Ordering Example; Troubleshooting; Maintenance And Repairs; Characteristic - DOLD SAFEMASTER LG 7927 Mode D'emploi

Ordering Example

LG 7927 ._ _ _ _ /61 AC/DC 24 V

Troubleshooting

Failure
LED "Power" does not light up
LED "K1t" lights up,
but "K2t" remains off
LED "K2t" lights up
but "K1t" 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.
Nominal voltage
UL approval
Type of terminals
without indication:
terminal blocks fixed,
with screw terminals
PC (plug in cage clamp):
pluggable terminal blocks
with cage clamp terminals
PS (plug in screw):
pluggable terminal blocks
with screw terminals
Contacts
Type
Potential cause
Power supply A1/A2
not connected
- Signal on Y2 is not present
- Wrong setting of operation mode
(cross fault detection)
- Signal on Y1 is not present
Safety relay is welded
(replace device)

Characteristic

2
S ( A ) 2
I
100
80
60
40
20
0
10 20
AC/DC 24V device mounted on distance with air circulation.
max. current at 55°C over
^
4 contactrows = 4A = 4x4 A =64A
AC/DC 24V device mounted without distance heated by
devices with same load,
max current at 55°C over
^
4 contactrows = 1,5A = 4x1,5 A =9A
S I = I + I + I + I
2 2 2 2
1 2 3
I , I , I , I
- current in contact paths
1 2 3 4
quadratic total current limit curve
15
2
64 A
°
T ( C)
30 40 50 60
M10191
2 2 2
2 2 2
2
4
LG 7927 / 11.03.20 en / 273A