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Cabling
Model 493.42 System I/O Connections
J54 Digital Inputs
Connector J54 Dig In accommodates up to three digital signals from
external devices. You can use digital input signals to trigger test events
with your controller applications.
•
All of the inputs are optically isolated.
•
Channel inputs can be 3 volts (minimum) and 26 volts (maximum)
from an external voltage source.
.
J54 Connector Pin Assignments
NAME
PIN
1
dig in 24V
24 V through 6.6K resistor
2
dig in 1 high
High side of opto-isolator (opto on = logic 1)
3
dig in 1 low
Low side of opto-isolator
4
dig in 2 high
High side of opto-isolator (opto on = logic 1)
5
dig in 2 low
Low side of opto-isolator
6
dig in 3 high
High side of opto-isolator (opto on = logic 1)
7
dig in 3 low
Low side of opto-isolator
8
dig in com
24V common
9
dig in com
24V common
Cable specification
68
FUNCTION
The cabling information shown assumes a single cable destination
(with an overall shield). In other applications, the cable may have
more than one destination. For these applications an overall shield is
not practical and non-EMI connectors and back shells are permissible.
•
9 pin contact type D male EMI connector
•
Back shell–EMI metallized plastic
•
Cable–shielded twisted pairs as required (24 AWG minimum) with
drain wire(s) connected to the metallized backshell at the chassis.
Model 493.02 Controller Service