Logic supply +Vcc (+5, +15 or +24 V dc) and dc return is supplied through the 2 terminal logic supply connector, marked + or –.
Logic supply dc return is connected to all odd pins on the signal side.Signal pin is pulled up to +Vcc when not asserted, down to dc return when asserted.
Power-side terminals are polarized for dc applications, and non-polarized for ac applications.
The backplane is shipped with a jumper configuration to supply the logic voltage on pin 49 of the edge connector.
1781-A24H2 mounting boards can be used with up to 24, 1781-series slim, miniature or standard modules. The terminal block accepts insulated wire with stripped ends or ferrules. Each power side point is individually isolated from each other. The signal side has a common logic supply bus (+Vcc and dc return) shared with each of the modules. The 1781-A24H2 has a header connector. The field connection and logic power are made via removable terminal blocks. (For spare connectors, use WRC part number 1781-A24H2-CK.) Specify 1781- CxHx Cable Assembly for the 1781-A24H2. DIN-rail mounting is not available.
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