D8 Expansion Module

The D8 is one of the expansion modules available for the RMC75. The D8 adds eight discrete inputs or outputs to the RMC75 motion controller. Up to 32 I/O may be added to the RMC75 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
Weight	113 g + 19 g (connector)
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	2.0 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.
Orange	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).