Rockwell Automation DAG6.5.8 APPLICATION GUIDE SCADA SYSTEM - Manual (Page 272)

Publication AG-UM008C-EN-P - February 2005
8-6 Configuring Modems
encased in a rugged steel enclosure with large mounting flanges for
ease of installation.
The DLM4300 connects to the PC/PLC through a DB-9 female
connector. All connections and LEDs are located at the front of the
modem. Line connection is made through the RJ-45 jack, as are the
LEDs for Data Out, Data In, Carrier Detected and Power, providing
visible confirmation of modem operation and diagnosis.
Figure 8.3 DLM4300 Assignments
LLM1000-2 and LLM1000-4
The LLM1000 series modems are 2 and 4 wire Frequency-shift keyed,
half-duplex/simplex, Bell 202/CCITT V.23 compatible, 0 to 1200 baud
modem that interface with Allen-Bradley equipment. They are
designed to be used on private, leased unswitched telephone lines or
any dedicated two conductor wire (twisted or untwisted, shielded or
Table 8.3 DLM4300 DB-9 Assignments
DLM4300 Pin # PLC-5 25-Pin AIC+, Logix5550, PC, or
SLC 500 9-Pin Assignment
1 8 1 Carrier Detect
2 3 2 Transmit Data
3 2 3 Receive Data
4 20 4 DTR
5 7 5 Signal Ground
6 6 6 DSR
7 4 7 RTS
8 5 8 CTS
9 NC NC Ground
6 7 8 9
1 2 3 4 5