Rockwell Automation 1760-xxxx Pico GFX-70 Controllers User Manual - Manual (Page 55)

Publication 1760-UM002B-EN-P - March 2005
Installation 2-21
Figure 2.21 1760-IA12XOW6I Expansion unit
Connect the inputs, for example, to push button actuators, switches or
relay/contactor contacts.
Input signal voltage range
• OFF signal: 0V ac to 40V ac
• ON signal: 79V ac to 264V ac
Input current
• R1 to R12
0.5 mA/0.25 mA at 230V ac/115V ac
Cable Lengths
Severe interference can cause a “1” signal on the inputs without a proper signal
being applied. Observe therefore the following maximum cable lengths:
• R1 to R12: 40m without additional circuit
The following applies to expansion units:
With longer cables, connect a diode (e.g. 1N4007) for 1A, minimum 1 000V
reverse voltage, in series to the input. Ensure that the diode is pointing towards
the input as shown in the circuit diagram, otherwise the module will not detect
the 1 state.
L1
N
R10 R9 R8 R7 R6 R5 R4 R3 R2 R1 E+ E– R11 R12 N N L
100-240 V
F1