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Orig. 01
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2021-11-16
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www.bernstein.eu
SMART T-Connector with DCD
SEU-1/0-T45 Series
2.6 Checkout
At machine set up, a Designated Person
2)
should test each safety point for proper machine shutdown response. A
Designated Person should check the safety point for proper operation, physical damage, button looseness, and exces-
sive environmental contamination. This should take place on a periodic schedule determined by the user, based on the
severity of the operating environment and the frequency of switch actuations.
Adjust, repair, or replace components as needed. If inspection reveals contamination on the switch, thoroughly clean
the switch and eliminate the cause of the contamination. Replace the switch and/or appropriate components when any
parts or assemblies are damaged, broken, deformed, or badly worn; or if the electrical/mechanical specifications (for the
environment and operating conditions) have been exceeded.
Always test the control system for proper functioning under machine control conditions after performing maintenance,
replacing the safety point, or replacing any component of the device.
WARNING:
• Safety devices with OSSDs and without DCD, such as safety light curtains, are not compatible.
• Failure to follow these instructions could result in serious injury or death.
• Do not use safety devices with OSSDs and without DCD in a series connection of multiple DCD
• devices.
WARNING:
• Safety devices with solid-state OSSDs are not acceptable Input Devices
• Failure to follow these instructions could result in serious injury or death.
• Only use safety devices with two normally closed (NC) contacts as input devices to the SEU-1/0-T45-....
0
0
20
40
60
80
100
120
140
160
4
8
12
16
20
24
28
32
Max. T
otal Series Cable (m)
Number of DCD Devices
Max. Total Series Cable (m)
Single Power Supply
SRF
SEU-3 / 4
Figure 7. Maximum total cable length for a single power supply
The SEU-1/0-T45-... has a similar current demand to the SRF sensors.
2
)
A Designated Person is identified in writing by the employer as being appropriately trained to perform a specified checkout procedure. A Quali-
fied Person possesses a recognized degree or certificate or has extensive knowledge, training, and experience to solve problems relating to the
emergency stop installation.
