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Summary of Contents for Westermo MA-45 DC
- Page 1 INSTALLATIONSANVISNING INSTALLATION MANUAL INSTALLATIONS ANLEITUNG 6045-2001 Galvanic Transient Balanced Isolation Protection Transmission Approved Omvandlare, RS-232 – RS-422/485 Converter, RS-232 – RS-422/485 RS-232 – RS-422/485 Wandler www.westermo.se...
- Page 2 Specifications MA-45 Transmission Asynchronous, full/half duplex or simplex Interface 1 EIA RS-232-C/ITU-T V.24 25-position D-sub female, DCE Interface 2 EIA RS-422/RS-485/ITU-T V.11 Data rate Up to 115.2 kbit/s Indicators Power, RD, CTS, RTS, TD Insulation Galvanic insulation with opto-coupler (data transmission) and transformer (supply) Insulation voltage 1 500 V...
- Page 3 Switch settings The MA-45 can through different switch settings be adapted to a variety of running conditions. To set the switches, open the plastic case with e.g. a screw-driver. DANGER! DO NOT OPEN CONNECTED UNIT LINE V.24/RS-232-C CONNECTION CONNECTION 1 2 3 4 5 Selection of data rate 1 200 bit/s 1 2 3 4 5 6 7 8...
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Page 4: Factory Settings
2/4-wire transmission Terminering with fail-safe 2-wire 1 2 3 4 5 6 7 8 Terminated (4-wire) 1 2 3 4 4-wire Terminated (2-wire) 1 2 3 4 5 6 7 8 1 2 3 4 No termination 1 2 3 4 Data control by data flow or RTS-control The fail-safe function forces the signal state of the... - Page 5 Connections Line connection (5-Position screw-terminal) Direction Connection ITU-T V.11 Description Receiver A’ (R+) Receiver B’ (R-) Transmitter A (T+) Transmitter B (T-) Shield The definations R+/R–, T+/T– can be various between different manufactures. Terminal connection (DCE) (RS-232-C/V.24, 25-Position D-sub, female) Direction Connection ITU-T V.24...
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Page 6: Specifications
(cable specifications 0.3 mm and capacitance 42 pF/m). The transmission range will increase if a cable with lower capacitance and larger diameter is used. Use shielded cable in heavy industrial environments. MA-45 DC Specifications 12–36 V DC Power supply Power consumption... - Page 7 When a system is installed it should form a bus structure (see diagrams). Star shaped networks should never be created, there are other Westermo products designed to work in star net applications. To install correctly, an RS-422/485 network should be terminated at the correct points.
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Page 8: Block Diagram
Power Insulated power supply 115V supply Switch Westermo Teleindustri AB • SE-640 40 Stora Sundby, Sweden Phone +46 16 42 80 00 Fax +46 16 42 80 01 E-mail: info@westermo.se • Westermo Web site: www.westermo.se Subsidiaries Westermo Data Communications Ltd Westermo Data Communications S.A.R.L.
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