Rockwell-automation 1760-xxxx Pico GFX-70 Controllers User Manual Uživatelský manuál Strana 55

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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
R10R9R8R7R6R5R4R3R2R1E+ E–
R11
R12 NNL
100-240 V
F1
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