D8 Expansion Module

The D8 is one of the expansion modules available for the RMC70. The D8 adds eight discrete inputs or outputs to the RMC70 series motion controller. Up to 32 I/O may be added to the RMC70 if the allowed maximum of four expansion modules are all D8s.

Each I/O is individually configurable in software as an input or output.

Features

Eight discrete I/O points. Each is individually selectable as an input or output.

Uses

The discrete I/O on the D8 can be used for the following purposes:

Turn outputs on and off with commands
Use discrete I/O in User Programs
Use discrete inputs to start User Programs
SSI homing
Physical Limit Inputs

Part Number

The part number of the D8 module is EXP70-D8.

Specifications

General
DI/O points	8; each is individually configurable as inputs or outputs.
Inputs
Input Characteristics	12-24 VDC, sinking or sourcing
Logic Polarity	True High
Isolation	2500 VAC
Input "High" Range	7 to 26.4 VDC (polarity independent) 3 mA maximum
Input "Low" Range	0 to 3.5 VDC (polarity independent) <1 mA
Maximum Propagation Delay	100 µsec
Outputs
Outputs	Solid State Relay
Isolation	500 VAC
Maximum voltage	± 30 V (DC or peak AC voltage rating of SSR)
Maximum current	75 mA
Maximum propagation delay	1.5 ms
Logic 1 (True, On)	Low impedance (50 Ω maximum)
Logic 0 (False, Off)	High impedance (<1 µA leakage current at 250 V)

LEDs

The D8 expansion module has 1 LED per I/O. The LEDs reflect the state of the input.

State	Description
No color	The input or output is off.
Green	The output is on.
Amber (yellow)	The input is on.

Note:
Forcing an input will not affect the state of the LED. Only a physical current that turns on the input will make the LED red.
Forcing an output will make the LED green, because the output will physically be on (conducting).