Configuration and Status
Chapter 4
9/3/21
Bedrock SPS.500 User Manual - BRDOC125_007
27
Overcurrent Behavior
The Bedrock IDE is used to set a programmable overcurrent limit that will
prevent the SPS.500 output from exceeding the specified limit. An overcurrent
situation might occur if there is a short circuit on either of the SPS.500 outputs.
If the sum of the DC main output current and the DC “OR”ing output current
exceeds the overcurrent limit and then does not fall below a corresponding reset
point, both outputs will turn off and the SPS.500 will enter the overcurrent fault
state. The reset points corresponding to each user
-
selectable overcurrent limit are
shown in Table 4
-
4. Note that for higher output voltage settings, a higher
overcurrent limit may not be selected. Valid output voltage ranges for each
overcurrent limit are also shown in the table. A typical power curve showing the
allowable configuration of the SPS.500 based on the overcurrent levels and
voltages listed in the table is shown in Figure 4
-
5.
The SPS.500 has an accuracy of +/- 10% when detecting overcurrent
conditions, i.e. the SPS.500 may enter overcurrent at a value that differs up to
10% from the configured overcurrent limit(s).
Note that if using revision A the SPS.500, the overcurrent fault state will be
entered if
either
output exceeds the overcurrent limit and then does not fall
below the reset point. For revision A of the SPS.500, both outputs must not be
used at the same time.
Table 4
-
4 SPS.500 Overcurrent Limits
Overcurrent Limit
(Amps)
Reset Point
(Amps)
Valid Output Voltage
Range
10.1
9.09
22- 28 V
11.2
10.08
22- 28 V
12.4
11.16
22- 28 V
13.5
12.15
22- 28 V
14.6
13.14
22- 28 V
15.7
14.13
22- 28 V
16.8
15.12
22- 28 V
18.0
16.20
22- 27 V
19.1
17.19
22- 26 V
