Baker Hughes PanaFlow Z1G, Руководство пользователя

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Table 2: RS485 cable connections
TB Pin # Signal description
1 RS485+
2 RS485-
3 COM
4 Not Used
5 Not Used
4. If wiring of the unit has been completed, reinstall the rear
cover on the enclosure and tighten the set screw.
Proceed to the next section to continue the wiring of the
PanaFlow Z1G/Z2G Process Gas Flowmeter .
2.4.5 Wiring the option cards
The PanaFlow Z1G/Z2G Process Gas Flowmeter can
accommodate two option cards one in Slot 1 and other
option card in Slot 2. The following option card functions are
available only in certain combinations.
• Analog Inputs (Slot 1)
• RTD Inputs (Slot 1)
• Modbus Communications (Slot 2)
• HART Communications (Slot 2)
• Foundation Fieldbus Communications (Slot 2)
Figure 14 on page 15 shows the connection labels for the
available option cards. Wiring any option card installed in
Slot 1 requires completion of the following steps:
Attention!
To meet CE Mark requirements for all units
intended for use in the EU or in high electrical
noise environments, all electrical cables
must be installed as described in Appendix
A, “CE Mark Compliance and High Noise
Environments”.
1. Disconnect the main power and remove the rear cover.
2. Install a cable clamp in the chosen conduit hole on the
side of the electronics enclosure and feed a standard
twisted-pair cable through this conduit hole.
3. Locate the 12-pin terminal block in Figure 13 on page 14
and wire the option card as indicated on the label inside
the rear cover (see Figure 9 on page 7). Secure the cable
clamp.
IMPORTANT:
If you have multiple flow transmitters, because of the
attached wiring label, all rear covers must remain with
their original meters!
4. If wiring of the unit has been completed, reinstall the rear
cover on the enclosure and tighten the set screw.
IMPORTANT:
Prior to use, the option card must be set up and calibrated.
For more specific instructions on particular option cards,
proceed to the appropriate section(s) that follow.
2.4.5.1 Wiring a 4-20 mA analog inputs option
card
To calculate standard flow rates, the PanaFlow Z1G/Z2G
Process Gas Flowmeter requires accurate temperature and
pressure data from the measurement site. Transmitters
installed in the flowcell can provide this information via an
optional4-20 mA analog inputs option card. This option
card includes two or four isolated 4-20 mA analog inputs
(designated as A, B, C and D), each of which includes a 24
VDC power supply for loop-powered transmitters. Either
input may be used to process the temperature signal, while
the other input is used to process the pressure signal.
IMPORTANT:
To properly enter programming data into the meter, it
is necessary to know which input is assigned to which
process parameter.
The analog inputs, which have an impedance of 118 Ω, should
be connected with standard twisted-pair wiring. Power to
the transmitters may be supplied either by the integral 24
VDC power supply on the analog input option card or by an
external power supply. Figure 10 below shows typical wiring
diagrams, with and without an external power supply, for one
of the analog inputs.
INPUT +
+24V
INPUT +
24V +
IN +
24 VDC
POWER SUPPLY
– +
– OUT
+ IN
Sensor
– OUT
Sensor
Transmitter
Transmitter
Analog Input Analog Input
With External Power Supply With Internal Power Supply
Figure 10: Typical analog input wiring diagrams
Before making any connections, complete the steps in
“Making the Electrical Connections” on page 10. Then, wire
the analog inputs as shown on the label in the rear cover
(see Figure 9 on page 7 ).
IMPORTANT:
The analog inputs option card can be calibrated with the
PanaFlow Z1G/Z2G Process Gas Flowmeter’s built-in analog
outputs. However, be certain that the analog outputs have
been calibrated first.
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