Rockwell Automation 1746-HSCE2 Multi-Channel High Speed Counter Module - Manual (Page 50)

Publication 1746-UM002B-EN-P - August 2004
3-10 Installation and Wiring
Single-Ended Wiring (Discrete Devices)
Figure 3.9 Discrete Device Wiring
(1) Calculate the value of the pull-up resistor (R), as shown below:
For 5V dc jumper position:
For 24V dc jumper position:
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)
5V dc 127 Ω
12V dc 238 Ω
24V dc 2140 Ω
VS
A1(+)
A1(–)
B1(+)
B1(–)
Z1(+)
Z1(–)
+VDC
COM
VS
OUT
COM
OUT
COM
VS
OUT
COM
R
(1)
Power
Supply
Module Inputs
Solid-State
Switch
Proximity Sensor
Photo-electric Sensor
with Open Collector
Sinking Output
R
Vcc Vmin – ( )
Imin
-------------------------------------- =
R
Vcc Vmin – ( )
Imin
-------------------------------------- 1K Ω –
 
 
=