Engineering; Length Of Input Cables - Eaton easyE4 Manual

1.10 Engineering

1.10.1 Length of input cables

The easyE4 series makes it possible to combine multiple voltage variants. Each easyE4
base device can be wired with up to 11 EASY-E4-...-...E1(P) expansions with different
power supplies.
Severe interference can cause a signal 1 on the inputs without a proper signal being
applied. Observe therefore the following maximum cable lengths:
Base device inputs I1–I6
40 m for AC supply voltages; 100 m for DC supply voltages
l
Base device inputs I7–I8
100 m for AC supply voltages; 100 m for DC supply voltages
l
Expansion device inputs
40 m for AC supply voltages; 100 m for DC supply voltages
l
In addition, the following applies to base devices and expansion devices:
With longer cables, connect a diode (e.g. 1N4007) with a minimum reverse voltage of 1
kV and a let-through current of 1 A in series to the device inputs. Ensure that the diode
is pointing to the input; otherwise the device will not be able to detect the 1 state.
easyE4 10/19 MN050009 EN www.eaton.com
1. easyE4 control relays description
1.10 Engineering
39