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DLM4000 User Guide
PN 161-09997-003A
Feb 2005
DLM4000 Operation Instructions
The DLM4000 has some requirements, which need to be met for proper operation and communication.
1. The standard DLM4000 modem requires 9 VAC and the 24V version requires 24 VDC.
2. The minimal current requirement for this modem is 300 mA.
3. This modem uses a 10-bit word format only. Below is a table of reference to understand the data formats supported.
4. When using the DLM4000 on a leased line, there are some specifications to note. The leased line must be an analog
voice grade line or unshielded twisted pair, and must be two wire. The DLM4000 will not work on a digital line.
5. The DLM4000 is an asynchronous modem and therefore will not operate directly with synchronous protocols.
6. Handshaking lines such as DTR and RTS are not required for this modem and are ignored per the standard
configuration.
7. Error correction and compression are disabled in the standard configuration. Enabling these options may make
connecting with a PLC impossible.
8. To change modem mode or configuration, see modem setup on page 10.
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