Device Description 21
787-2861 Electronic Circuit Breaker
Manual
Version 1.3.1
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3.5
Technical Data
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Table 10: Device
Dimensions (mm) W × H × L
6 × 97.8 × 94
Height from top edge of DIN rail
Weight
37 g
Degree of protection
IP20
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Table 11: Electrical Data
Input
Nominal input voltage
24 VDC (SELV)
Input voltage range
18 VDC … 30 VDC
Required input voltage at which
the channel is activated
(activation threshold)
20 VDC
Input voltage at which the
channel is tripped
(trip threshold)
18 VDC
(20.4 VDC with simultaneous overcurrent at the
channel)
A possible undervoltage is permitted for ca.
10 ms.
Maximum continuous current for
the device
Corresponds to the nominal current of the
device used:
0.5 A, 1 A, 2 A, 3 A, 4 A, 5 A, 6 A, 7 A, 8 A
Overvoltage protection
33 V (suppressor diode at the input)
Zero-signal current for open-
circuit operation at 24 V
12.5 mA
Power dissipation for open-
circuit operation at 24 V
(default)
< 300 mW
Output
Nominal output voltage
Nominal input voltage minus voltage drop
Trip current
(787-2861/0xx0-0000 only)
Corresponds to the nominal current of the
device used:
0.5 A, 1 A, 2 A, 4 A, 6 A, 8 A
Trip current adjustable
(787-2861/0108-0020 only)
1 A, 2 A, 3 A, 4 A, 5 A, 6 A, 7 A, 8 A
Voltage drop between input and
output
At a nominal current between 0.5 A … 2 A:
< 50 mV/A
At a nominal cur
rent ≥ 3
A: 20 mV/A
Wait time after a channel has
tripped
(temperature returns to normal)
Maximum 10 s
(depending on the trip current)
Efficiency
typ.
98 %
Maximum load capacity
> 50000 µF
1
Integrated fuse
15 A (slow)
ON delay
Minimum 170 ms, maximum 500 ms
