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Card Slot D: 8 Digital Inputs Card (8 DI)
Connect as many as 8 digital inputs per application requirements to inputs IN_01 (terminals 01 and 02), IN_02 (terminals
03 and 04), . . ., IN_08 (terminals 15 and 16).
Card Slot E: Voltage/Current Inputs Card
Connect 4-wire wye-connected PTs or open-delta connected PTs as shown in the typical connections diagram. For other
PT connection options refer to Section 2 in the SEL-787 manual. Connect neutral current input to terminals 09 and 10.
Card Slot Z: Current Inputs Card
Connect Winding 1 and Winding 2 phase current inputs as shown in the typical connections diagram.
Step 1. Connect Winding 1 Phase A, Phase B, and Phase C current inputs to terminals 01 and 02, terminals 03 and 04,
and terminals 05 and 06, respectively, following the convention shown in the typical connections diagram.
Step 2. Connect Winding 2 current inputs similarly to terminals 07–12.
Refer to Section 2 in the SEL-787 manual for additional details.
Connections
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