Rockwell Automation 1769-HSC Compact High Speed Counter Module - Manual (Page 23)

Compact I/O High-speed Counter Module 23
Publication 1769-IN030B-EN-P - October 2010
Temperature Derating
The following graphs indicate how much current can be drawn from the power supply at the
indicated case temperature without damaging it.
Maximum Input Voltage - 24V DC Operation
Maximum Output Voltage - 24V DC Operation
Temperature Derated Voltage (1)
(1) Input voltage derating between 55…60 °C (131…140 °F) is achieved by using a dropping resistor.
For 24V DC input voltage, use a 2.4 k
Ω, ½ W resistor.
For input voltages other 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) 26.4VDC
60 °C (140 °F) 5V DC
Temperature Derated Voltage
0…40 °C (-32…104 °F) 30V DC
55…60 °C (131…140 °F) 26.4V DC
(-32) (50) (68) (86) (104) (122) (140) (158)
Ambient Temperature, °C (°F)
Vo
lts
(DC
)
Voltage Derating Based on Temperature
26.4V DC at
55 °C (131 °F)
45204
(-32 ) (50) ( 68) (86) (104) (122) (140) (158)
Vo
lts
(DC
)
Voltage Derating Based on Temperature
Ambient Temperature, °C (°F) 45205
26.4V DC at
55 °C (131 °F)