2-Wire); Pulse Output Specification - Honeywell ERX350 User Manual

2 ERX350 Installation
2.8 Digital Input / Output Wiring
GND is at TB4 pin
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JP1 and JP2 are both across pins B-C
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2.8.4.2 RS-485 (2-wire)
'A-' is made at TB4 pin 1 (TXD)
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'B+' is made at TB4 pin 2 (RXD)
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JP1 and JP2 are both across pins A-B
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2.8.5 Pulse Output Specification

Following are the specifications for pulse output.
All outputs are isolated from ground and each other.
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Outputs are rated for DC values from 0 to 30.0 volts, non-polarized in non-hazardous locations.
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In Division 1 or Zones 1 & 2 hazardous locations, voltage rating is reduced to 8 volts maximum.
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Each circuit includes 100 ohms of current limiting resistance.
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Maximum load current 20 mA.
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Honeywell
2023
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