SICK deTec4 Core Ex - Minimum Wire Cross-Section for Protection Earth (PE)

DANGER
Ris
k of ignition or explosion
b
Each connection to the protection earth (PE) on the explosion-proof enclosure
must use at least one wire with a cross-section meeting the requirements of the
table below.
Table 3: Minimum wire cross-section for protection earth (PE)
Wire cross-section of outer cable S Minimum wire cross-section of the corre‐
spondin
g protection earth wire S
P
S ≤ 16 mm
2
S
16 mm
2
< S
≤ 35 mm
2
16 mm
2
S > 35 mm
2
0.5 S
DANGER
Ris
k of ignition
Failure to observe this information could result in a risk of ignition.
Only if the device is used in North America:
b
Any conduit openings that are not in use must be sealed. Sealing fittings must turn
at least five (5) full revolutions and be at least 3.175 mm thick (1/8 of an inch).
b
Conduit sealing fittings must be applied in each installed conduit run (located a
maximum of 457 mm (18 inches) away from the explosion-proof enclosure) in
order to comply with the provisions of the most recent version of the National Elec‐
trical Code, Article 501.15 and/or 502.15, and all other applicable regulations.
DANGER
H
azard due to electrical voltage
Hazard due to unexpected starting of the machine
b
Make sure that the machine is (and remains) disconnected from the voltage sup‐
ply during the electrical installation.
b
Make sure that the dangerous state of the machine is (and remains) switched off
during electrical installation.
b
Make sure that the outputs of the safety light curtain have no effect on the
machine during the electrical installation work.
b
Use an appropriate voltage supply, see "Technical data", page 60.
DANGER
H
azard due to lack of effectiveness of the protective device
The dangerous state may not be stopped in the event of non-compliance.
b
Always connect the two OSSDs separately. The two OSSDs must not be connected
to each other.
b
Connect the OSSDs such that the machine controller processes both signals sepa‐
rately.
DANGER
H
azard due to lack of effectiveness of the protective device
The dangerous state may not be stopped in the event of non-compliance.
b
Prevent the formation of a potential difference between the load and the protec‐
tive device.
6 ELECTRICAL INSTALLATION
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O P E R A T I N G I N S T R U C T I O N S | deTec4 Core Ex 8017023/14Q6/2020-04-27 | SICK
Subject to change without notice