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DC Filters
Design Guide
The recommended temperature limits for Pt100 sensors are the same as the switching temperatures of the thermal relays.
B+
NXP
CONTROL
OPT-BH
U
θ
θ
Illustration 4: DC Filter Wiring Diagrams with PT100 (Left) and Thermal Relays (Right)
The thermal sensors are connected to 4 mm
Pt100 temperature sensors:
•
Connected between terminals 1 and 2.
Thermal relays:
•
Alarm signal connected to terminals 1 and 2.
•
Fault signal connected to terminals 3 and 4.
Illustration 5: Terminals for Thermal Protection
5.3 Mounting
The DC filter is typically mounted inside a cabinet next to the DC/DC converter. If there is not enough space for the side-by-side
mounting, install the inductors on top of each other. See the example in
inductors.
Note: In any environment where vibration is present, mount the filters with top and bottom clamps for reliable installation.
The distance from the cabinet walls to the inductors must be at least 20 mm.
14 | Danfoss A/S © 2023.01
B-
V
W
θ
2
feedthrough terminals.
1 2 3 4
B+
NXP
CONTROL
DI
U
θ
θ
ALARM
ALARM
θ
θ
FAULT
FAULT
Illustration
6. Use the lifting eyes or holes to mount the
Installation Guidelines
B-
V
W
θ
ALARM
θ
FAULT
AJ377845348678en-000101 / 172F4785
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