Appendix A
Appendix A Technical Specification A
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A.14 ADAM-4055 Isolated Digital Input/Output Module
Table A-18 ADAM-4055 Specifications
DI/O channel
number
8 digital inputs
8 digital outputs
Input/Output
speed (bps)
Maximum distance
RS-485 (2-wire)
1200, 2400, 4800, 9600, 19.2K, 38.4K,
57.6K, 115.2K
4000 ft. (1200 m)
Isolation voltage 2500 VDC
Opto-isolator
response time
25 µs
Over-voltage protect 70 VDC
ESD (Electro Static
Discharge)
2000 VDC
Digital input level
Dry Contact:
Logic level 0:
Logic level 1:
Wet Contact:
Logic level 0:
Logic level 1:
Open
Close to GND
+3V maximum
+10 to 50V
Digital output
Sink-current
Power dissipation
Open collector to 40 V
200 mA maximum
Channel: 1W maximum
Total: 2.2W (8 channels)
LED Indicator: On: Active
Off: Non-active
Support protocol ADAM ASCII and MODBUS/RTU
Watchdog timer System (1.6 second) and communication
Power supply +10 to +30 VDC (non-regulated)
Power consumption 1.0 W @ 24 VDC