Alpha Technologies CFR Redundant Control Unit - Manual (Page 7)

5
1 Introduction
1.2 A Tour of the RCU
Wiring:
The wiring diagram for the terminal blocks is shown in Figure 1.4. Both Inputs share a com-
mon ground
.
The alarm terminal block has Type C contacts to provide Contactor and Alarm status to the
monitoring system.
• Contactor K1 is normally closed.
• Contactor K2 is normally open.
• Red Alert Alarm is open when the system is operating normally.
1.2.2 RCU Interior (Continued)
Figure 1.3
RCU Interior (Cutaway View)
1
8
5
2
6
4
3
7