EUCHNER CTM-LBI-BR Unicode Series - Notes about; Safety in Case of Faults; Fuse Protection for Power Supply

13
2525462-01-01/20 (Translation of the original operating instructions)
Operating Instructions
Transponder-Coded Safety Switch CTM-LBI-BR
EN
9.1. Notes about
Important!
Ì For use and operation as per the requirements
1)
, a power supply with the feature “for use in
Class 2 circuits” must be used.
Alternative solutions must comply with the following requirements:
Electrically isolated power supply unit in combination with fuse as per UL248. This fuse should be
designed for max. 3.3A and should be integrated into the 30VDC voltage section.
Ì For use and applications as per the requirements
1)
, a connecting cable listed under UL cate-
gory code CYJV/7, min. 24AWG, min. 80°C, must be used.
1) Note on the scope of the UL approval: The devices have been tested as per the requirements of UL508 and CSA/C22.2 no. 14 (protection against electric shock
and re).
9.2. Safety in case of faults
Ì The operating voltage UB and the control input IMP are reverse polarity protected.
Ì The safety outputs FO1A/FO1B are short circuit-proof.
Ì A short circuit between FO1A and FO1B is detected by the switch.
Ì A short circuit in the cable can be excluded by laying the cable with protection.
9.3. Fuse protection for power supply
The power supply must be provided with fuse protection depending on the number of switches and current required for the
outputs. The following rules apply:
Max. current consumption of an individual switch I
max
I
max
= I
UB
+ I
FO1A
+
FO1B
+ I
OL
+ I
OD
+ I
IMP
I
UB
= Switch operating current (max. 500mA)
I
OL
/I
OD
= Load current of monitoring outputs (max. 50mA per monitoring output)
I
FO1A+FO1B
= Load current of safety outputs FO1A + FO1B (2 x max. 150mA)
Max. current consumption of a switch chain Σ I
max
Σ I
max
= I
FO1A+FO1B
+ nx(I
UB
+ I
OL
+ I
OD
)
n = Number of connected switches