SICK GTB20 Serie Instrucciones De Uso página 31

5.2 Notes on UL approval
5.3 Connection notes
8026846.1K1S/2024-02-08 | SICK
Subject to change without notice
UL approval
Table 2: UL approval
G20 products with DC voltage supply and with:
• connector
• cable
• cable with connector
UL:
The device shall be supplied from an isolating
transformer having a secondary overcurrent
protective device that complies with UL 248 to
be installed in the field rated either:
a) max 5 amps for voltages 0 V ~ 20 V (0 V ~
28.3 V peak), or
b) 100 / Vp for voltages of 20 V ~ 30 V (28.3
V ~ 42.4 V peak)
Alternatively, they can be supplied from a
Class 2 voltage supply.
UL Environmental Rating: Enclosure type 1
For use in NFPA 79 Applications only
G20 products with AC voltage supply and with:
•
cable
• cable with connector
UL:
UL Environmental Rating: Enclosure type 1
For use in NFPA 79 Applications only
G20 products with DC and AC/DC voltage sup‐
ply and with:
• terminal chamber: Gxx20x-QK and Gxx20x-
QL
UL:
For use in NFPA 79 Applications only
The sensors must be connected in a voltage-free state. The following information shall
be observed, depending on the connection type:
– Male connector connection: Pin assignment
– Cable: Wire color
– Terminal connection: Pin assignment and the following points
Terminal connection:
1. Untighten the M3 screw on the back cover and remove the back cover.
2. Lead voltage-free supply cable through the 3/8" MPT (Male Pipe Thread) fitting,
spacer, rubber seal (as illustrated below) and the back cover opening in the right
position horizontally or vertically.
3. Tighten the 3/8" MPT (Male Pipe Thread) according to
4. Connect and secure each of the wires to the terminal block with a torque of 0.4 to
0.5 Nm (see table 5, page 33
5. Put the back cover back. Ensure the back cover is free of obstruction and securely
tightened.
OPERATING INSTRUCTIONS
table 3
and table 9).
O P E R A T I N G I N S T R U C T I O N S | GTB20
and table 4.
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