9-2 Paging Connection
1. PA
Paging
The audio signal line and control line from the PI unit are connected
to clip terminal P1 or P2 inside the terminal board. Fig. 1 shows
how to make connections between the terminal board (BX-610 or
BX-620) and external PA amplifier.
Specifications of each output line
1. Audio signal line
Impedance:
600 ohms, balanced
Output level: —10dBm
2. Control line
Relay contact capacity: 30V DC, 0.5A
If the distance between the terminal board (BX-610 or BX-620)
and external PA amplifier is over 33 feet (10m), use the balanced
type to avoid external noise such as hum. Care should be taken in
selecting a relay for power control of the external PA amplifier
due to the small line contact capacity (30V, DC 0.5A). Refer to
Fig.1.
a.PI-62 Type 1 (PI1)
Power control relay
PA Amplifier
Audio signal
To speakers
AC Power
Fig. 1
Two differrent types of PI Unit, Type 1 (Standard) and Type 2
(modified version of Type 1), are necessary to employ the "All-
call plus 15 or more individual paging zones" function.
1. PI-62 Type 1 (PI1) is different from PI-62 Type 2 (PI2-PI4) in
the following parts being used in each unit.
Table 1
b. PI-62 Type 2 (PI2-PI4)
Type
Parts
PI-62 Type 1 (PI1)
All-call + 7 Paging
Zones (No. 1-7)
PI-62 Type 2 (PI2-
PI4) 8 Zones (No.
8-15,16-23,24-31)
without All-call
Jumper Wire (JW)
Connected
Disconnected
R100(200k
⍀
)
Not mounted
Mounted
Refer to Fig.3 for the modification.
2. For Ex-610 and Ex-620, "Station paging
assignment plug" needs
to be modified. Refer to the following instructions for the
modifications.
Solder the electrolytic capacitor (33 µ F ) to the terminals, and
"PO" and "No. 319" (paired with No. 312) for EX-620, "PO"
and "No. 255" (paired with No. 248) for EX-610 of "Station
Paging Assignment" on the rear of exchange frame. Do not
connect No. 319 (255) to GND.
Polarity of capacitor ... PO: - , No. 319 (255): +
For EX-620
For EX-610
Fig. 3
Fig. 2
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