Modicon B814-108

The B814-108 Relay Output Module converts signals from the PLC to eight independent relay outputs. Each output is capable of driving a relay, pilot lamp, motor starter, solenoid, or any other load up to 5.0 A. Each of the eight outputs is electrically isolated from the I/O bus and from the other seven outputs by the relay coil. The module is designed to withstand the high surge currents typical of industrial loads.

The module is user configurable as to setting for normally open or normally closed operation of the relays as described below, and is compatible with other Modicon input modules. Assuming a normally open configuration, when the relay coil is energized, the relay contacts will conduct current from output A terminal to output B terminal.

The B814 is initially shipped with all eight channels jumpered for the normally open configuration. You may optionally wire any of the channels for normally closed operation if desired. This is done by transferring a wire jumper from one tab to another on the printed circuit board. Refer to the label on the side of the module.

Wiring Designations:
Channel N.O. N.C.
1 W1-E2 W1-E1
2 W2-E4 W2-E3
3 W3-E6 W3-E5
4 W4-E8 W4-E7
5 W5-E10 W5-E9
6 W6-E12 W6-E11
7 W7-E14 W7-E13
8 W8-E16 W8-E15