Panametrics DigitalFlow XGS868i, Руководство для стартапов, Страница: 18 / 86

Chapter 1. Installation
10 DigitalFlow™ XGS868i Startup Guide
1.7.3 Wiring Std 0/4-20 mA Analog Outputs
The standard configuration of the Model XGS868i flow transmitter includes two isolated 0/4-20 mA analog outputs
(designated as outputs 1 and 2). Connections to these outputs may be made with standard twisted-pair wiring, but
the current loop impedance for these circuits must not exceed 600 ohms.
To wire the analog outputs, complete the following steps:
1. Disconnect the main power and remove the rear cover.
2. Install the required cable clamp in the chosen conduit hole on the side of the electronics enclosure.
3. Refer to Figure 10 on page 23 for the location of terminal block J1 and wire the analog outputs as shown. Secure
the cable clamp.
Note: Analog outputs 1 and 2 in the wiring diagram correspond to analog outputs A and B in Slot 0 in the XGS868i
software.
WARNING!
To meet CE Mark requirements, all cables must be installed as described in
Appendix A, CE Mark Compliance .
4. If wiring of the unit has been completed, reinstall the rear cover on the enclosure and tighten the set screw.
WARNING!
Make sure both covers, with their o-ring seals, are installed and the set screws tightened before
applying power in a hazardous environment.
Note: Prior to use, the analog outputs must be set up and calibrated. See Chapter 1, Calibration, of the Service
Manual for detailed instructions.
Proceed to the next section to continue the initial wiring of the unit.
1.7.4 Wiring the Serial Port
The Model XGS868i flowmeter is equipped with an RS232 or an RS485 serial interface. An RS485 option is also
available with MODBUS capability. When the MODBUS option is present, the XGS868i may also have the standard
RS232 serial interface.
The serial port is used to transmit stored data and displayed readings to a personal computer by connecting the
meter’s serial interface to the serial port of the PC. In addition, the Model XGS868i can receive and execute remote
commands, using the Instrument Data Manager or PanaView software via this link.
For more information on serial communications refer to your
EIA-RS Serial Communications manual (916-054).
Proceed to the appropriate sub-section for wiring instructions.
WARNING!
To meet CE Mark requirements, all cables must be installed as described in
Appendix A, CE Mark Compliance .