Hach Sigma 950, Инструкция по эксплуатации инструмента

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Section 8 Communications Setup
Data in the 950 Flow Meter can be transferred to a personal computer (PC) data
management software by using a direct cable between the PC and meter, the cellular
modem option, standard modem, or the portable Data Transfer Unit (DTU). See
Figure 12 .
The Data Transfer Unit (DTU) is a hand-held portable device that allows the user to
connect to the flow meter using an RS232 serial cable. Data is transferred from one or
more 950 Flow Meters into the DTU. After collecting data from one or more meters, the
DTU can transfer the information to a PC running data management software. For
detailed information, refer to the Data Transfer Unit Manual (Cat. No. 3516-89).
The 950 Flow Meter can also use Supervisory Control and Data Acquisition (SCADA)
Modbus
®
communications protocol with the RS232 interface or Modem as described later
in this section.
Figure 12 Communication Capabilities
8.1 RS232 Setup
8.1.1 RS232 Connections
Note: All interface receptacles are covered with push-on caps. These caps are designed to protect
the connector pins from dirt and moisture and should be attached to any receptacle not in use.
The RS232 connector is a serial input/output port for communicating with the flow meter
from an external device such as a DTU or direct serial connection to a PC running data
management software. This serial interface can also be used for the SCADA-Modbus
interface. (See
Appendix E on page 109 ).
This port may be configured to communicate at 1200, 2400, 4800, 9600, or 19200 baud.
Table 22 RS232 Connector Pin Assignments
Pin Signal Description Wire Color
A not used white
B ground blue