Johnson Controls tyco Power Pro Series Reference Manual page 277

For currents levels greater than 300mA, a UL listed RM-1 or RM-2 relay module is required.
PGM2 can also be used for 2-wire smoke detectors.
PGM 1, LED Output with current limiting resistor and Optional Relay driver output.
Note: Use only SEOL resistors on FIRE ZONES.
2-wire Smoke Detectors Initiating Circuit
Style B (Class B), Supervised, Power Limited
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Compatibility Identifier HS3-1
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DC Output Voltage 9.4-13.8 VDC
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Detector Load 2 mA (MAX)
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Single-end-of-line (SEOL) Resistor 2200Ω
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Loop Resistance 24Ω (MAX)
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Standby Impedance 1250Ω (NOM)
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Alarm Impedance 664Ω (MAX)
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Alarm Current 97 mA (MAX)
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Maximum number of 2-wire Smoke Detectors 18
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2-wire Smoke Detectors
Compatibility ID For FSA-210 Series is: FS200
Compatible DSC 2-wire smoke detectors:
FSA-210A Series for ULC
FSA-210B Series for UL
FSA-210C Series for EU
6.9 Telephone Line Wiring
Wire the telephone connection terminals (TIP, Ring, T-1, R-1) to an RJ-31x Connector as indicated.
For connection of multiple devices to the phone line, wire in the sequence shown.
Use 26 AWG wire minimum for wiring.
Telephone format is programmed in section [350].
Telephone Call Directions are programmed in section [311] - [318].
Appendix 6: Wiring Diagrams
4-wire Smoke Detectors
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Compatible DSC 4-wire smoke detectors:
FSA-410A Series for ULC
FSA-410B Series for UL
RM-1/RM-2 POWER LOOP
FSA-410C Series for EU
SUPERVISORY RELAY