Maintenance And Repairs; Characteristics - DOLD SAFEMASTER BG 5925/920 Fiche Technique Et Manuel D'utilisateur

Troubleshooting
Failure
LED "Power" does not light up
LED "K1" lights up,
but "K2" remains off
LED "K2" lights up,
but "K1" remains off
Device cannot be activated

Maintenance and repairs

- The device contains no parts that require maintenance.
- In case of failure, do not open the device but send it to manufacturer
for repair.
Characteristic
250
200
150
100
50
0
0,1 0,3 0,5 1
switching current A
safe breaking, no continuous arcing,
max. 1 switching cycle / s
Arc limit curve under resistive load
Potential cause
- Power supply not connected
- Safety relay K1 is welded
(replace device)
- A 1-channel switch-off occurred on
S12 (switch channel off on S22)
- Safety relay K2 is welded
(replace device)
- A 1-channel switch-off occurred on
S22 (switch channel off on S12)
- Safety relay K2 is welded
(replace device)
- Incorrect setting of switch S2
- Manual start mode:
Line fault on start-button (disconnect
power supply and remove fault)
- Automatic start mode:
S33-S34 not bridged
3 5 10

Characteristics

S 2 ( A ) 2
I
75
60
45
30
15
0 10 20
device mounted on distance with air circulation.
max. current at 55°C over
3 contactrows = 4A
device mounted without distance heated by
devices with same load,
max current at 55°C over
3 contactrows = 1A 3x1 A =3A
S 2 2 2 2
I = I + I + I
1 2 3
I , I , I - current in contactrows
1 2 3
Quadratic total current limit curve
electric life DC13 24V DC / t on 0,4s; t off 9,6s
2 contacts in series
0,9
0,8
0,7
0,6
0,5
0,4
0,3
0,2
0,1
0
0 1 2 3 4
switching current I [A]
Contact service life
15
2
48A
°
T ( C)
30 40 50 60
M8931_a
2 2 2
3x4 A =48A
2 2 2
5 6 7 8
BG 5925/920 / 02.05.17 en / 851