DLM4500 Industrial Dial-up/Leased Line Extended Temperature Modem
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DLM4500 voice band modem offers maximum versatility and reliability in remote process control and data acquisition. From Dial-up, leased and private line applications, the DLM4500provides unsurpassed flexibility in any industrial application requiring extended temperatures.
The DLM4500 uses advanced Trellis coding, error correction and data compression technology for virtually error-free data communications. An uncompressed PLC line speed of up to 19.2 Kbaud is standard; however, port baud rates of 1200through 115.2 K are also available.
The DLM4500 operates full/half-duplex on two wires. The asynchronous digital interface can be either RS232/422 or AE485*. The DLM4500 autoanswerAE485* version easily provides long distance polling of multiple PLCs at a remote site. The polling operation performed by the Master is completely transparent to the DLM4500. No additional Master programming is required simply enter the Remote DLM4500 telephone number.
Housed in a rugged steel enclosure for optimal EMI resistance, the DLM4500 series is factory configured for trouble-free installation. No programming or configuration is required.
Auto Alarm Dial Back
An Auto Alarm Dial Back module is available on theDLM4500. This gives the remote PLC the ability to establish a data path to a master PLC or PC via a logic input from the remote PLC to the Auto Alarm Dial Back module. This could be used for remote alarming or time based data updates.
(file size 552K) a printable pdf version of the Data Sheet for the DLM4500 Dial-up/Leased line extended temperature modem. (Requires Adobe Acrobat Reader to open.)
See also Technical Services > Engineering Specifications > DLM4500-Dial-up
DLM4500 Series Specifications
Ringer Equivalence 0.30B
Carrier Trellis Coded Modulation (TCM) 1700 or 1800 Hz
Modem Data Rate
DTE Speeds Supported
Specifications subject to change without notice.
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