19
UG 6980 / 02.09.16 en / 756
Variants
Characteristics
Failure
Potential cause
LED "ON" does not light up
- Power supply A1+/A2
not connected
LED "ERR" flashes
in relation 1:1
- Under- or overvoltage
(check power supply A1+/A2)
LED "ERR" flashes
in relation 4:1
- external failure (see flashing code)
LED "ERR"
continuously on
- system error
(if cannot be removed after restart
unit must be replaced)
- The device contains no parts that require maintenance.
- In case of failure, do not open the device but send it to manufacturer
for repair.
Maintenance and Repairs
Troubleshooting
UG 6980 ._ _ _ _ / _ 00 /61 DC 24 V
Nominal voltage
UL-approval
Safety function
0 = adjustable
Type of terminals
PC (plug in cage clamp):
pluggable terminal blocks,
with cage clamp terminals
PS (plug in screw):
pluggable terminal blocks,
with screw terminals
PT (plug in Twin cage clamp)
pluggable terminal blocks
with cage clamp terminals 2-wire
Contacts
Type
UG 6980.02
Quadratic total current limit curve
UG 6980.04
Quadratic total current limit curve
M10695_a
- current in contact paths
I , I
1
2
I = I + I
2
2
2
1
2
device mounted without distance heated by
devices with same load,
max. current at
over
4A = 2x4 A = 32A
55°C
2 contact path =
2 2
2
^
device free-standing
max. current at 55°C over
2 contact path = 8A = 2x8 A = 128A
2 2
2
^
25
I
2
(A )
2
75
100
125
50
0
10
20
30
40
60
50
T ( C)
°
M10699_a
- current in contact paths
I , I , I , I
1
2
3
4
I = I + I + I + I
2
2
2
2
2
1
2
3
4
25
I
2
(A )
2
75
100
125
50
0
10
20
30
40
60
50
T ( C)
°
150
175
200
225
250
256A
2
device mounted without distance heated by
devices with same load,
max. current at
over
4 contact path = 1A = 4x1 A = 4A
55°C
2 2
2
^
device free-standing
max. current at 55°C over
4 contact path = 5A = 4x5 A = 100A
2 2
2
^
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