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What are the safety recommendations before installing the WESTERMO SDW-541-MM-SC2?
Before installation of the WESTERMO SDW-541-MM-SC2, you should:
Read this manual completely and gather all information on the unit. Make sure that you understand it fully. Check that your application does not exceed the safe operating specifications for this unit.
This unit should only be installed by qualified personnel.
This unit should be built-in to an apparatus cabinet, or similar, where access is restricted to service personnel only.
The power supply wiring must be sufficiently fused, and if necessary it must be possible to disconnect manually from the power supply. Ensure compliance to national installation regulations.
This unit uses convection cooling. To avoid obstructing the air flow around the unit, follow the spacing recommendations (see Installation section).
What are the safety warnings before mounting, using or removing the WESTERMO SDW-541-MM-SC2?
Before mounting, using or removing the WESTERMO SDW-541-MM-SC2 you should:
Prevent access to hazardous voltage by disconnecting the unit from power supply.
Warning! Do not open connected unit. Hazardous voltage may occur within this unit when connected to power supply.
What are the care recommendations for the WESTERMO SDW-541-MM-SC2?
Follow the care recommendations below to maintain full operation of unit and to fulfil the warranty obligations.
This unit must not be operating with removed covers or lids.
Do not attempt to disassemble the unit. There are no user serviceable parts inside.
Do not drop, knock or shake the unit, rough handling above the specification may cause damage to internal circuit boards.
Do not use harsh chemicals, cleaning solvents or strong detergents to clean the unit.
Do not paint the unit. Paint can clog the unit and prevent proper operation.
Do not expose the unit to any kind of liquids (rain, beverages, etc). The unit is not waterproof. Keep the unit within the specified humidity levels.
Do not use or store the unit in dusty, dirty areas, connectors as well as other mechanical part may be damaged.
Fibre connectors are supplied with plugs to avoid contamination inside the optical port. As long as no optical fibre is mounted on the connector, e.g. for storage, service or transportation, should the plug be applied.
What special treatment is needed for Fibre Optic Handling on the WESTERMO SDW-541-MM-SC2?
Fibre optic equipment needs special treatment. It is very sensitive to dust and dirt. If the fibre will be disconnected from the modem the protective hood on the transmitter/receiver must be connected. The protective hood must be kept on during transportation. The fibre optic cable must also be handle the same way.
How should optical connectors on the WESTERMO SDW-541-MM-SC2 be cleaned?
In the event of contamination, the optical connectors should be cleaned by the use of forced nitrogen and some kind of cleaning stick.
Recommended cleaning fluids:
- Methyl-, ethyl-, isopropyl- or isobutyl-alcohol
- Hexane
- Naphtha
What maintenance is required for the WESTERMO SDW-541-MM-SC2?
No maintenance is required, as long as the unit is used as intended within the specified conditions.
What are the isolation conditions between interfaces for the WESTERMO SDW-541-MM-SC2?
| Isolation between interfaces | |
| Power Interface to all other | 2.8 kV DC 2.0 kV RMS @ 50 Hz and 60 s duration |
| TX signal Interface to all other | 2.1 kV DC 1.5 kV RMS @ 50 Hz and 60 s duration |
| TX shield Interface to all other | 1.5 kV DC 1.0 kV RMS @ 50 Hz and 60 s duration |
What are the environmental conditions for the WESTERMO SDW-541-MM-SC2?
| Environmental | |
| Temperature, operating | -25 to +65°C (SDW-541) |
| Temperature, storage and transportation | -25 to +70°C |
| Relative humidity, operating | 5 to 95% (non-condensing) |
| Relative humidity, storage and transportation | 5 to 95% (condensation allowed outside packaging) |
| Altitude, operating | 2000 m/70 kPa |
What are the mechanical specifications for the WESTERMO SDW-541-MM-SC2?
| Mechanical | |
| Dimension (W x H x D) | 35 x 121 x 119 mm |
| Weight | 0.2 kg |
| Mounting | DIN-rail |
| Degree of protection | IP21 |
How is the WESTERMO SDW-541-MM-SC2 configured?
Auto configured (auto-negotiation) or manually setting of speed and duplex of individual TX port, by DIP-switches.
Port mirror function is possible to set with DIP-switch. With the port mirror function active the switch will copy all outgoing traffic to port 1. This can be used to monitor all traffic going out from the switch. Packets may be discarded if the total throughput exceeds the port speed of port 1.
What is the fibre optic power budget for the WESTERMO SDW-541-MM-SC2?
| Model | Multimode MM-xx2 |
| Transmitted wavelength | 1310 nm |
| Min. output power, transmitter | -19 dBm |
| Max. output power, transmitter | -12 dBm |
| Input sensitivity, receiver | -31 dBm |
| Min. power budget | 12 dBm |
| Max. power budget | 19 dBm |
| Recommended fibre cable and core / cladding diameter | 50/125 62.5/125 |
What is the normal attenuation in connectors and splices for the WESTERMO SDW-541-MM-SC2?
| Type | Normal attenuation |
| Connector | 0.2 – 0.4 dBm |
| Fusion splice | 0.1 dBm |
| Mechanical splice | 0.2 dBm |
What are the power interface specifications for the WESTERMO SDW-541-MM-SC2?
| Power SDW-500 series | |
| Rated voltage | 12 – 48 VDC, polarity protected |
| Operating voltage | 9.6 – 57.6 VDC |
| Rated current (@12VDC power input) | 450 mA (SDW-541-MM-SC2) |
| Rated frequency | DC |
| Connection | Detachable screw terminal |
| Connector size | 0.2 – 2.5 mm² (AWG 24-12) |
What are the Ethernet TX interface specifications for the WESTERMO SDW-541-MM-SC2?
| Ethernet TX | |
| Electrical specification | IEEE std 802.3. 2000 edition |
| Data rate | 10 Mbit/s or 100 Mbit/s, manual or auto |
| Duplex | Full or half, manual or auto |
| Connection | SC, ST or LC |
| Circuit type | Optical |
| Transmission range | 100 m |
What are the Ethernet FX interface specifications for the WESTERMO SDW-541-MM-SC2?
| Ethernet FX | |
| Electrical specification | IEEE std 802.3. 2000 edition |
| Data rate | 10 Mbit/s or 100 Mbit/s, manual or auto |
| Duplex | Full or half, manual or auto |
| Connection | SC, ST or LC |
| Circuit type | Optical |
| Transmission range | 100 m |
How is Power connected to the WESTERMO SDW-541-MM-SC2?
The WESTERMO SDW-541-MM-SC2 supports redundant power connection. The positive input are +VA and +VB, the negative input for both supplies are COM. The power is drawn from the input with the highest voltage.
Power connection using the 3-pos screw terminal:
| 3-pos screw terminal | Description | Power |
| 1 | COM | 0V |
| 2 | +VA | A: 9.6 – 57.6 VDC |
| 3 | +VB | B: 9.6 – 57.6 VDC |
What are the connection details for the Ethernet TX (RJ-45) interface on the WESTERMO SDW-541-MM-SC2?
Ethernet TX connection (RJ-45 connector), automatic MDI/MDI-X crossover.
| Contact | Signal Name | Direction | Description/Remark |
| 1 | TD+ | In/Out | Transmitted/Received data |
| 2 | TD- | In/Out | Transmitted/Received data |
| 3 | RD+ | In/Out | Transmitted/Received data |
| 4 | — | — | — |
| 5 | — | — | — |
| 6 | RD- | In/Out | Transmitted/Received data |
| 7 | — | — | — |
| 8 | — | — | — |
| Shield | — | — | HF-connected |
CAT 5 cable is recommended. Unshielded (UTP) or shielded (STP) connector might be used.
How does the FX SC Multi- or single mode connection work on the WESTERMO SDW-541-MM-SC2?
The FX SC Multi- or single mode connection is an Ethernet FX connection.
It uses 1300 nm multi- or singlemode fibre transceiver with SC-connector.
The dust protection plug shall be mounted when no fibre is connected.
How does the FX ST Multi mode connection work on the WESTERMO SDW-541-MM-SC2?
The FX ST Multi mode connection is an Ethernet FX connection.
It uses 1300 nm multi mode fibre transceiver with ST-connector.
The dust protection plugs shall be mounted when no fibre is connected.
How does the FX LC Multi- or single mode connection work on the WESTERMO SDW-541-MM-SC2?
The FX LC Multi- or single mode connection is an Ethernet FX connection.
It uses 1300 nm singlemode fibre transceiver with LC-connector.
The dust protection plug shall be mounted when no fibre is connected.
What are the LED indicators on the WESTERMO SDW-541-MM-SC2 and what do they indicate?
At power on the PWR flashes during initialising.
Indicators (LED) are Power (PWR), Link (LINK) of every port, and Speed (SPD) and duplex (DPX) of TX ports.
| LED | Status | Indication of |
| PWR | ON | Internal power, initialising OK |
| Slow flash | Initialisation progressing | |
| Fast flash | Initialisation error | |
| LINK | OFF | No Ethernet link |
| ON | Good Ethernet link | |
| Flash | Ethernet data is transmitted or received, traffic indication | |
| SPD (TX only) | OFF | 10 Mbit/s |
| ON | 100 Mbit/s | |
| DPX (TX only) | OFF | Half duplex |
| ON | Full duplex |
What is the warning regarding internal electronics and ESD when accessing the DIP switches on the WESTERMO SDW-541-MM-SC2?
Warning! Prevent damage to internal electronics from electrostatic discharges (ESD) by discharging your body to a grounding point (e.g. use of wrist strap), before the lid on top/front of the unit is removed.
What must be observed regarding connected equipment when accessing the DIP switches on the WESTERMO SDW-541-MM-SC2?
Warning! Do not open connected equipment. Prevent access to hazardous voltages by disconnecting the unit from AC/DC mains supply and all other electrical connections.
When do DIP-switch settings configure the WESTERMO SDW-541-MM-SC2?
When configuration via DIP-switches, the settings of DIP-switches configure the unit only after a reboot (power off/on).
What must be observed when configuring the DIP-switches on the WESTERMO SDW-541-MM-SC2?
The following must be observed when the DIP-switches will be configured:
Speed and duplex setting only valid when auto-negotiation is disabled.
When monitoring selected all outgoing packets from the switch is also copied to the port 1.
Speed and duplex switch settings are ignored for FX ports.
If auto-negotiation and auto MDI/MDI-X disabled all TX ports support MDI-X configuration.
How are the DIP switches set for Port 1 Auto-negotiation and auto MDI/MDI-X disabled on the WESTERMO SDW-541-MM-SC2?
S1 switches for Port 1:
ON
■ ■ ■ ■ ■ ■ ■ ■
1 2 3 4 5 6 7 8
How are the DIP switches set for Port 1 Auto-negotiation and auto MDI/MDI-X enabled on the WESTERMO SDW-541-MM-SC2?
S1 switches for Port 1:
ON
■ ■ ■ ■ ■ ■ ■ ■
1 2 3 4 5 6 7 8
How are the DIP switches set for Port 1 10 Mbit/s speed selected on the WESTERMO SDW-541-MM-SC2?
S1 switches for Port 1:
ON
■ ■ ■ ■ ■ ■ ■ ■
1 2 3 4 5 6 7 8
How are the DIP switches set for Port 1 100 Mbit/s speed selected on the WESTERMO SDW-541-MM-SC2?
S1 switches for Port 1:
ON
■ ■ ■ ■ ■ ■ ■ ■
1 2 3 4 5 6 7 8
How are the DIP switches set for Port 1 Half duplex selected on the WESTERMO SDW-541-MM-SC2?
S1 switches for Port 1:
ON
■ ■ ■ ■ ■ ■ ■ ■
1 2 3 4 5 6 7 8
How are the DIP switches set for Port 1 Full duplex selected on the WESTERMO SDW-541-MM-SC2?
S1 switches for Port 1:
ON
■ ■ ■ ■ ■ ■ ■ ■
1 2 3 4 5 6 7 8
How are the DIP switches set for Port 2 Auto-negotiation and auto MDI/MDI-X disabled on the WESTERMO SDW-541-MM-SC2?
S1 switches for Port 2:
ON
■ ■ ■ ■ ■ ■ ■ ■
1 2 3 4 5 6 7 8
How are the DIP switches set for Port 2 Auto-negotiation and auto MDI/MDI-X enabled on the WESTERMO SDW-541-MM-SC2?
S1 switches for Port 2:
ON
■ ■ ■ ■ ■ ■ ■ ■
1 2 3 4 5 6 7 8
How are the DIP switches set for Port 2 10 Mbit/s speed selected on the WESTERMO SDW-541-MM-SC2?
S1 switches for Port 2:
ON
■ ■ ■ ■ ■ ■ ■ ■
1 2 3 4 5 6 7 8
How are the DIP switches set for Port 2 100 Mbit/s speed selected on the WESTERMO SDW-541-MM-SC2?
S1 switches for Port 2:
ON
■ ■ ■ ■ ■ ■ ■ ■
1 2 3 4 5 6 7 8
How are the DIP switches set for Port 2 Half duplex selected on the WESTERMO SDW-541-MM-SC2?
S1 switches for Port 2:
ON
■ ■ ■ ■ ■ ■ ■ ■
1 2 3 4 5 6 7 8
How are the DIP switches set for Port 2 Full duplex selected on the WESTERMO SDW-541-MM-SC2?
S1 switches for Port 2:
ON
■ ■ ■ ■ ■ ■ ■ ■
1 2 3 4 5 6 7 8
How are the DIP switches set for Port 3 Auto-negotiation and auto MDI/MDI-X disabled on the WESTERMO SDW-541-MM-SC2?
S1 switches for Port 3:
ON
■ ■ ■ ■ ■ ■ ■ ■
1 2 3 4 5 6 7 8
How are the DIP switches set for Port 3 Auto-negotiation and auto MDI/MDI-X enabled on the WESTERMO SDW-541-MM-SC2?
S1 switches for Port 3:
ON
■ ■ ■ ■ ■ ■ ■ ■
1 2 3 4 5 6 7 8
How are the DIP switches set for Port 3 10 Mbit/s speed selected on the WESTERMO SDW-541-MM-SC2?
S1 switches for Port 3:
ON
■ ■ ■ ■ ■ ■ ■ ■
1 2 3 4 5 6 7 8
How are the DIP switches set for Port 3 100 Mbit/s speed selected on the WESTERMO SDW-541-MM-SC2?
S1 switches for Port 3:
ON
■ ■ ■ ■ ■ ■ ■ ■
1 2 3 4 5 6 7 8
How are the DIP switches set for Port 3 Half duplex selected on the WESTERMO SDW-541-MM-SC2?
S2 switches for Port 3:
ON
■ ■ ■ ■ ■ ■ ■ ■
1 2 3 4 5 6 7 8
How are the DIP switches set for Port 3 Full duplex selected on the WESTERMO SDW-541-MM-SC2?
S2 switches for Port 3:
ON
■ ■ ■ ■ ■ ■ ■ ■
1 2 3 4 5 6 7 8
How are the DIP switches set for Port 4 Auto-negotiation and auto MDI/MDI-X disabled on the WESTERMO SDW-541-MM-SC2?
S2 switches for Port 4:
ON
■ ■ ■ ■ ■
1 2 3 4 5
How are the DIP switches set for Port 4 Auto-negotiation and auto MDI/MDI-X enabled on the WESTERMO SDW-541-MM-SC2?
S2 switches for Port 4:
ON
■ ■ ■ ■ ■
1 2 3 4 5
How are the DIP switches set for Port 4 10 Mbit/s speed selected on the WESTERMO SDW-541-MM-SC2?
S2 switches for Port 4:
ON
■ ■ ■ ■ ■
1 2 3 4 5
How are the DIP switches set for Port 4 100 Mbit/s speed selected on the WESTERMO SDW-541-MM-SC2?
S2 switches for Port 4:
ON
■ ■ ■ ■ ■
1 2 3 4 5
How are the DIP switches set for Port 4 Half duplex selected on the WESTERMO SDW-541-MM-SC2?
S2 switches for Port 4:
ON
■ ■ ■ ■ ■
1 2 3 4 5
How are the DIP switches set for Port 4 Full duplex selected on the WESTERMO SDW-541-MM-SC2?
S2 switches for Port 4:
ON
■ ■ ■ ■ ■
1 2 3 4 5
How are the DIP switches set for Port mirroring, No monitoring selected on the WESTERMO SDW-541-MM-SC2?
S2 switches for Port mirroring:
ON
■ ■ ■ ■ ■
1 2 3 4 5
How are the DIP switches set for Port mirroring, Monitoring selected on the WESTERMO SDW-541-MM-SC2?
S2 switches for Port mirroring:
ON
■ ■ ■ ■ ■
1 2 3 4 5
How are the DIP switches set for Factory settings on the WESTERMO SDW-541-MM-SC2?
S1 switches for Factory settings:
ON
■ ■ ■ ■ ■ ■ ■ ■
1 2 3 4 5 6 7 8
S2 switches for Factory settings:
ON
■ ■ ■ ■ ■
1 2 3 4 5
How is the WESTERMO SDW-541-MM-SC2 mounted?
This unit should be mounted on 35 mm DIN-rail which is horizontally mounted on a wall or cabinet backplate. This unit uses convection cooling. To avoid obstructing the airflow around the unit, use the following spacing rules. Recommended spacing 25 mm (1.0 inch) above/below and 10 mm (0.4 inches) left/right the unit. Snap on mounting.
How is the WESTERMO SDW-541-MM-SC2 removed?
Press down the black support at the back of the unit.
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