DATA-LINC GROUP
3
DLM4500 User Guide
PN 161-10008-001A
rev 4/04
Introduction
The Data-Linc Group DLM4500 modem is designed to work on public dial-up telephone systems. The modem will work on
both dial-up voice grade phone lines and leased lines. It connects to a normal telephone service using a RJ-11 jack (2 wire)
and connects to the users equipment via a 9-pin DB-9 connector utilizing RS232 signals and screw terminals if a AE-485
(2-wire) or AE-422 (4-wire) unit.
The Data-Linc Group DLM4500 is a compact modem designed and manufactured to operate in industrial applications. It
has a wide DC voltage input power range and the operating temperature range of this device is -40° to +70° C.
The mechanical and electrical specifications are listed in Appendix B.
The DLM4500 has front panel LED indicators for Power (Red), Data In from user equipment (Yellow), Data Out to users
equipment (Green), and Carrier Detect (Amber).
The DLM4500 is configured using ‘AT’ style commands sent via the 9-pin port while the modem is in ‘Command Mode’.
Factory default is set at 9600 baud. All normal configurations are performed using the RS232 connection on the front panel
even if the units are a AE-485 or AE-422 model.
A complete list of ‘AT’ commands are in appendix A. Note that all AT command character strings must end with a carriage
return character (Enter key, ctrl M, 0xd hex).
Systems Examples
Diagram 1
Dial-Up
Diagram 2
Leased Line
LINE
DATA
I C P
O
DLM4500
DATA-LINC GROUP
(425) 882-2206
RESET
POWER
VDC
- +
LINE
DATA
I C P
O
DLM4500
DATA-LINC GROUP
(425) 882-2206
RESET
POWER
VDC
- +
+
LINE
DATA
I C P
O
DLM4500
DATA-LINC GROUP
(425) 882-2206
RESET
POWER
VDC
- +
+
LINE
DATA
I C P
O
DLM4500
DATA-LINC GROUP
(425) 882-2206
RESET
POWER
VDC
- +
+
RS-232
RS-232
RS-232
Remote 0
Remote 1
Remote 2
Master
Dial-Up Connection
to Telco Network
Dial-Up Connection
to Telco Network
Dial-Up Connection
to Telco Network
Dial-Up Connection
to Telco Network
RS-232
LINE
DATA
I C P
O
DLM4500
DATA-LINC GROUP
(425) 882-2206
RESET
POWER
VDC
- +
LINE
DATA
I C P
O
DLM4500
DATA-LINC GROUP
(425) 882-2206
RESET
POWER
VDC
- +
+
RS-232
Remote
Master
Telco or Private
Leased Line
RS-232
Telco or Private
Leased Line
