Function
Talk-Back from
paging speaker
Conference
External PA Paging
Station Paging
(including priority
paging).
All call plus 15 in-
dividual paging
zones
Combination Paging
Emergency All Call
Paging
Additional Equipment
Required
Talk-Back Unit
Conference Unit
Paging Interface Unit
Paging Interface Unit
Paging Interface Unit
Output Control Unit
Paging Interface Unit
Paging Interface Unit
Unit Model
Nos.
TKU-11
CLU-52
PIU-52/52A
PIU-52/52A
PIU-52/52A
(2 pcs)
OCU-52A
PIU-52A
PIU-52/52A
Remarks
Optional amplifier (10W
max.) may
be
re-
quired depending on application
External PA Equipment is required.
1. Wiring of "Station Paging Assignment
Plug" located at the back of the frame of
the Exchange.
2. Cutting of LMU jumper wire to split sta-
tion paging system. (Refer to Service
Manual for LMU-52/52A, PIU-52/52A).
1. PIU No. 1 is for All Call plus 7 paging
zones (No. 0 ~ 7).
2. PIU No. 2 is for 8 paging zones. (No. 8 ~
15) Adjusting jumper wire on PIU is
required).
3. Wiring of "Station Paging Assignment
Plug" is required.
(Connection of all call signal on 2 PIUs).
1. For EX-510, (64 stations)
Connect "P0" and "256".
2. For EX-520, (128 stations)
Connect "PO" and "312".
OCU-52 must be modified.
(Add M9, M17 and TTL IC 7475 2 pcs.)
PIU-52 can not be used.
Operate by the privacy switch on station
No. 247, or by a circuit to control "OFF/
ON" status of loop current when voice signals
are externally generated.
•
FUNCTIONS WHICH REQUIRE ADDITIONAL UNITS
Those functions of the CPU-55 which require either the addition of specific units or processing in existing units are as
mentioned below. Before installation and adjustment of equipment, make sure to check your system.
(For Data Transmitting and Receiving units, refer to Part 2. "Function Selection for Data Transmitting and Receiving
units" Page 34.)
Position of PIU Units for All-Call Paging and 15 Indivisual Zone Paging
CPU - 55
OCU - 52A
HCU - 52
SGD - 52A
CLU - 52
DLU - 52
LMU - 52A
PIU-52/52A No.1
(Zone 0-7 with All-Call Paging)
PIU-52/52A No.2
(Zone 8-15 without All-Call Paging)
AC POWER INDICATOR LAMP
BATTERY POWER INDICATOR LAMP
BUZZER STOP SWITCH
DS-510A
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