Remote Communication Overview - Electro Industries 1252 Installation And Operation Manual

5.16: Remote Communication Overview

Use modems (dedicated or dial-up) when devices are at great distances. EIG recommends using
RS-485 wiring with a Modem Manager. See section 5.13.
PC at office
PC at office
(Required if 232/485 Converter does not support
Electro Industries/GaugeTech
Remote Connection—RS-232
Local PSTN (Public
Modem Switched
Telephone
Network)
Remote Connection—RS-485
Originate Telephone Line
Modem
NULL Modem Adapter
DTE/DCE reconfigura
Figure 5.16: Remote Connections—RS-232/RS-485
Doc # E107706 V1.25
Remote
Modem
RS-232
NULL Modem Adapter or Null
Remote
Modem
RS-232 to RS-485
tion)
(Modem Manager
Recommended)
Nexus 1250/1252
Meter
Cable Required
Nexus 1250/1252
Meter
RS-
Converter
5-18