Wiring
Original instructions
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Signal overview
The following table shows the signal descriptions of the wiring diagram.
Parameter
Description/Usage
INPUT A
Single ended or differential count input or Phase A for quadrature mode.
Single ended (active low only) uses Input 1A+ and/or Input 2A+.
Input 1A- and/or Input 2A- are not connected. Differential input encoders use both plus (+) and minus (-) inputs.
INPUT B
Direction level for non-quadrature devices or Phase B for quadrature mode.
Direction inputs for non-quadrature input devices are: Count Up = High Voltage Level; Count Down = Low Voltage Level
For single ended Input devices, only Input 1B+ and/or Input 2B+ are used. Input 1B- and 2B- are not connected. Differential input encoders use both plus (+) and minus (-) inputs.
PRESET C
Presets count register(s). Low level causes preset.
For single ended Preset inputs, only Preset 1C+ and/or Preset 2B+ are used. Preset 1C- and 2C- are not connected. Differential input encoders use both plus (+) and minus (-) inputs.
OUTPUT RESET 0
Low level resets Outputs 1A, 1B, 2A, and 2B to OFF if latched.
For single ended Reset inputs, only Reset 10+ and/or Reset 20+ are used. Reset 10- and 20- are not connected. Differential input encoders use both plus (+) and minus (-) inputs.
ENABLE
Low level enables counting.
For single ended Enable inputs, only Enable 1+ and/or Enable 2+ are used. Enable 1- and 2- are not connected. Differential input encoders use both plus (+) and minus (-) inputs.
VREF
Field input device power source connection. Also, connect any unused (+) inputs to the group VREF terminal or the one in use (30 Vdc max).
Group A = Terminal 17
Group B = Terminal 37
Group A and Group B VREF supplies can be different voltage levels.
LO FILTER SEL
Enables the internal 200 Hz filter when connected to Return Terminal 39.
OUTPUT
Internal FET switches connect the output supply wired to Terminal 40 to the Output 1A, 1B, 2A, 2B terminals at output assert times.
POWER SUPPLY
External 24 Vdc power supply (+) connection. Required for the module interface and for Outputs 1A, 1B, 2A, and 2B.
RETURN
External 24 Vdc power supply (-) connection. Required for the module interface and for Outputs 1A, 1B, 2A, and 2B.
Miscellaneous Information
Field wire to Counter 2 inputs and outputs, when configured for one, 32 bit counter with output assertion. The unused Counter 1 must have its + (plus) inputs connected to VREF+.
Input counts and parameters are not maintained in the module at power down. The rewrite of parameters at power up must be done with either user logic or Modzoom-type preset panel selections.
The 200 Hz filter for each counter can be activated by strapping the Lo Filter Sel terminal to the Return terminal. This function provides noise immunity for low frequency applications and can also be used for relay debounce.
Wiring diagram 1
Basic wiring diagram showing single ended pulse input, counting up and constant enable.
NOTE: Terminal description:
  • Terminal 1 Pulse encoder input (sinking device)
  • Terminal 3 Input 1B count UP direction
  • Terminal 5 Unused hardwire Preset tied high
  • Terminal 7 Output Reset tied high, not required; outputs not used
  • Terminal 11 Hardware enabled
  • Terminal 15, 16 Outputs 1A and 1B operate relays
  • Terminal 17 Required VRef+ connection
  • Terminals 21, 23, 25, 27, 31, 37 Counter 2 not used. These terminals must be connected VRef+
  • Terminal 39 Required Output Supply Return
  • Terminal 40 Required Output Supply
  • N/C not connected
Wiring Diagram 2
Wiring diagram showing differential pulse input, counting up and constant enable.
NOTE: Zero pulse resets Output 1A and 1B
Wiring Diagram 3
Wiring diagram showing quadratur input with constant enable.
Wiring Diagram 4
Wiring diagram showing differential quadrature input with constant enable.
NOTE: Zero pulse resets Output 1A and 1B