Hardware manual

Issue 8 Electra Elite
5 - 134 Installing Electronic Telephone Units
7.4.4 Connectors
Refer to Table 5-60 Connector Descriptions (CN2) and
Figure 5-68 ECR-U( ) ETU.
The ECR-U10 ETU has four connectors:
CN1 Connects to the Backboard
CN2 Contacts for Relays
CN3 Both-way Audio Connection for External
Paging
CN4 Audio output for Tone Ringer and Night
Chime
Refer to Table 4-1 MDF Cable Connections for all other
ECR-U( ) cable connections.
Table 5-60 Connector Descriptions (CN2)
Pin Number Description
13~16 Not Used
12
General Purpose Relay #1
11
10
General Purpose Relay #0
9
5~8 Not Used
4
Zone Paging Audio Input
3
2
External Paging BGM input
1