7
14063434.02 10/2019 EN/DE
WIKA operating instructions transmitter, models GDT-20, GDHT-20
EN
2. Safety
Repair work and maintenance:
■
IEC 61634 (Use and handling of SF
6
gas in high-voltage switchgear and control gear)
■
CIGRE 1991 (Handling of the SF
6
gas)
■
CIGRE report 276, 2005 (Practical SF
6
gas handling instructions)
■
CIGRE report 163, 2000 (Guide for SF
6
gas mixtures)
SF
6
is a colourless and odourless, chemically neutral, inert and not inflammable gas which is
approx. five times heavier than air, not toxic and not harmful to the ozone layer.
Detailed information is given in IEC 60376 and IEC 61634.
2.4 Labelling, safety marks
Product label GDT-20
Product label GDHT-20
Explanation of symbols
Before mounting and commissioning the instrument, ensure you read the
operating instructions!
GDT-20
P#
S#
Pressure: 0 ... 16 bar abs
Temp.: -40 °C ... +80 °C
Density: 0 ... 60 g/l
MODBUS RTU
17 ... 30 VDC, Pmax. = 3 W
Made in Germany www.wika.com
Pin Description
1 C RS-485 GND
2 U
B
17-30 VDC
3 GND Ground
4 A RS-485
5 B RS-485
13C
P# article number
S# serial number
Measuring range pressure
Measuring range temperature
Measuring range density
Communication protocol
Power supply
Pin assignment
GDHT-20
P#
S#
Pressure: 0 ... 16 bar abs
Temp.: -40 °C ... +80 °C
Density: 0 ... 60 g/l
Dew point: -60 °C ... +20 °C
MODBUS RTU
17 ... 30 VDC, Pmax. = 3 W
Made in Germany www.wika.com
Pin Description
1 C RS-485 GND
2 U
B
17-30 VDC
3 GND Ground
4 A RS-485
5 B RS-485
13C
P# article number
S# serial number
Measuring range pressure
Measuring range temperature
Measuring range density
Measuring range dew point
Communication protocol
Power supply
Pin assignment
