Mounting and Wiring

Remote Access

Remote Access

Overview

Remote controller access via dial-up modem is available via the communication setup. An external modem is required at the controller and is connected to the standard RS232 configuration port (marked “CONFIGURATION”). All functions of the Control Builder and User Utility programs can be performed over this link. Remote access functions include on-line monitoring, configuration upload and download, and firmware upgrade.

Modem requirements

Most commercially available modems can be used with the UMC800 controller. The modem must have the following capabilities:

RS232 interface

Auto answer

Can operate at 9600 baud, 8 data bits, 1 stop bit, and no parity

Hardware handshaking can be disabled

Software handshaking can be disabled

Data Terminal Ready (DTR) input can be disabled

Result codes can be suppressed

Echo can be disabled

Must be equipped with non-volatile memory (NVRAM) so that settings that are configured using command strings can be retained during a power-outage

Must be able to load the NVRAM settings automatically on power-up

Cable requirements

You will need an interface cable to connect the modem to the DB-9 female connector (marked “CONFIGURATION”) on the controller. If your modem has a 25-pin connector, be sure to use a DB-25 to DB-9 modem cable.

TIP

The Null Modem cable used to directly connect a PC running Control Builder Software to the controller may typically not be used to connect the PC to the modem or to connect the modem to the controller.

If your modem requires command string configuration, you will need an interface cable to connect the modem to your PC. Refer to your modem and computer documentation to determine this cable’s requirements.

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UMC800 Controller Installation and User Guide

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Honeywell UMC800 manual Remote Access, Overview, Modem requirements, Cable requirements