Rockwell Automation 1769-HSC Compact High Speed Counter Module - Manual (Page 128)

128 Rockwell Automation Publication 1769-UM006E-EN-P - July 2013
Appendix A Specifications
Temperature Derating Refer to the following figures for 1769-HSC temperature derating.
Figure 22 - Maximum Input Voltage - 24V DC Operation
Figure 23 - Maximum Output Voltage - 24V DC Operation
(-32) (50) (68) (86) (104) (122) (140) (158)
Voltage Derating Based on Temperature
Ambient Temperature, °C (°F))
Volts
(DC)
26.4V DC at
55 °C (131 °F)
45204
Temperature Derated Voltage
(1)
(1) Input voltage derating between 55…60 °C is achieved by using a dropping resistor.
For 24V DC input voltage, use a 2.4 k , ½ W resistor.
For input voltages greater than 24V DC, use a ½ W resistor with value: 125 x (V
in
- 5V).
0…40 °C (-32…104 °F) 30V DC
55 °C (131 °F) 26.4V DC
60 °C (140 °F) 5V DC
(-32) (50) (68) (86) (104) (122) (140) (158)
Voltage Derating Based on Temperature
Ambient Temperature, °C (°F)
Volts
(DC)
26.4V DC at
55 °C (131 °F)
45205
Temperature Derated Voltage
0…40 °C (-32…104 °F) 30V DC
55…60 °C (131…140 °F) 26.4V DC