Operator Terminal System Manual - 11276916.pdf

4.2 UL compliant installation
System Manual – DOP11A Operator Terminals
Installation
UL compliant installation
Note the following points for UL compliant installation:
Use only copper conductors with a temperature range of 60 / 75 °C as connection
cables.
4.3 Connection of basic unit DOP11A-10 to DOP11A-50
Voltage supply
Electrical connection according to the methods described in class 1, paragraph 2 (article
501-4(b) according to National Electric Code NFPA70).
Use only tested units with a limited output voltage (V max = DC 30 V) limited output
current (I ≤ 8 A) as an external DC 24 V voltage source.
UL certification does not apply to operation in voltage supply systems with a nonearthed
star point (IT systems).
Ensure correct polarity when connecting the terminal. Incorrect polarity will damage the
unit.
Make sure that the operator terminal and the controller system have the same electrical
grounding (reference voltage value). Communication errors may occur if this is not the
case.
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