Allen Bradley 1756-DICAM Digital Cam Switch Unit

The CamCon 1756-DICAM digital cam switch unit has been made for Allen Bradley ControlLogix 1756 PLC systems. It is used in industrial applications where switching operations are periodically repeated.

Digital cam switches are an ideal replacement for mechanical switch units and they offer additional advantages including simple mounting and adjustment processes, repeatable adjustment processes, reliability, high-speed switching, and speed compensation. A total of 32 status LEDs are provided on the module’s front panel. The interfaces on the 1756-DICAM cam switch includes the ControlLogix 1756 backplane bus interface and the optional RS-485 interface for testing. There are 24 outputs on the module which are electrolytically separated for ControlLogix configuration. There are 8 inputs on the module which are also electroytically separated. The number of outputs and inputs is extendable to 200 through an external interface option.

The 1756-DICAM cam switch supports 1200 programmable cams. The number of cams can be increased to 4000 and even to 10,000 depending upon application requirements. Three options for data storage are available, including 16 KB, 48 KB, or 128 KB of EEPROM. The 1756-DICAM cam switch supports 32,768 programs. The cycle time or switchover speed is 70 microseconds and it can be adjusted. The delay time compensation can be set from 0 to a maximum value of 9999.9 milliseconds. The maximum length of the cable between CamCom 1756-DICAM cam switch and the measuring system is 300 meters at SSI (1000-meter options also available). The 1756-DICAM cam switch draws 450 milliamps from the chassis backplane at 24 Volts DC. The output current is 0.2 Amps for each output or 0.4 Amps for each output at 50% on the switch time. The enclosure of the module is rated for an IP 20 level of protection and the operating temperature range is from 0 to 55 degrees Celsius. The module weight is 350 grams.

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