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Home --> Fire Alarm Systems
I56-0784-030_MI-CZME
  • General
  • Feature
  • Specification
The MI-CZME conventional zone monitor module provides an interface between a zone of conventional 2-wire fire detectors and an intelligent signalling loop. The module monitors the conventional zone and transmits the state of the zone (NORMAL, OPEN/SHORT or ALARM ) to the panel. The MI-CZME features a power supply fault input T5. When the voltage at this terminal is pulled to ground, a fault signal is indicated at the panel. The power for the conventional zone is provided either by an external power supply, or directly from the communication line. Use of the MI-CZME without an external power supply also results in more current being drawn from the communication loop. Please refer to the control panel installation manual for information on system design constraints. When the power for the conventional zone is taken from an external power supply, the communication line is fully isolated from the conventional zone and from the power supply. The external power supply must have a battery backup feature if required by local codes of practice. Morley IAS also recommends the use of a power supply with earth fault detection. The conventional zone current is limited to 60mA. A pair of break-off tabs is provided on the PCB (see Figure 3) to allow the current limit to be reduced. If the tabs on the PCB are broken, the maximum zone current is limited to 20mA.
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Communication Loop Supply Voltage: 15 - 32V Communication Loop Standby Current ( External PSU, No communication): 200μA (Max.) Communication Loop Standby Current ( External PSU, Communication every 5 seconds): 300μA (Max.) Communication Loop Standby Current ( LED on): 5.1mA (Max.) Maximum Conventional Zone Voltage: 25.5V @ 0mA Conventional Zone Current Limit (PC Board Tabs removed): 20mA (Max.) Conventional Zone Current Limit (PC Board Tabs not removed): 60mA (Max.) Reset Voltage (Terminal B): 0.4V (Max.) @ 15mA Maximum Conventional Zone Standby Current (No External PSU, comm. line @ 24V): 9mA End-of-Line Resistor Value: 3.9kW, 5% External Power Supply Voltage: 18 - 32V Maximum Line Impedance, Conventional Zone: 100W Power Supply Fault Input (Active Low): 0.2V (Max.) Environmental Specifications Temperature Rating: -10°C - 60°C Relative Humidity (no condensation): 10% - 93% Mechanical Specifications Wire diameter for screw terminals: 1 - 2mm Box dimensions (mm): 32 x 70 x 70 Mounting plate dimensions (mm): 121 x 107 Weight: 140g
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