipment. War­ranty and remedies on products not manufacturedby Wescom are in accordance with the warrantyof the respective manufacturer. WESCOM MAKESNO OTHER WARRANTYOF ANY KINDWHAT­EVER, EXPRESSED OR IMPlIED; AND AllIMPLIED WARRANTY OF FITNESS FOR APARTICULAR PURPOSE WHICH EXCEEDSTHE AFORESAID OBLIGATIONS IS HEREBYDISCLAIMEp BY WESCOM.

9.02 Field repairs involving the replacement ofcomponents within a unit are not recom·

mended. If an item is found to be defective, con·tact Wescom, Inc., by telephone or TWX, forinstructions regarding replacement or repair.

9.03 If a replacement unit is required, it will beshipped in the fastest manner consistent

with the urgency of the situation. Upon receiptof a replacement unit, retum the defective unitin the carton in which the replacement wasshipped, using the shipping label provided, to:

Wescom, Inc.8245 Lemont RaadDowners Grove, Illinois 60515

Page 9

Section 405-1 01/3

Canadian Customers:Wescom Canada, Ltd.287 Glidden RoadBrampton, Ontario L6Wl H9Canada

10. .SPECI FICATIONS

10.01 The electrical and physical characteristicsof the 405 Combination Pickup Relay and

Station Circuit are as fol/ows:

STATION DROP lIMIT: 200 ohms.

POWER REQUIREMENTS: Filtered"bat­tery required, -21 ta -30Vdc; -24Vdcnominal at 145mA maximum.

(d)

(c) OPERATING ENVIRONMENT: Temper­ature,32° to 12(fF (00 to 5(fC); humid-ity to 95% (no condensation).

MOUNTING: One module mounting posi­tion in a Wescom 400 Mounting Assembly.

(e) WEIGHT: 0.69 lbs (0.31 kg).

(f) . DIMENSIONS: Height, 5.6 inches(14.2cm); width, 1.5 inches (3.8cm);depth, 6 inches (15.2cm).

(a)

(b)

Repair or Exchange Services9.04 ln addition to the standard Wescom War-

ranty Service, Wescom offers a repair orexchange service for those items out of warranty.Under this arrangement, faulty units may beshipped to Wescom for either complete repair andquality testing or exchanged for a replacementunit. To obtain details of this service and ~ sched­ule of priees, contact your local Wescom SalesRepresentative.

Page 10

Section 405-101/3

AG SO ~(-----------------------------pr:"'Xl(--------------------------------~_7: :: A6S

~~ZQ ~ ( XP~~--------------------------~-----~----~) ~ ~~

2~( 1

v---.-DTS 50

'" 48

[: "IICYllNE

S9

...

"...PUI RI,

68,

... :5

PIJl R2",

~ 68

"

"

51

"'] RCVDROP

49 RR

3:l ST

41 SR

HOTES:,. UNLESS OTHERWISE SPEC,FIED:

RES'STORS ARE IN OHMS. ~5'l'o. II2WATT.CAPACITORS ARE IN MtCROFARADS.

2. (- PC BOIo'110 CONNECTOII.S. -PRIMARY TRANSMISSION ""Til.4. --+OPTIONAL STR,llP.5. - FACTORY INSTALLEO 0P11ONAL STIlAP.6. --*"". -+- N.O. N.C. ItELAY CONTACTS.7. WHEN PUSH TO TALI< ISIlEQUIRED,IlEMOYE

OPTION (SI.8. WHEN THE ILEAD 15 TO BE UNDER CONTROL

OF THé: 1<4 8 1<5 RELAY, REMOYE (G) AND (CL)OPTIONS AND ADD (ItO}OPTION.

9. WHEN THE 1lEAD 15 TO BE UNOER EXTERNAlCONTROL. REMOYE (G) AND (HO) OPTIONS ANOADD (CL) OPTION.

10. STRAPlwl OPTION FOR SPECIAL USE OF -PT-RELAYNOT UNDER CONTROL OF·ON- RELAY.

,..., ri

PUZ PT'z,

... "6 1 "~~

1 2ODQ-

IIZTB 1(5+

1~~l G--Z4V

"!Ji! PT ZDOQ

... 5 2 "~~

,

li'

(--------------. -Z4V

Figure 7_ 405 Combination Pickup Relay andStation Circuit Schematic Diagram(Issue 3)

THIS PRINT 15 THE PROPERTY OF WESCOM,INC. ANOSHÀlL NOT BE REPRODUCED. COPIED OR USED INANY MANNER DETRIMENTAl TO THEIR INTERESTS.

RELAY REF. FUNCTIONAL FUNCTIONOE516. DESIG

KI PUI PICK-UP(l1

K2 PUZ PICK-UPl21

K3 PT PUSH TO TALI<K4 ON OfF NORMAL

K5 TB TÀLI: BATTERY

XIolITOROP

3 R

5 T

29 :5 LEAD

31 Rl

,.["----------7) 4 J

PT~

i{~:PT[~ _7: :

-----i~b_4~:~-P*-*~-------7~:::'"- ~ ILEAD

O-~-O j ::: ON l)(6

T8

ON 3

IN4383

PT915 K

CR4

2000PU2

L.---=':d ."Kc:"4---t----O.---Z4V

Iwt

CRZ

lCR~

CR3IN4383

1N4383

1N4383

PUZ

~----(J":,,-4-o__:l

C 5Z

A 19

ON 47

PT 9

PTG 28

Cl 48

NC 28

Tt 58

112 54

TI "XIlIITL1NE

,~ III 15

Page 11