6
Electrical installation
Installation instructions for fieldbus interfaces, field distributors
Manual – PROFINET IO Interfaces, Field Distributors
47
6.2.10
UL-compliant installation
INFORMATION
Due to UL requirements, the following chapter is always printed in English independ-
ent of the language of the documentation.
Field wiring power terminals
Observe the following notes for UL-compliant installation:
•
Use 60/75 °C copper wire only.
•
Tighten terminals to 1.5 Nm (13.3 lb.in)
Short circuit current rating
Suitable for use on a circuit capable of delivering not more than 200,000 rms sym-
metrical amperes when protected as follows
For 240 V systems:
250 V minimum, 25 A maximum, non-semiconductor fuses
or 250 V minimum, 25 A maximum, inverse time circuit breakers
For 500 V systems:
500 V minimum, 25 A maximum, non-semiconductor fuses
or 500 V minimum, 25 A maximum, inverse time circuit breakers
The max. voltage is limited to 500 V.
Branch circuit protection
Integral solid state short circuit protection does not provide branch circuit protection.
Branch circuit protection must be provided in accordance with the National Electrical
Code and any additional local codes.
For maximum branch circuit protection see table below.
Series
non-semiconductor fuses
inverse time circuit breaker
MOVIMOT
®
MM..D
250 V/500 V minimum,
25 A maximum
250 V/500 V minimum,
25 A maximum
Motor overload protection
MOVIMOT
®
MM..D is provided with load and speed-sensitive overload protection and
thermal memory retention upon shutdown or power loss.
The trip current is adjusted to 140 % of the rated motor current.
Ambient temperature
MOVIMOT
®
MM..D is suitable for an ambient temperature of 40 °C, max. 60 °C with
derated output current. To determine the output current rating at higher than 40 °C,
the output current should be derated 3.0 % per °C between 40 °C and 60 °C.
•
Only use certified units with a limited output voltage (V
max
= DC 30 V) and limited
output current (I ≤ 8 A) as an external DC 24 V voltage source.
•
The UL certification only applies for the operation on voltage supply systems with
voltages to ground of max. 300 V. The UL-certification does not apply to operation
on voltage supply systems with a non-grounded star point (IT systems).
22870857/EN – 12/2016