Lantronix
SISGM1040-284-LRT Install Guide
33808 Rev. E
35
Power Supply Installation
Each power supply is a DIN rail power supply with a 150% peak load capability (3 seconds) and high efficiency of
up to 94%. They can be mounted on a TS35 Standard DIN rail.
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 input terminals at the bottom and output on
the top. 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 as shown below.
AWG
18
16
14
12
10
Rated Current of Equipment
(Amps)
6A
6-10A
13-16A
16-25A
25-32A
Cross-section of Lead (mm
2
)
0.75
1.00
1.5
2.5
4
Note 1. Current: each wire should be de-rated to 80% of the current suggested above when using 5 or more
wires connected to the unit.
Note 2: The maximum allowable wire cross-sectional area for the terminal of
the SDR-75
is 12AWG/2.5 mm
2
.
4) 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.
5
）
Use wires that can withstand temperatures of at least 80
°
C, such as UL1007.
6
）
Recommended wire strapping length is 5mm (0.197”).
7
）
Recommended screwdriver is 4mm, slotted type.
8
）
The recommended torque setting for terminals is:
□
SDR-120-24 I/P = 6.3 kgf-cm (5.5 Lb-in) and O/P = 8 kgf-cm (7 Lb-in)
□
SDR-240-48 I/P = 5 kgf-cm (4.4 Lb-in) and O/P = 8 kgf-cm (7 Lb-in)
9
）
Suggested fuse and maximum number of the SDR PSUs that can be connected to a circuit breaker at 230V
are:
□
SDR-120-24 Fuse = T4A/L250V, C16 = 7, D16 = 14.
□
SDR-240-48 Fuse = T5A/L250V, C16 = 4, D16 = 8.
10) Adjust the power supply output voltage if the switch won’t power up.