Eaton EDR 3000 Installation, Operation And Maintenance Manual page 484

EDR-3000 IM02602003E
Zone Interlocking Wiring
The ZI Outputs are for use with connection to electronic inputs only.
The zone interlocking connection between relays is done by means of a twisted shielded cable. Downstream zone
interlock outputs may be paralleled from up to ten devices (FP-5000 or DT-3000 or a combination of both) for
connection to upstream zone interlocked relays.
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