May 2001
System Hardware Manual 5 - 175
A6-324000-642-01 – Release 4.0
May 2001
5.7.3 LED Indications
Live LED indications are listed below.
✆ Blinking Red Normal Operation
✆ Steady Red Operation Stopped (power still on)
✆ Off No Power
Busy LED indications are listed below.
✆ Steady Red Some Relays Are Busy
✆ Off All Relays Are Idle
5.7.4 Connectors
The following connectors are located on the ECR-U13
ETU. Refer to Table 5-19 Connector Descriptions (CN2)
and Figure 5-39 ECR-U13 ETU.
✆ CN1 Connects to the Backboard
✆ CN2 Relay Contacts for Relays 11 and 12
✆ CN3 Both-way Audio Connection for
External Paging
✆ CN4 Audio output for Tone Ringer and
Night Chime
Table 5-19 Connector Descriptions (CN2)
Pin Number Description
13~16
Not Used
12 Relay #2
General Purpose
11
10 Relay #1
General Purpose
9
5~8 Not Used
4
Zone Paging Audio Input
3
2
External Paging BGM input
1
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