Measurement Computing PointScan 300 Series rev.1.0 - Manual (Page 39)

PointScan/300 User’s Manual 9-12-01 Gateways 8-1
Gateways 8
This section documents the following gateway:
PointScan/442
PointScan/442
Ethernet/RS-232 to PT-bus Gateway
Use the PointScan/442 to add either PointScan/300 series I/O or high channel count data loggers
(TempScan/MultiScan/ChartScan) to an Ethernet-based system
Features
• Supports expansion of up to 20 PointScan/300 series modules on a single Ethernet port
• Links serial-based TempScan/1100, MultiScan/1200, or ChartScan/1400 data loggers to Ethernet
• Supports the Modbus/TCP open Ethernet protocol standard
• RS-232 port for diagnostics or modem connection
• DIN-rail or panel mountable
Overview
The PointScan/442 gateway is a convenient solution for linking the economical PointScan/300 series I/O
or the high-channel density TempScan/MultiScan/ ChartScan data loggers to Ethernet via a single IP
address. For applications with small I/O count per node, the PointScan/100 series (with built-in Ethernet) is
an ideal solution, but for applications with higher I/O count per node the PointScan/442 is a practical means
of adding multiple (up to 20) PointScan/300 series I/O. For applications with very high concentrations of
I/O (up to 992) the TempScan/1100, MultiScan/1200, and ChartScan/1400 provide a range of low cost-per-
channel options for measuring temperature (TC) and volts (V, mV).
The module’s Ethernet port responds to either Modbus or PT-bus protocol, and module’s RS-232 port is
used for either configuration and diagnostics or as an alter-native means of accessing the I/O. The Ethernet
port and the RS-232 port can be used simultaneously. The PointScan/442 polls the PointScan/300 series
modules or TempScan/MultiScan/ChartScan data loggers and makes data available for display and storage.
The PointScan/442 gateway works transparently with Citect monitoring, test, and control software but is
fully compatible with Modbus/TCP drivers that are part of most commercially available HMI/SCADA
software.
The PointScan/442 gateway has two communication ports: a serial port, and an Ethernet port.
CA-221
Serial (RS232) Port Cable Wiring