Host Communications Wiring; Host Digital Communications Cards - Thermo Scientific AquaPro User Manual

2.8

Host Communications Wiring

2.8.1

Host Digital Communications Cards:

When installed, the Host Comms card provides a means for a remote computer to take control of the
measurement system – to report data directly or to remotely diagnose setup or calibrate the system.
Please refer to the appropriate Host Comms manual for programming, routing and operation.
The AquaPro currently supports one of the following communications protocols as described in the sales order
configuration guide on page 8.
 A Host Communications with MODBUS 232
 B Host Communications MODBUS RTU (RS-485)
 C Host communications Ethernet IP, TCP/IP, Modbus TCP.
 D Host Communications DeviceNet
 E Host Communications CANopen
After connections are made, communication is established through the Host Computer. There is nothing to set
up in the AquaPro menu system.
The specific communication protocol being used is described on the AquaPro product label on the outside of the
case.
Wiring for Modbus RTU (RS-485)
The AquaPro does not provide external power to the communications cable. The ground connection between the
AquaPro and the host computer should be made first.
Thermo Scientific AquaPro Analyzer User Guide
MODBUS RTU
7
6
Shield 5
4
Comms A (-) 3
Comms B (+) 2
Ground 1
27