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14.0 Appendix C: Specifications
Table 11 MR-2320 Series Specifications
MR-2320 Series Fire Control Panel Chassis
General Digital Signal Processor (DSP) based design. Fully configurable using front
panel LCD display with Password Access.
Indicating (NAC)
Circuits
2 supervised style Y (Class B) indicating circuits, configured as strobes or
audibles. Terminals are labeled SIG 1 and SIG 2.
Power limited / Regulated 24VDC FWR / 1.7A @ 49C per circuit
Initiating Circuits 6 supervised style B (Class B) initiating circuits, configurable. Terminals are
labeled DET. Compatibility ID A.
Power limited / 19VDC reg. / 3mA for detectors /110MVpp AC ripple / 45mA max
(alarm short)
Releasing Circuit Terminals are labeled SIG 3 and SIG 4
Power limited / Special Application
21.1 VDC @ 1 A max per circuit, 1.7 A max combined
See Appendix A: Compatible Solenoids on page 82 for compatible solenoids.
Supervised Auxiliary
Power (non resettable)
Power limited / 21.1 VDC regulated / 300mA max
4-wire smoke supply
(resettable)
Power limited / 21.1 VDC regulated / 100mA max
RS-485 Connection For Remote Annunciators. Terminals are labelled RS485. Line impedance is
120 Ω.
Electrical ratings AC line voltage 120 VAC 60Hz 1.75 A / 240 VAC 50 Hz 0.93 A, 10A
slow blow fuse on secondary of transformer
Power Supply Rating 6.5A AC maximum @ secondary of transformer
Max power allowed = 5A
• 1.7A (aux power unfiltered if used)
• 0.5A (aux power filtered if used)
• 0.3A (resettable auxiliary power if used)
• 1.7A (for releasing circuits)
Note: If no auxiliaries are used the maximum power is 5 A for the indicating and
the releasing circuits.
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