The 140 EHC 202 00 is a two-channel module best suited for high-speed counting applications up to 500 kHz or for applications that require a quadrature counter interface.
The following operating modes are possible:
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16-bit counters on one or both channels with two outputs, configurable for incremental or quadrature mode
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32-bit counter that uses both channels with two outputs, configurable for incremental or quadrature mode
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32-bit counters on one or both channels with no outputs, configurable for incremental or quadrature mode
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16-bit counters on one or both channels with no outputs, in rate-sample mode for incremental or quadrature encoders
Two FET output switches exist for each counter. They turn on when the counter reaches programmed setpoint or maximum values in up-count/down-count operations.
The outputs can be turned off by changes in counter values, software commands, or a hard wired reset from the field.
Each of the outputs can be configured as follows:
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Output latched on at setpoint
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Output latched on at a terminal count
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Output timed on at setpoint, with a time range of 0 ... 16 383 ms (only one of the four possible outputs can be configured for this mode)
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Output timed on at a terminal count, with a time range of 0 ... 16 383 ms (only one of the four possible outputs can be configured for this mode)
The following figure shows the EHC 102 module and its components.
1
Model Number, Module Description, Color Code
2
LED Display
3
Fuse Cutouts
4
Field Wiring Terminal Strip
5
Removable Door
6
Customer Identification Label (Fold label and place it inside door)
NOTE: The field wiring terminal strip (Modicon #140 XTS 002 00) must be ordered separately. (The terminal strip includes the removable door and label.)
