PTU300 Wiring Diagram in English

PTU300 Wiring Diagram in English
ELECTRICAL CONNECTIONS
2007-03-09
VAISALA COMBINED PRESSURE, HUMIDITY AND
TEMPERATURE TRANSMITTER PTU300
Power supply:
Operating voltage
with optional power supply module
Power consumption @ 20 °C (Uin 24VDC)
RS-232
Uout 3 × 0 ... 1V / 0 ... 5V / 0 ... 10V
Iout 3 × 0 ... 20 mA
display and backlight
during chemical purge
during probe heating (PTU307)
Analog outputs
current output
voltage output
External loads
current ouputs
0 ... 1V output
0 ... 5V and 0 ... 10V outputs
Max wire size
10 ... 35 VDC, 24 VAC
100 ... 240 VAC, 50/60 Hz
max 28 mA
max 33 mA
max 63 mA
+ 20 mA
+ 110 mA max
+ 120 mA max
0 ... 20 mA, 4 ... 20 mA
0 ... 1 V, 0 ... 5 V, 0 ... 10 V
RL < 500 ohm
RL > 2 kohm
RL > 10 kohm
0.5 mm2 (AWG 20) stranded wires recommended
Electrical Connections
WARNING
Make sure that you connect only de-energized wires.
Signal and Power Supply Wiring
Figure 1 Signal and Power
Supply Screw Terminals
1. Open the transmitter cover by taking out the four cover screws.
2. Insert the power supply wires and signal wires through the
cable bushing in the bottom of the transmitter. Ground the
screen of the electrical cable.
3. Connect the cables of analog output channels 1 and 2 to
terminals Ch1+, Ch1– and Ch2+, Ch2– on the screw terminal
block. See Figure 1 on the left.
4. Connect the cables for the third analog output to the terminals
Ch+ and Ch– on the analog output module. The terminals are
shown in Figure 2.
5. Connect the RS-232 user port cables to terminals RxD, GND
and TxD on the screw terminal block.
6. When wiring optional 240 VAC power supply, RS-485, or
relay module, see the appropriate user guide.
7. Connect the power supply wires to (+) and (-) terminals
marked POWER 10 ... 35V+ 24V~. If you are using a 24 VAC
power supply, see the caution note below before connecting the
supply wires.
Figure 2 Analog output module
www.vaisala.com
Ref. M210831EN-A
ELECTRICAL CONNECTIONS
2007-03-09
Avoid ground loops when using 24 VAC power supply. Use of power supply with
floating ground is recommended. Connect NULL wire to "–" connector of
transmitter and PHASE to "+" when using 24 VAC power supplies.
CAUTION
If you are using single 24 VAC power supply to power multiple transmitters, never
connect same wire to"+" connector of a transmitter and to "–" connector of another
one.
Wiring with Optional 8-Pin Connector
Figure 3 Optional 8-Pin Connector
Table 1 Wiring of 8-Pin Connector
PIN/Terminal
Wire
1
2
White
Brown
Serial Signal
RS-232 (EIA-232)
Data out TX
(serial GND)
3
4
5
6
7
8
Green
Yellow
Grey
Pink
Blue
Shield/Red
Supply –
Supply +
Data in RX
Cable shield
Analog Signal
RS-485 (EIA-485)
A–
(serial GND)
Supply –
Supply +
B–
Cable shield
Ch 3Signal GND
(for channels 1 & 2)
Ch 2+
Ch 1+
Supply –
Supply +
Ch 3+
Cable shield
Grounding the Cables
Ground the screen of the electrical cable properly to achieve the best possible EMC
performance.
Grounding the Housing
In case you need to ground the transmitter housing, the grounding connector is
found inside the housing. Note however that the probe head is connected to the
same potential as the housing. Make sure that different groundings are made to the
same potential. Otherwise harmful ground currents may be generated.
Taking into Use
Turn on the power. The indicator led on the cover is lit continuously during normal
operation. After verifying the operation of the transmitter, close the cover and
replace the cover screws. The transmitter is ready for use.
www.vaisala.com
Ref. M210831EN-A
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