4
LG 7927 / 141119 / 486
Technical Data
Technical Data
Input
Nominal voltage U
N
:
DC 24 V
AC/DC 24 V
Voltage range:
0.9 ... 1.1 U
N
Nominal frequency:
50 / 60 Hz
Nominal consumption:
typ. DC 2.0 W
typ. AC 3.5 VA
Control voltage on S11
:
min. DC 20 V at U
N
Control current in Y1, Y2:
typ. DC 2,2 mA at U
N
typ. AC 3,1 mA at U
N
Short-circuit protection:
Internal with PTC
Überspannungsschutz:
Internal with VDR
Output
Contacts
LG 7927.97:
3 NO contacts, 2 NC contacts
LG 7927.98:
4 NO contacts, 1 NC contacts
ATTENTION! The NC contacts 45-46 can only be used for monitoring.
Contact type:
positive guided
Release delay typ. at U
N
:
Disconnecting the supply:
35 ms
Disconnecting Y1, Y2:
40 ms
Time delay t
v
:
adjustable
fixed
0.1 ... 1 s
1 s
0.3 ... 3 s
3 s
0.5 ... 5 s
5 s
1.0 ... 10 s
10 s
3.0 ... 30 s
30 s
6.0 ... 60 s
60 s
30.0 ... 300 s
300 s
Other time ranges on request
Repeat accuracy:
±
1% of setting value
Thermal current I
th
:
max. 5 A (see quadratic total current limit curve)
Switching capacity
to AC 15
NO contact:
3 A / AC 230 V
IEC/EN 60 947-5-1
NC contact:
2 A / AC 230 V
IEC/EN 60 947-5-1
to DC 13
NO contact:
2 A / DC 24 V
IEC/EN 60 947-5-1
NC contact:
2 A / DC 24 V
IEC/EN 60 947-5-1
to DC 13
NO contact:
4 A / 24 V at 0.1 Hz
NC contact:
4 A / 24 V at 0.1 Hz
Electrcal life:
at 5 A, AC 230 V cos.
j
= 1:
> 2.2 x 10
5
switch. cycl. IEC/EN 60 947-5-1
Permissible switching
frequency:
max. 2000 switching cycles / h
with manual restart and short
release delay time
Short circuit strength
Max. fuse rating:
6 A gL
IEC/EN 60 947-5-1
Mechanical life:
20 x 10
6
switching cycles
General Data
Nominal operating mode:
continuous operation
Temperaturr range
Operation:
- 15 ... + 55
°
C
Strorage:
- 25 ... + 85
°
C
Altitude:
< 2.000 m
Clearance and creepage distance
rated impuls voltage /
pollution degree:
4 kV / 2
IEC 60 664-1
EMC
Electrostatic discharge (ESD): 8 kV (air)
IEC/EN 61 000-4-2
HF irradiation:
10 V/m
IEC/EN 61 000-4-3
Fast transients:
2 kV
IEC/EN 61 000-4-4
Surge voltage
between
wires for power supply:
1 kV
IEC/EN 61 000-4-5
between wire and ground:
2 kV
IEC/EN 61 000-4-5
HF-wire guided:
10 V
IEC/EN 61 000-4-6
Interference suppression:
Limit value class B
EN 55 011
Degree of protection
Housing:
IP 40
IEC/EN 60 529
Terminals:
IP 20
IEC/EN 60 529
Housing:
thermoplastic with VO behaviour
according to UL subject 94
Vibration resistance:
Amplitude 0.35 mm
Frequency 10 ... 55 Hz, IEC/EN 60 068-2-6
Climate resistance:
15 / 055 / 04
IEC/EN 60 068-1
Terminal designation:
EN 50 005
Wire connection:
DIN 46 228-1/-2/-3/-4
Wire fixing:
Plus-minus terminal screws M 3.5
box terminals with wire protection or
cage clamp terminals
Mounting:
DIN-rail
IEC/EN 60 715
Weight
:
approx. 190 g
Troubleshooting
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.
Failure
Potential cause
LED "Power" does not light up
Power supply A1/A2
not connected
LED "K1t" lights up,
but "K2t" remains off
- Signal on Y2 is not present
- Wrong setting of operation mode
(cross fault detection)
LED "K2t" lights up
but "K1t" remains off
- Signal on Y1 is not present
Device cannot be activated
Safety relay is welded
(replace device)
UL-Data
The safety functions were not evaluated by UL. Listing is accom-
plished according to requirements of Standard UL 508, “general use
applications”
Nominal voltage U
N
:
AC/DC 24 V
Ambient temperature:
-15 … +55°C
Switching capacity:
Ambient temperature 45°C:
Pilot duty B300
5A 250Vac Resistive
5A 24Vdc Resistive or G.P.
Ambient temperature 55°C:
Pilot duty B300
4A 250Vac Resistive
4A 24Vdc Resistive or G.P.
Wire connection:
60°C / 75°C copper conductors only
Screw terminals fixed:
AWG 20 - 12 Sol/Str Torque 0.8 Nm
Plug in screw:
AWG 20 - 14 Sol Torque 0.8 Nm
AWG 20 - 16 Str Torque 0.8 Nm
Plug in cage clamp:
AWG 20 - 12 Sol/Str
nfo
Technical data that is not stated in the UL-Data, can be found
in the technical data section.
Summary of Contents for LG 7927
Page 11: ...11 LG 7927 141119 486...
