Sixnet VT-MODEM-1US Technical Note

VT-MODEM Interfaces with the Allen-Bradley MicroLogix 1500 PLC using
Rockwell's RSLogix 500 & RSLINX Lite Software
Abstract: The information in this document was provided by Rock Interface Systems, Inc. It
explains the procedure for interfacing a SIXNET Industrial Telephone Modem with an AB
MicroLogix 1500 controller and a computer running the Rockwell RSLogix 500
programming software and the RSLINX communication software. This setup will allow a
remote computer to go on-line with a MicroLogix via a telephone modem connection.
Hardware and Software Used:
· SIXNET Industrial Modem (Part Number: VT-MODEM-1US)
· Serial cable (Part Number: VT-CABLE-MDM) (Incl. with VT-MODEM-1US)
· SIXNET VT-MODEM Setup Wizard v1.15
· Allen-Bradley MicroLogix 1500 CPU (i.e. 1764-LSP)
· Allen-Bradley Advanced Interface Converter (i.e. 1761-NET-AIC)
· Allen-Bradley HHP cable for AIC module to CPU port connection (i.e. 1761-CBL-HM02,
Ser.B)
· Allen-Bradley cable for PC to Micrologix processor (i.e. 1761-CBL-PM02, Ser.B)
· Null modem adapter cable
· Rockwell RSLogix Software v3.01.02.00
· Rockwell RS LINX Communication Driver v2.10.118.0
· Internal Modem on PC
· Analog phone line connections at both ends (digital lines may not work). The phone line at
the MicroLogix end must also be a direct-dial number from the outside (It is recommended
that if possible the analog line should not be routed through a PBX system).
(Note: The Micrologix 1000 can be used as an alternative to the Micrologix 1500.)
SIXNET • 331 Ushers Rd. • Clifton Park, NY 12065 USA • +1 (518) 877-5173 • FAX +1 (518) 877-8346 • sales@sixnetio.com
TN623.DOC
Pin-out of Null Modem Adapter Cable
DB9 Male to Modem
CD 1
RD 2
TD 3
GND 5
RTS 7
CTS 8
1 of 9
PAGE
Technical Note #623
DB9 Male to 1761-CBL-
PM02
® 1 CD
® 3 RD
¬ 2 SD
5 GND
® 8 CTS
¬ 7 RTS
REV: APRIL 2002