Mean Well DR-RDN20 Installation Manual

 Type： DR-RDN20 DIN rail peripheral
DR-RDN20
 Introduction
DR-RDN20 is a DIN rail peripheral for the redundant module.
Like other Mean Well's DIN series, they can be mounted on a TS35 Standard DIN rail.
 Installation
（1）Always allow good ventilation clearances, 5mm left and right, 40mm above and 20mm below, around the unit
in use to prevent it from overheating. Also a 10-15 cm clearance must be kept when the adjacent device is a
heat source.
（2）The appropriate mounting orientation for the unit is vertical, the TB1 terminals at the bottom. Mounting
orientations other than that, such as upside down, horizontal, or table-top mounting, is not allowed.
（3）Use copper wire only, and recommended wires are shown as below.
AWG
Rated Current of
Equipment (Amp)
Cross-section of
2
Lead(mm )
Note: 1. Current each wire carries should be de-rated to 80% of the current suggested
above when using 5 or more wires connected to the unit.
2. The maximum allowable wire cross-sectional area for the terminal is 10 AWG/
5.3 mm
Make sure that all strands of each stranded wire enter the terminal connection and the screw terminals are
securely fixed to prevent poor contact. If the power supply possesses multi-output terminals, please make
sure each contact is connected to wires to prevent too much current stress on a single contact.
（4）Use wires that can withstand temperatures of at least 80°C, such as UL1007.
（5）Recommended wire strapping length is 5mm (0.197").
（6）Recommended screwdriver is 4mm, slotted type.
（7）The recommended torque setting for terminals is 10kgf-cm(9Lb-in).
Installation Manual
INPUT：A：21-28VDC 20A
B：21-28VDC 20A
18
7A 10A
0.8
2
.
OUTPUT：20A (max)
16 14
15A
1.3 2.1
12 10
20A 30A
3.3 5.3