Product Description; Function Diagram; Block Diagram; Approvals And Markings - DOLD SAFEMASTER LG 7928 Mode D'emploi

Safety Technique
SAFEMASTER
Delay Module, Release Delayed
LG 7928

Product Description

The LG 7928 can be used for delayed stopp with status request of the
safety relays (Stop category 1 acc. to DIN EN 60 204-1) or controlled
stopping of plant components.

Function Diagram

U
U N
A1/A2
Y1
Y2
17-18
27-28
37-38
tv
45-46
55-56

Block Diagram

A1(+) A2 S11
Overvoltage - and
2 Time circuit
short circuit strength
release delay
protection
K1t
24V
Power K1t
S21
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.
tv
tv
M10116_b
Y1 Y2 17 27 37 45
K2t
K2t
18 28 38 46
Your advantage
• Easy to realise safe timing circuits
• 4 forcibly guided output contacts at only 22.5 mm width
Features
• According to
- Performance Level (PL) d and category 3 to EN ISO 13849-1
- SIL Claimed Level (SIL CL) 2 to IEC/EN 62061
- Safety Integrity Level (SIL) 2 to IEC/EN 61508 and IEC/EN 61511
when connected to a suitable safety module
• Adjustable time delay
• As option fixed time delay
• High long life stability due to digital time base
• Adjustable with or without cross fault detection
• Output: 3 NO contacts + 1 NC contact + 1 forcibly guided feedback
contact or 4 NO contacts + 1 forcibly guided feedback contact
• LED indicator for channel 1, 2 and operation voltage
• Wire connection: also 2 x 1.5 mm
2 x 2.5 mm solid DIN 46228-1/-2/-3/-4
2
• As option with pluggable terminal blocks for easy exchange of devices
- With screw terminals
- Or with cage clamp terminals
• Width 22.5 mm

Approvals and Markings

Applications

• Delayed disconnection with the possibility for status check of the safety
relays, stop category 1 according to DIN EN 60204-1
• Controlled stop of system parts

Indicators

Upper LED:
Lower LED:

Circuit Diagrams

17 27 37
A1
S11 Y1
(+)
A1 S11 17 27
Y1
K1t
K2t
Y2
55
18 28 38
A2 S21
S21 Y2
A2
18 28 38
K1t
LG 7928.97

Connection Terminals

K2t
Terminal designation
A1 (+)
A2 (-)
S11, S21
Y1, Y2
56
M10221
17, 18, 27, 28, 37, 38, 47, 48
45, 46
55, 56
13
stranded ferruled, or
2
Canada / USA
On, when supply connected
On, when relay K1t and K2t energized
17
45
A1
(+)
55
A1 S11
Y1
37 45 55
K1t
K2t
Y2
A2 S21
56
46
A2
56
M10112
18
46
LG 7928.98
Signal description
+ / L
- / N
Inputs
Outputs
Positive driven NO contacts for
release circuit
Positive guided indicator output
Positive guided feedback circuit
LG 7928 / 29.04.21 en / 390A
27 37 47
S11 Y1 55
17 27 37 47 55
18 28 38 48 56
S21 Y2 56
M10114
28 38 48