Vaisala PTB330 User Manual
ELECTRICAL CONNECTIONS
2008-08-04
VAISALA BAROCAP® DIGITAL BAROMETER PTB330
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Operating voltage |
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10 ... 35 VDC |
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Typical power consumption at +20 °C |
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(Uin 24 VDC, one pressure sensor) |
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RS-232 |
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25 mA |
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RS-485 |
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40 mA |
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Uout |
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25 mA |
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Iout |
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40 mA |
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display and backlight |
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+ 20 mA |
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Analog outputs |
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current output |
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0 ... 20 mA, 4 ... 20 mA |
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voltage output |
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0 ... 1 V, 0 ... 5 V, 0 ... 10 V |
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External loads |
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current ouputs |
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RL < 500 ohm |
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0 ... 1V output |
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RL > 2 kohm |
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0 ... 5V and 0 ... 10V outputs |
RL > 10 kohm |
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Max wire size |
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1.5 mm2 (AWG 16) |
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Electrical Connections |
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WARNING |
Make sure that you connect only de-energized wires. |
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Figure 1 Signal and Power
Supply Screw Terminals
Basic Wiring Using Screw Terminals
1.Open the four cover screws and open the barometer cover.
2.Insert the power supply wires and signal wires through the cable bushing in the bottom of the barometer. Ground the screen of the electrical cable.
3.Connect the RS-232 user port cables to terminals TxD, GND and RxD on the screw terminal block. See Figure 1 on the left.
4.If you have the optional analog output module, connect the cables to the terminals Ch+ and Ch– on the analog output module. The terminals are shown in Figure 2.
5.When wiring the optional AC power supply, RS-485, or relay module, refer to the PTB330 User’s Guide.
6.In case you need to ground the barometer housing, the grounding connector is found inside the housing. Make sure that different groundings are made to the same potential. Otherwise harmful ground currents may be generated.
7.Connect the power supply wires to (+) and (-) terminals marked
POWER 10 ... 36V=.
8.Close the cover and tighten the cover screws.
Figure 2 Analog output module
www.vaisala.com |
Ref. M210958EN-A |
ELECTRICAL CONNECTIONS
2008-08-04
Wiring with M12 (8-Pin) Connector
Figure 3 Optional 8-Pin Connector
Table 1 Pin Assignments of the 8-Pin Connector
PIN/Terminal |
Wire |
Serial Signal |
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Analog Signal |
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RS-232 (EIA-232) |
RS-485 (EIA-485) |
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1 |
White |
Data out TX |
A – |
- |
2 |
Brown |
(serial GND) |
(serial GND) |
Signal GND (for both channels) |
3 (optional) |
Green |
External power control |
(serial GND) |
Signal GND (for both channels) |
4 |
Yellow |
- |
- |
Analog output |
5 |
Grey |
Supply – |
Supply – |
Supply – |
6 |
Pink |
Supply + |
Supply + |
Supply + |
7 |
Blue |
Data in RX |
B – |
- |
8 |
Shield/Red |
Cable shield |
Cable shield |
Cable shield |
Wiring with Optional D-9 Connector
Figure 3 Optional D-9 Connector
Table 2 Pin Assignments of the D-9 Connector
PIN/Terminal |
Wire |
Serial Signal |
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Analog Signal + |
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RS232 |
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RS-232 (EIA-232) |
RS-485 (EIA-485) |
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1 |
Red |
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2 |
White |
TX |
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TX |
3 |
Black |
RX |
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RX |
4 (optional) |
Yellow |
External power control |
External power control |
External power control |
5 |
Brown |
Ground |
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Ground |
6 |
Green |
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LO |
Aout |
7 |
Blue |
Ground for supply |
Ground for supply |
GND supply |
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voltage |
voltage |
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8 |
Grey |
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HI |
AGND |
9 |
Orange |
Supply voltage (10...30 |
Supply voltage (10...30 |
Supply |
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VDC) |
VDC) |
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www.vaisala.com |
Ref. M210958EN-A |
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