52 Rockwell Automation Publication 2080-UM002G-EN-E - March 2015
Chapter 5 Communication Connections
Use Modems with
Micro800 Controllers
Serial modems can be used with the Micro830 and Micro850 controllers.
Making a DF1 Point-to-Point Connection
You can connect the Micro830 and Micro850 programmable controller to your
serial modem using an Allen-Bradley null modem serial cable
(1761-CBL-PM02) to the controller’s embedded serial port together with a
9-pin null modem adapter – a null modem with a null modem adapter is
equivalent to a modem cable. The recommended protocol for this configuration
is CIP Serial.
Construct Your Own Modem Cable
If you construct your own modem cable, the maximum cable length is 15.24 m
(50 ft) with a 25-pin or 9-pin connector. Refer to the following typical pinout for
constructing a straight-through cable:
Configure Serial Port
You can configure the Serial Port driver as CIP Serial, Modbus RTU, ASCII or
Shutdown through the Device Configuration tree in Connected Components
Work ben ch .
Micro800 controllers do not support more than one hop (for example,
from EtherNet/IP → CIP Serial → EtherNet/IP).
DTE Device
(Micro830/850
Channel 0)
DCE Device
(Modem, etc)
niP-9niP-52niP-8
32DXTDXT7
23DXRDXR4
57DNGDNG2
18DCD)+(B1
402RTD)-(A8
66RSDDCD5
85STCSTC6
74STRSTR3
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