75
Appendix E - Specifications And Features
12.2 MR-3318 System Module and Annunciator Specifications
Unfiltered supply
Power limited / 24V FWR special application / 1.7A max @ 49C
List of Compatible Devices: RAM-1016TZDS, RAM-1032TZDS, RAM-3318-LCD,
RAX-LCD-LITE
Auxiliary relays
Common Alarm/
Supv./Trouble/
Auxiliary Alarm
Must be connected to a listed power limited source
28VDC/1A max
RS-485 port
For remote annunciators. Terminals are labelled “RS-485”.
Ground Fault
Impedance
10 K Ohms
Open Circuit Fault
100 K Ohms
Short Circuit Fault
0 Ohms
Applicable
Standards
UL-864 Rev 9, NFPA 70,72
Table 27 MR-3318 System Modules and Annunciator Specifications
MR-3318 System Modules and Annunciators
RAM-3318-LCD
Remote Annunciator
Standby 70mA / alarm 100mA
RAX-LCD-LITE
Remote Annunciator
Standby 65mA / alarm 80mA
MR-2300T
Remote Trouble Indicator
Normal standby 0mA / alarm 30mA maximum
PR-300
Polarity Reversal and City Tie Module
City Tie
power limited / 24VDC unfiltered / 270mA max / 13.7 and
14.4 Ohms
Polarity Reversal
power limited / 24VDC open / 12VDC at 3.5mA / 8mA
max (shorted)
Polarity Reversal Supv.
Terminal
24VDC (normal) / -24VDC (supervisory) / 0V (trouble)
Polarity Reversal Alarm
Terminal
24VDC (normal) / -24VDC (alarm) / 0V (trouble)
Current Consumption
standby 50mA / alarm 300mA (city tie in use) / alarm
70mA (city tie not in use)
Table 26 MR-3318 Specifications (Continued)
MR-3318 Fire Alarm Control Panel
