Service Manual

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6802800U74-AN
Chapter 4: Hardware Installation
4.11
External Alarm Cabling
The MTS supports the following alarm inputs and control outputs in all configurations:
• 15 opto-isolated 12 V alarm inputs
- Alarm inputs and Alarm ground are floating
• External alarms are connected to an External Alarm 2-16 port and one of the 6 GND (Alarm) ports
• The 6 GND (Alarm) ports are connected internally
• External alarm voltage (open) = 12 V typical
• External alarm current (short circuit) = 8 mA typical
• Control output 1 (2 pins) = alarm relay (Normally Open and Common contacts)
• Control output 2 (2 pins) = alarm relay (Normally Open and Common contacts)
The alarms/outputs connections are located on the junction panel.
NOTICE: Figure 82: MTS 2 Junction Panel Alarm Wiring Connection on page 138 and Figure
83: MTS 4 Junction Panel Alarm Wiring Connection on page 139 depicts the newer version of
the MTS Junction Panel. There may be small differences in older configurations.
Figure 81: MTS LiTE Junction Panel Alarm Wiring Connection
Figure 82: MTS 2 Junction Panel Alarm Wiring Connection
User Alarms / Controls
User Alarms/Controls