HMC7000 Series I/O Module Guide
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HMC7000 Series I/O Module Guide
79
Digital Outputs (Relay type)
The output terminals of a relay-type digital module typically control loads that require an AC power
source:
Use a Relay Output module to connect a DC load that requires more current than the maximum
available when using a PNP or NPN output. For AC loads, each relay output contact can handle up to
230VAC with a 2A load per contact. For DC loads, each relay output contact can handle a 2A load per
contact for up to 30VDC.
Analog I/O
The analog I/O modules interpret analog signals and write a value to a register in the HMC. The analog
modules are configurable to sense or output current or voltage signals.
Analog Voltage
Analog inputs can measure DC voltage ranges of -10 to +10 volts and 0 to 10 volts. With analog inputs,
the analog module writes a data value to the assigned register (XW) based upon the measured DC
voltage at the input. Analog outputs can provide 0 to 10 VDC with a minimum resistance of 1000 ohms
depending upon the value in the assigned register (XY). I/O resolution is 12-bits.
Analog Current
Analog inputs can measure DC current ranges from 0 to 20mA and 4 to 20mA. With analog inputs, the
analog module writes a data value to the assigned register (XW) based upon the measured DC current
at the input. The analog outputs can provide 0 to 20mA and 4 to 20mA. Analog outputs can deliver a
DC current of up to 20mA to a load with a maximum resistance of 500 ohms based upon the data value
in the assigned register (XY). I/O resolution is 12-bits.