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8.3 Wiring Connections of Standard ULTRA register
(1)
Current Pulse Output
(2-wire system)
24VDC
Terminal Block
1
2
3
4
V
SIG
0V
24VDC
600Ω
max.
Terminal Block
1
2
3
4
600Ω
max.
V
SIG
0V
G
G
NOTE: OVAL circuit to accept current pulses comes in two
configurations as shown above. Refer to the receiving
instrument instruction manual before making connections.
(2)
Analog Output
(2-wire system)
Terminal Block
1
2
3
4
＋
−
−
＋
12 to 45VDC
Analog
Indicator
Power
In case of
current input
NOTE: In case of voltage input, couple an external
load resistor (see the acceptable load
resistance range in Section 8.4).
(3)
Open Collector Output
(3-wire system)
Terminal Block
1
2
3
4
V
SIG
0V
12 to 24
VDC
Max. 50mA
R
E(
≦
30VDC)
1 ms (std.) or 50 ms
Select R such that the
max. allowable current
is held below 50mA.
(4)
Voltage Pulse Output
(3-wire system)
Terminal Block
1
2
3
4
V
SIG
0V
12 to 24VDC
1 ms (std.) or 50 ms
10kΩ min.
1kΩ
Regulated
Voltage
7Vmin.
1Vmax
(5)
Current Pulse + Analog Output
(4-wire system)
Terminal Block
1
2
3
4
−
−
−
※
G
12 to 45VDC
Power Supply
Capacity 80mA min.
Analog
Indicator
Totalizer
Load Resistor
＋
＋
＋
※
Select the voltage input for the totalizer.
Make sure of the trigger level of voltage input and determine the
supply voltage and load resistance value.
NOTE 1: In OVAL receiving instruments, signal
conversion takes place with an internal load
resistor. If you build a system like the one
shown here with a commercially available
totalizer of other make, verify that the signal
levels to the totalizer match, since signal
conversion from current pulses into voltage
pulses takes place according to the law
4/20mA X load resistance.
2: If you use an OVAL receiving instrument in
the configuration shown here, make sure of
the current carrying capacity of receiving
instrument's power supply.
If it has a problem in current carrying
capacity, a separate power supply should be
provided for the analog indicator.
8.4 Load Resistance Range, Standard ULTRA register (current pulse, analog output)
In the specification of two-wire transmission system
for analog and pulse signals, the power lines also
serve as signal lines.
The transmission loop requires a DC power supply.
If it is desired to connect an instrument in a loop, the
load resistance of both the instrument and
conductors must fall within the operating range as
shown in the graph at right.
Standard: Power supply voltage = 24V DC
Load resistance = 250
Ω
1650
(600)
300
0
12
(24)
45
Supply Voltage (V DC)
Load Resistance (Ω
)
Operating
Range
Summary of Contents for ULTRA UF-II
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