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8 DIGITAL INPUTS WITH BATTERY BACKED COUNTERS
The MM8DIB module is an 8 channel digital input module. The inputs are isolated from the logic by bi-directional opto-couplers. The inputs are divided into 2 isolated groups of 4 inputs each. This allows for many configurations in which the input module may be used. One such configuration could be where one group is connected as common positive and the second group connected as common negative. All eight inputs (1-8) have internal counters associated with them. These counters are 32 bit counters allowing a count value from 0 to 4294967295. The count value can be cleared by writing a zero to the associated registers or preset to any other value using the same method. The counters can also be reset automatically when read. This is done by setting on DIP switch 9 on the front panel. A filter register is provided for each input channel. The user can write a value to this register between 1 and 255. The input filter time is this value X 5milliseconds. If a zero (0) is written to this register the counter will be disabled. Note: The count values are battery backed-up and will not be lost if power is turned off. The format of the registers allows the status of the inputs to be read as either single bits or all at once as a single register on the Modbus network.
Power Supply: 10 -26 Vdc @ 50 mA Inputs: Supply Voltage 10 - 26 Vdc Supply Current 8 X 4 mA @ 12Vdc / 8 X 8 mA @ 24Vdc Isolation 1500Vrms between field and logic Counters: Inputs 1 to 8 Resolution 32 Bits Frequency 50 Hz (Max) Pulse Width 10ms (min) Connector: 11 Pin Connector on rear of unit 10 Way screw connector on front
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