Product:Honeywell 621-1151 IPC 621 INPUT MODULES Plenty stock with good price

The 621 Universal I/0 System offers a variety of 8-, 16-, and 32-point digital modules plus analog and special function modules. Figure 5 presents typical digital I/0 modules. 

The 8- and 16-point modules feature double swing terminal blocks that attach to the rack chassis and fit over the front of the I/0 module. The field wiring is split into two small bundles using terminal blocks - one terminal block swings down, closing from the top of the rack, the other swings up, closing from the bottom; both fit over the installed module. The terminal blocks open for easy installation or removal of the circuit board.

The 32-point I/0 modules use two 19-position terminal blocks that attach to the front of the I/0 Module. The field wiring can be installed in the front of the module using set screws that can be accessed without removing the connector from the module. If a connector must be removed, metal connector bars eject the connectors from the module.

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