Contrec 515 BR03, Operation Manual

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Chapter 6
Communications
Overview
This chapter describes the communications between the instrument and
another communicating device such as a computer or a printer. You should
have relevant information about the devices to which the instrument will be
connected. Some connection examples are included in this manual,
however, the operation and connection of other devices is outside the scope
of this manual.
Hardware Interconnection
The instrument has two communication ports:
•
COM-1 RS-232 port on the rear panel (DB9 female connector)
•
COM-2 RS-485 port on the rear panel (optional) or Ethernet (optional)
The appropriate interface and protocols are selected during calibration.
COM-1 RS-232 Port
The COM-1 RS-232 port provides communication between the instrument
and one other device such as a host computer or a printer.
Note: A printer must have a serial port to be able to be directly connected
to the flow computer. It is not possible to communicate directly with
a printer via a parallel port.
Computers use either a DB9 or a DB25 connector, and the connections to
each type are shown in Figure 15.
Figure 15 RS-232 Cable Connections to a Computer
Note: The instrument requires a cable with straight-through connections.
Do not use a null modem cable for RS-232 connection to a computer.
Instrument
2
3
5
7
8
TxD
RxD
GND
CTS
RTS
DB9
Computer/Printer
3
2
7
4
5
RxD
TxD
GND
RTS
CTS
DB25
2
3
5
7
8
DB9
Common
Optional
Optional
515 BR03 - 15 August 2021