Input And Output - YOKOGAWA AXG1A Installation Manual

4.6

Input and Output

This section provides descriptions of the specificaiton and wiring of the input and output signals.
In accordance with the communication and I/O code specified, the function assigned to each terminal is different. For the
specification and terminal configuration, read Section 4.4 and the applicable general specifications as listed in Table 1.1.
For AXFA11, read the applicable user's manual as listed in Table 1.1.
(1) Output Signal
Galvanic isolation:
All circuits for inputs, outputs and power supply are galvanically isolated from each other.
Output signal type
Active current output One or two current outputs are available depending on the specification.
[Iout]: Depending on the measured value, the active current output delivers 4 to 20 mA.
Figure 4.6.1 Connection diagram: Active current output [lout]
Active pulse output Connection of an electronic counter
[P/Sout]: Observe that maximum allowable voltage and voltage polarity are correct when wiring.
Figure 4.6.2 Connection diagram: Active pulse output [P/Sout] (Electronic counter)
Connection of an electromechanical counter
Figure 4.6.3 Connection diagram: Active pulse output [P/Sout] (Electromechanical counter)
When Communication and I/O code DG or JG is specified, upon shipment from the
manufacturing plant, the output is set for electromechanical counter. If the output is set for
electronic counter, the following parameter is change from "For magnetic counter" to "Normal".
For detailed parameter setting, read the user's manual of the applicable communication type
as listed in Table 1.1.
Display Menu Path (AXW/AXW4A/AXG1A):
Device setup ►Detailed setup ►Pulse/Status out ►PO2/SO2 ►Active pulse
Output current
Load resistance
Load resistance for BRAIN communication
Load resistance for HART communication
Current output accuracy
Transmitter
Load resistance
Internal power supply
Maximum pulse rate
Maximum frequency output rate
Transmitter
24 V
0 V
Maximum current
Average current
Internal power supply
Maximum pulse rate
Pulse width
Transmitter
24 V
0 V
<4. Wiring>
Specification
4 to 20 mA DC
750 Ω or less (Integral flowmeter or AXW4A),
1 kΩ (AXG1A)
250 to 450 Ω
230 to 600 Ω
±8 μA (±0.05% of span)
Iout+
Receiver
Iout-
F0448.ai
1 kΩ or more
24 V DC ±20%
10,000 pulses/s
12,500 Hz
P/Sout+
Electronic
Load
Counter
Resistance
P/Sout-
F0449.ai
150 mA or less
30 mA or less
24 V DC ±20%
2 pulses/s
20, 33, 50, 100 ms
P/Sout+
Electromechanical
Protective
Counter
Diode
P/Sout-
F0450.ai
45
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IM 01E24A01-01EN