User guide

DLM4100 User’s Manual
P/N 161-09977-001B
3
Indicators
There are four LED’s displayed out the front panel for status and diagnostics they are as follows:
(P) Power Red On indicates that the board is receiving power
(C) Carrier Amber On indicates that a connection has been made to another DLM4100
( I ) Data In Yellow On indicates that data is flowing into the serial port
(O) Data Out Green On indicates that data is flowing out to the serial port
Since the DLM4100 has been pre-configured at the factory for typical PLC to PC use, the only command strings
required are for dialing and hanging up. The command instruction to be entered in either PC or PLC
programmed for dial-up operation are listed below:
Dial String: ATDTx
Command Mode (escape sequence): +++
Hang up: ATH0
Note: Do not use any initialization string at all when commanding the modem to dial. Any command
other than the ATDT followed by the number being dialed can change the pre-configuration of the
DLM4100 and make it inoperative for PLC communications.
Specifications
Input Voltage +8 to 15 VDC
Current Consumption Max 260mA
Ring Voltage Detected 38 to 150 RMS
Ring Frequency Detected 15.3 to 68 Hz
Telephone Loop Current 20 to 100mA
Data Transmit Level -12 to –9.0 dBm
DTMF Transmit Level -2.5 dBm Avg. over 3 second interval
Operating Temperature Range
0° C to 70° C Standard Model
-40° C to 85° C Extended Temperature Model
Enclosure Material 18 gauge steel
Enclosure Dimension 9.0” x 5.0” x 1.5” over mounting flanges
Weight 1.68 lb.
.76 kg.
Note: The following pages are the AT Commands, Modem Registers, and Result codes for your
reference. In pre-configured systems from Data-Linc Group these values should not be changed.