Rockwell Automation 1746-HSCE2 Multi-Channel High-Speed Counter Installation Instructions - Manual (Page 13)

Multi-Channel High-Speed Counter 13
Publication 1746-IN002A-US-P
Single-Ended Wiring (Discrete Devices)
(1) External resistors are needed if not internal to the sensor. Check your sensor’s documentation.
The pull-up resistor (R) value depends on the power supply value. The table below shows
resistor values for typical supply voltages. To calculate the resistor value, use one of the
following formulas:
For 5V dc:
For 24V dc:
where:R = pull-up resistor value
Vcc = power supply voltage
Vmin = 4.2 V dc
Imin = 6.3 mA
Power Supply Voltage (Vcc)
Pull-up Resistor Value (R)
(1)
(1) Resistance values may change, depending upon your application.
5V dc 127
Ω
12V dc 238
Ω
24V dc 2140
Ω
VS
A(+)
A(–)
B(+)
B(–)
Z(+)
Z(–)
+VDC
COM
VS
OUT
COM
OUT
COM
VS
OUT
COM
R
(1)
Power
Supply
proximity sensor
photoelectric sensor
with open collector
sinking output
Module Inputs
solid-state
switch
R
Vcc Vmin –
( )
Imin
------------------------------------ =
R
Vcc Vmin –
( )
Imin
------------------------------------ 1 K Ω
–  
 
=