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Specifications
1-6 AFP-300/AFP-400 Installation PN 50253:C1 05/22/97
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Table 1-5 contains specifications for NACs and releasing circuits available on the
MPS-400:
Table 1-5 NACs and Releasing Circuits
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Relays for Alarm, Trouble, Security, and Supervisory are available on MPS-400
terminals TB3 to TB6. Contact ratings for TB3-TB6 are:
• 2.0 A @ 30 VDC (resistive);
• 0.5 A 30 VAC (resistive) when used for a Form-C relay.
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MPS-400 terminals TB2-5 (+) and TB2-6 (–) supply filtered, low-noise power for four-
wire smoke detectors. Specifications for TB2-5 and TB2-6 are:
• Max. ripple voltage: 10 mVrms
• Up to 1.25 A is available for powering four-wire smoke detectors.
For 24 VDC detectors, refer to the Device Compatibility Document for compatible
detectors.
Item Value
Max. wiring voltage drop 2 VDC (except CMX which is 1.2 VDC)
Normal operating voltage 24 VDC
Current for all external devices
connected to MPS-400
6.0 A (except devices powered from the AVPS-24 or
AA-30 and AA-120, or FCPS-24)
Optional AVPS-24 Additional 3.0 A of NAC power for each AVPS-24
(requires ICM-4 modules)
Maximum signaling current/
circuit (MPS-400)
2.5 A (except CMX which is 2 A)
End-of-line resistors MPS-400 (TB-7–TB-10): 2.2K, 1/2 watt
ICM-4, ICE-4, VCM-4, CE-4, and DCM-4: 4.7K,
1/2 watt (2 watts on 70 Vrms audio)
CMX Modules: 47K, 1/2 watt
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