Westermo SDI-5xx - Manual (Page 2)

Power Inputs
Alarm V- V+
SDI-550/541 Industrial Ethernet Switch, conforming IEEE 802.3 and 802.3u standard, supports 5
10/100Base TX (SDI-550) or 4 10/100TX plus one 100FX Ethernet port(SDI-541). SDI-550/541
adopts slim industrial design to save rail space of compact system requirement. In order to survive
under harsh environment, SDI-550/541 chooses industrial-grade aluminum case with IP31 standard
protection.
It provides one relay output to alarm port break events, which is enabled/ disabled by the dip switch.
SDI-550/541 is recommended to be powered by DC24V (18~32V) or AC18V (18~27V) from the
terminal block.
Package Check List
Unpack the box, you will find


SDI-550/541 Switch


Quick Installation Guide
Mounting the Unit


Din-Rail mount: Mount the din-rail clip screwed on the rear
of SDI-550/541 on the DIN rail.
Grounding SDI-550/541 Switch
There is one grounding screw on the bottom side of
SDI-550/541. Connect the frame grounding of switch
to the grounding surface to ensure safety and prevent noise
Wiring the Power Inputs
1. Insert the positive and negative wires into the V+ and V-
contact on the terminal block connector
2. Tighten the wire-clamp screws to prevent the DC wires
from being loosened.
Notes: The recommended working voltage is
DC24V (DC18~ 32 V) or AC18V (18~27V)
Introduction
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