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Safety Technique
SAFEMASTER
Safety Module For Safety Switches
LG 5925/920
LG 5925/900
Function Diagram
button on
light curtain
output
K1
K2
Block Diagram
A1(+)A2(-)
S11
S12 S22
Overvoltage and
Monitoring logic
short circuit prot.
K2
24V
Power
K2
S21
M6666
All technical data in this list relate to the state at the moment of edition. We reserve the right for
technical improvements and changes at any time.
M5765
S33 S34
13
23
33 41
K1
K1
K2
K1
14
24
34 42
• According to
- Performance Level (PL) e and category 4 to EN ISO 13849-1
- SIL Claimed Level (SIL CL) 3 to IEC/EN 62061
- Safety Integrity Level (SIL) 3 to IEC/EN 61508
• to connect:
- safety switch NE 5020
- safety switch NE 5021
• Output: max. 4 NO contacts, see contacts
• 1- or 2-channel operation
• Line fault detection on On-button
• Manual restart or automatic restart, switch S2
• with or without cross fault monitoring switch S1
• LED indicator for state of operation
• LED indicator for channel 1 and 2
• Wire connection: also 2 x 1.5 mm
2 x 2.5 mm
solid DIN 46 228-1/-2/-3/-4
2
• As option with plugable terminal blocks for easy exchange
of devices
- with screw terminals
- or with cage clamp terminals
• Width 22.5 mm
Approvals and Markings
Applications
Protection of people and machines
• Monitoring of safety gates
Indicators
upper LED:
lower LEDs:
Notes
Line fault detection on On-button:
The line fault detection is only active when S12 and S22 are switched
simultaneously. If The On-button is closed before S12, S22 is connected
to voltage (also when line fault across On-Button), the output contacts will
not close. A line fault across the On-button which occurred after activation
of the relay, will be detected with the next activation and the output con-
tacts will not close.
13
stranded ferruled, or
2
A025518
on, when supply connected
on, when relay K1 and K2 energized
LG 5925/920 / 19.05.16 en / 686
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