Continuum I/O System Reference
65
Using the DM-20
The DM-20 is primarily designed to directly interface with the DIO-20 or the GA-40 / GA-
80 Graphic Annunciator Panels. However, it can also be used as a general purpose
digital I/O module containing 20 points.
DIO-20 Interface
The DIO-20 Expansion Module provides a connection for up to 20 solid state input or
output modules for the I/O channels of the DM-20. It includes individually fused sockets
for modules from manufacturers such as Opto 22, Grayhill, Gordos, Crydom and Potter &
Brumfield. You can mix input and output modules on the DIO-20 as needed.
The connection between the DM-20 and the DIO-20 consists of a 25-pin ribbon cable to
supply data between the modules and a two-conductor power cable.
Data connection between the two is accomplished via a 25-pin male-male DB25 cable:
DM-20
DIO-20
DM-20 to DIO-20
Data Connection
DM-20
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