Rockwell Automation 160 Low Profile Drive - Manual (Page 3)

The following curves show the output ratings of a Low Profile Drive based on input voltage
and duty cycle. Duty cycle is calculated based on a 20 second on-time.
(For example: 25% duty cycle = 20 second on time, 60 second off time).
The heatsink of the 160-L is smaller than the heatsink of the standard Series C 160. The 160-L
can not dissipate heat as effectively as the standard Series C 160.
The purpose of these derating curves is to show how much current the 160-L may carry.
The maximum on time that can be used without 100% duty cycle derating is 20 seconds. To
illustrate how the charts function, consider the following examples:
1. 160-L is on for 1 second and off for 3 seconds, the duty cycle is 25%.
2. 160-L is on for 20 seconds and off for 20 seconds, the duty cycle is 50%.
3. 160-L is on for 40 seconds and off for 120 seconds, the duty cycle is 100%.
IMPORTANT: Since the on time in example 3 exceeds 20 seconds, 100% duty cycle derating
must be used regardless of the off time.
160-AA12L (230V)
Fan Cooled
0
2
4
6
8
10
12
0% 25% 50% 75% 100%
Duty Cycle (20 sec. On time)
Amps
Ambient Temperature 30C Ambient Temperature 40C Ambient Temperature 50C
Ambient = 30C
Ambient = 40C
Ambient = 50C