Instruction manual

3-10
IN8
IN7
IN6
IN5
IN4
IN3
IN2
IN1
TB 2
RV1
TB 3
RV8
RV5
D11
RV7
RV6
RV3
RV4
RV2
Digital Voice Module
MDX-2
Figure 3-11
Dry Contact Input Connections
ALARM STATUS OUTPUT CONTACT WIRING
TB1
TRB AUD
TRB COM
TRB NO
TRB NC
ALARM COM
ALARM NO
ALARM NC
+
-
Motherboard (SCMB)
Figure 3-12
Alarm and Trouble Status Output Connections
The location of the Alarm Status output connections are shown in Figure 3-10 Section 2 on Page 3-
10. A magnified view of this area on the Mother Board is shown in Figure 3-12 on Page 3-11.
• Wire gauge selection of the Alarm Status output contact wiring should involve consideration
of all factors including, wire loop length, maximum current capacity, and maximum voltage
drop allowable.
• The Alarm Status output contact is Form C, rated for 0.5 amps at 24VDC, resistive load.
• For terminal connection details of the Alarm Status output contact (shown and marked in
the non-alarm mode) see Figure 3-13.