Sensia QRATE Scanner 3300, Инструкция по установке, эксплуатации и обслуживанию

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RTD Inputs
The 4-wire RTDs are recommended for measuring temperature in temperature-compensated gas and liquid calculations,
though a 2- or 3-wire RTD may prove functional. Wiring is essentially the same for all three models, though wire color
may vary as indicated. Wire as shown in Figure 3.8 .
2-Wire
WHITE
RED
RTD+
RTD-
I+
I-
JUMPER
JUMPER
3-Wire
WHITE
RED
WHITE
JUMPER
RTD+
RTD-
I+
I-
4-Wire
WHITE
RED
WHITE
RED
RTD+
RTD-
I+
I-
I+
R+
R-
I-
RTD 1, 2
I+
R+
R-
I-
RTD 1, 2
I+
R+
R-
I-
RTD 1, 2
Figure 3.8 - Process temperature input
Analog Inputs - Voltage Input
The analog inputs can be used to receive readings from a pressure or temperature transmitter for use in any flow run. An -
alog Inputs 1 to 4 can be configured through the web-interface for 0 to 5 V or 1 to 5 V. Alternatively, they can be used to
log measurements from any device with a compatible analog output.
Through the web-interface, the QRATE Scanner 3300 can be configured to provide 8 to 24 VDC at 20 mA for powering
a 0 to 5 V or 1 to 5 V transmitter. For reduced power consumption, disable analog inputs in the QRATE Scanner 3300
web interface when they are not in use. Wire as shown in Figure 3.9 .
A IN 1,2,3,4
P
0 to 5 V or 1 to 5 V analog input
External Supply
A IN 1,2,3,4
P
0 to 5 V or 1 to 5 V analog input
Internal Supply
Transmitter
Power Out
(8.5 to 24 VDC)
Signal
Return
0 to 5 V or
1 to 5 V
Transmitter
9 to 30 VDC
Power Supply
Power In
Signal
Return
Power In
Figure 3.9 - Voltage Analog input
54
Section 3 QRATE Scanner 3300 integrated control flow computer