User`s guide

Signal Connections • 17
3
Signal Connections
3.1 Connector Pin Assignment
The ACL-7120A comes equipped with five 20-pin insulation displacement
connectors CN1-CN5. CN1 and CN2 are located at the rear plate. CN3, CN4,
and CN5 are located on board. Each of these connectors can be connected
to flat cables of the same type.
CN1 and CN3 are used for digital outputs, CN2 and CN4 are used for digital
inputs, and CN5 is used for the timer/counter. The following diagrams below
show the connector pin assignments:
Legend:
DO Digital Output
DI Digital Input
GND Ground
CLK Clock input for the 8254(8253)
GATE Gate input for the 8254(8253)
OUT Signal output for 8254(8253)
STROBE External signal to latch DI data