Omron HOME SECURITY SYSTEM - MOTION SENSOR FQM1-MMA21 - Manual (Page 173)

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Pulse Inputs Section 7-5
7-5-4 Pulse Input Specifications
Item Specification
Number of
pulse inputs 2 inputs
Note High-speed counter 1 can be an RS-422A line-driver input or an input with a voltage of 24 VDC.
High-speed counter 2 can be an RS-422A line-driver input or an input with a voltage of 24 VDC,
except for the FQM1-MMA21, which supports only line-driver inputs to high-speed counter 2.
Signals Encoder inputs A and B and pulse input Z
Ports High-speed counters 1 and 2 High-speed counters 1 and 2
Input voltage 24 VDC ±10% RS-422A line-driver (AM26LS31 equivalent)
Phases A and B Phase Z Phases A and B Phase Z
Input current 5 mA typical 8 mA typical 10 mA typical 13 mA typical
ON voltage 19.6 V DC min. 18.6 V DC min. --- ---
OFF voltage 4.0 V DC max. 4.0 V DC max. --- ---