Rockwell Automation 1769-HSC Compact High Speed Counter Module - Manual (Page 61)

Rockwell Automation Publication 1769-UM006E-EN-P - July 2013 61
Installation and Wiring Chapter 3
Figure 16 - Discrete Device Wiring
(1) External resistors are required if they are not internal to the sensor. The pull-up resistor (R) value depends on
the power supply value. The table below shows the maximum resistor values for typical supply voltages. To
calculate the maximum resistor value, use the following formula:
where:
R = maximum pull-up resistor value
VDC = power supply voltage
Vmin = 2.6V DC
Imin = 6.8 mA
The minimum resistor (R) value depends on the current sinking capability of the
sensor. Refer to your sensor’s documentation.
Power Supply Voltage (V DC) Pull-up Resistor Value (R), Max (1)
(1) Resistance values can change, depending upon your application.
5 352

12 1382

24 3147

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
VDC Vmin
–
Imin
-------------------------------------------- =