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The Modicon 140CPU42402 Controller Module is a Quantum CPU with local, remote, and distributed I/O capabilities. The module has two types of communication ports: one Modbus RS232 port and two Modbus Plus RS-485 network ports. The module requires a Bus current of 1.8 Amps and has a power dissipation of 9 Watts. It can utilize a maximum of six NOM, NOE, and MMS modules in any combination.
Below is a diagraph of the 140CPU42402's external features.
Two, three-position slide switches are located on the front of the 140CPU42402. The left switch is utilized for memory protection when in the top position and no memory protection in the bottm and middle positions. The three-position slide switch on the right is used to select the communications parameter settings for the Modbus RS-232 ports. The module defaults to bridge mode when the front panel switch is set to RTU or ASCII mode. When networking controllers, a panel device connected to the CPU's Modbus port can communicate with the controller to which it is connected, as well as log any nodes in the Modbus Plus network.
The following figures show the 140CPU42402 Error Codes:
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