Chapter 2    Specifications 
2 – 74 
Specifications 
Item Specification 
Type EH-CU EH-CUE 
Number of channels  2  1 
Number of counts at the maximum  32 bits(0 to 4,294,967,295) 
Maximum frequency  100 k Hz (25 k Hz at multiplied by 4) 
Count mode  Select by setting of DIP switch. (EH-CU is common to both channels.) 
2-phase, 1-phase (CW/CCW, CK, U/D), 2-phase multiplied by 4 
Differential input current  4 mA minimum 
Differential input voltage  12 to 24V DC 
Minimum ON voltage  10V DC  
Minimum OFF voltage  4V DC 
Insulation system  Photo-coupler 
A:A, CW, CK 
B:B, CCW, U/D 
Number of input 
points 
3 points / CH 
M: Marker (z) 
Phase difference of each channel (A – B) during 2-phase counting 
+45° to +125° when up, -45° to -125° when down 
Minimum counter pulse width  ON: 4 μs, OFF: 4 μs 
Minimum marker pulse width  10 μs (detected at ON edge) 
External wiring method  30-pin connector 
External wiring  Wired with twisted pair cables and batch shielded cables 
Output voltage  12/24 V DC (30 V DC at the maximum) 
Load current  20 mA / point at the maximum 
Output method  Open collector output 
Minimum load current  1 mA 
ON → OFF  1 ms maximum Output delay time 
OFF → ON  1 ms maximum 
Voltage down at ON  1.5 V at the maximum 
Number of external output points  4  2 
  Normal counter  Current value = Set value 1, or Current value > Set value 1 
  Ring counter  Current value = Set value 2 
Leak current  0.5 mA at the maximum 
Polarity  (-) common within the module 
External power supply  12/24 V DC (30 V DC at the maximum) 
Insulation system  Photo-coupler 
Internal current consumption  310mA maximum