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Summary of Contents for Westermo MA-43
- Page 1 INSTALLATION MANUAL 6043-2202 Galvanic Transient Balanced Isolation Protection Transmission Approved Addressable modem AUDIN - 8, avenue de la malle - 51370 Saint Brice Courcelles Tel : 03.26.04.20.21 - Fax : 03.26.04.28.20 - Web : http: www.audin.fr - Email : info@audin.fr...
- Page 2 AUDIN - 8, avenue de la malle - 51370 Saint Brice Courcelles Tel : 03.26.04.20.21 - Fax : 03.26.04.28.20 - Web : http: www.audin.fr - Email : info@audin.fr...
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Page 3: Specifications
Specifications Transmission Asynchronous, full/half duplex or simplex Interface 1 EIA RS-232-C/ITU-T V.24, 25-position D-sub, female Interface 2 EIA RS-422-A/RS-485/V.11, 5-position screw block Transmission rates Up to 38.4 kbit/s Indicators Power, RD, TD, DCD, CTS, RTS Humidity 0–95% RH, non-condensing Overvoltage protection Mains: Breakdown voltage 440V at 230V AC and 220V at 115V AC Interface 2: Breakdown voltage... - Page 4 Switch settings MA-43 Selection of power supply 115/230V AC S2, S3 Selection of addresses Selection of operation Selection of communication parameters Selection of 2- or 4-wire communication and termination 1 2 3 4 1 2 3 4 5 6 7 8...
- Page 5 1 2 3 4 5 6 Factory settings termination 1 2 3 4 5 6 The MA-43 system has to be terminated and 1 2 3 4 1 2 3 4 5 6 7 8 have a fail-safe function. Fail-safe forces a three stated line to be in the off state.
- Page 6 Any data from single ASCII characters to large binary data files can be transferred through the MA-43. The protocol is flexible so it can fit into many systems. For this reason the addressing protocol is selectable so that data cannot appear as an address to a slave. If just simple character data is going to be exchanged then a simple protocol can be used to save time and complexity.
- Page 7 Untimed address frame The master MA-43 searches for the start sequence and address in the RS-232 data stre- am. When a valid start sequence is detected the next received character is transmitted as an address to all connected slaves. If there is more than one character in the start sequence, there is a time limit between two subsequent start characters.
- Page 8 RS-232 TD signal. The quiet periods has to be at least 10 byte times. After 10 byte times quiet since the last character on the RS-232 TD line the MA-43 master waits for a start character. There is also in this mode a time-limit between cha- racters in the startframe.
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Page 9: Flow Control
RTS/CTS The CTS signal is used to control the data stream from a user to a MA-43. CTS is high when the MA-43 is ready to receive characters. The RTS signal is used to control the data stream from a MA-43 to the user. When the user equipment is ready to receive characters RTS has to be high. - Page 10 MA-43 (address 00), which is the only MA-43 that can act on the test commands. To be able to give test commands the MA-43 has to be in the test mode. Test mode can only be entered directly after power up or reset of the master MA-43.
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Page 11: Address Assignment
Termination The MA-43 system has to be terminated and have a fail safe. The last units on the bus should have termination switched on. The failsafe circuit ensures that when all transmitt- ters are tristated the line can not float and so cause possible false data readings. - Page 12 (cable specifications 0.3 mm and capacitance 42pF/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-43 Master Max 1200 metre/Max 32 connections Max 0.3 metre =Termination MA-43 Slave...
- Page 13 Switch settings MA-43H Master Master Start character Echo 04 (EOT) No echo 1 2 3 4 1 2 3 4 1B (ESC) Echo 1 2 3 4 1 2 3 4 Master Master Mode Result codes Hayes No codes 1 2 3 4 1 2 3 4 S4:1 Result codes...
- Page 14 Connect MA-43 H ATDnnn<CR> n is number from 1 to 126 followed by a CR. Example: To connect to hex address 30, ATD48<CR>. To connect to hex address 2, ATD2<CR>. The modem will reply with CONNECT or NO ANSWER. Disconnect MA-43 H To disconnect, just send +++ and ATH0 or ATH.
- Page 15 AUDIN - 8, avenue de la malle - 51370 Saint Brice Courcelles Tel : 03.26.04.20.21 - Fax : 03.26.04.28.20 - Web : http: www.audin.fr - Email : info@audin.fr...
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Page 16: Block Diagram
ADDRESS Westermo Teleindustri AB have distributors in several countries, contact us for further information. Westermo Teleindustri AB • S-640 40 Stora Sundby, Sweden Phone +46 16 612 00 Fax +46 16 611 80 E-mail: info@westermo.se • Westermo Web site: www.westermo.se...
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