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Card Slot D: 8 Digital Inputs Card (8 DI)
Connect up to 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 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 of the SEL-751A manual.
Card Slot Z: Current Inputs Card
Connect phase current and neutral current inputs as shown in the typical connections diagram.
Step 1. Connect 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 neutral current IN inputs to terminals 07 and 08.
Connections
