Chapter 4 - Terminals and Optional Equipment
Chapter 4 4 - 27
SECTION 4-8
EXTERNAL PAGING AND DOOR BOX/PAGE RELAYS
4.8.1 External Page Relays
Four external dry contact relays are available when a 2PGDAD is installed which can be used to activate
ancillary devices (i.e. door unlock devices). The CCPU also provides 1 relay. The CCPU relay is set in
Program10-21-05When the relay on the 2PGDAD is used, there is no need to assign the relay to the Door
Box - simply connect the relay as detailed in the steps below for the Door Box used. The relays on the
2PGDAD modules are numbered 5-8. Each Door Box/external page circuit provides a dry relay contact.
Program Note: Program 10-21-05 sets the general purpose relay switch on the CCPU. If set for External
Speaker, service code 803+1 pages and the relay closes. The relay reopens upon hang up. If set for General
Purpose Relay, service code 880+0 toggles the relay open or closed.
● The service codes indicated are the default codes. Refer to Program 11-12-20 and 11-12-50 to redefine
these codes as needed.
4.8.2 Door Box /External Page Relay Contacts (Figure 4-16 - Figure 4-17)
4.8.2.1 To connect a dry contact relay device to a Door Box/External Page Relay:
1. Connecting to the CCPU:
Connect an RCA line from the CN8 or Cn9 connector on the CCPU to the appropriate location
on the extension cross-connect block.
2. Connect the two-conductor station cable from the cross-connect block to the external relay.
3. Install bridging clips as required.
OR
1. Connecting to the 2PGDAD Module:
Make sure the jumper in the 2PGDAD module for the channel is set correctly. (Refer to Figure
4-4 JUMPER SETTINGS on page 4-5).
2. If a line cord was not previously connected to the 2PGDAD, complete Steps 3-6. Otherwise,
skip to Step 7.
3. Install a modular jack for each 2PGDAD module. For each module, run one-pair 24 AWG
station cable from the cross-connect block to a modular jack. Ground the unused pair.
4. Terminate the extension leads to GRN/RED of the modular jack. Terminate the unused leads
to the jack.
5. Install bridging clips as required.
• If Relays 5 and 6 on a 2PGDAD are set as General Purpose relays, they cannot be
used for Door Box/Page relays.
• Program 10-21-05 sets the relay switch on the CCPU.
• If the General Purpose relay is set to 1 (Relay 1), the page relay cannot function on the
CCPU. General Purpose relays override Paging relays and the Paging relay is
associated with Relay 1 on CN10.
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