The Westermo TD-33 is an industrial PSTN modem. The modem has been developed to be used in industrial applications and has features that would not be found in a normal modem.
The TD-33 is approved for use across the European Union and USA. The modem is ideal for use with PLC’s with its DIN rail mounting and 12–36 V DC power requirements. The TD-33 has been tested with most major brands of PLC and application sheets are available.
Terminal data rates of up to 230.4 kbit/s are supported using standard data compression and error correction algorithms. The maximum line modulation speed is 33.6 kbit/s connected to another TD-33 or standard modem. The TD-33/V.90 supports the V.90 and K56flex™ modulation techniques so can be used to achieve modulation speeds of up to 56 kbit/s if connecting to an ISP.
A watchdog facility continually monitors the power supply and internal hardware. In the event of a problem the modem automatically resets. This feature has been included to make the unit more suitable for use in unmanned locations.
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V34 33.6 kbit/s, V.90/K56flex 8482; 56 kbit/s |
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Terminal data rates up to 230.4 kbit/s |
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RS-232/V.24 on 9-pos. D-sub |
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Watchdog function |
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2-wire dial up |
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Galvanic isolation and transient protection against PSTN |
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Supports 11 bit protocols |
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DC powered 12 8211;36 V |
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35 mm DIN-rail housing |
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