Dräger Polytron 8000 Serie Instrucciones De Uso página 43

16.3 Cable specifications
For non-conduit installations, use shielded cables.
®
Analog and HART connection with controller and
power supply
Power supply and
signals
Relays
Digital connection with controller
Instruments with fieldbus interfaces and remote sensors
must be installed with shielded cables.
Modbus RTU
PROFIBUS PA
Foundation Fieldbus
Power supply
1) If the distance between the controller and the transmitter is very long
(>1 km) and the power supplies of the controller and the transmitter
are separate, interference or differential differences can occur. In this
case, 3-core cabling with ground must be selected. Ground is then
connected to the transmitter and looped through to the ground of the
controller.
16.4 Power supply and relays
1)
Relay rating
2)
SPDT
230 V
30 V , resistive
load
1) For safety-related applications (SIL 2), the maximum contact rating is
®
reduced (see Polytron 8xx0 Safety Manual).
2) Single pole, double throw, (changeover electrical contacts)
Power supply Polytron 8xx0
Operating voltage
Inrush current
1) At supply voltages of < 7 V DC the instrument provides a fault signal.
The warning signal "undervoltage" depends on the connected load at
the 4-20 mA output and the cable resistance. In case of lower load
(e.g. 230 Ω), the fault relay drops out and the current output is 0 mA.
In case of higher load (e.g. 500 Ω), warning message 011 is indicated.
Instructions for use |
Dräger Polytron
3-core shielded cable
24 - 12 AWG / 0.2 - 2.5 mm²
20 - 12 AWG / 0.5 - 2.5 mm²
1)
2-core or 3-core , ≥ 26 AWG
2-core, cable type A
Wave impedance R : 135 - 165 Ω
w
Capacitance / unit length C': <
30 pF/m
Loop resistance R': 110 Ω/km
Core diameter d: 0.64 mm
Core cross section q: > 0.34 mm²
Shield coverage: ≥ 90 %
2-core, 24 - 12 AWG / 0.2 -
2.5 mm²
0.1 A - 5 A
0.1 A (minimum) - 5 A
1)
10 to 30 V at the instrument
2.3 A for 2 ms at 24 V ,10 Ω
resistor
®
8000 Series
Operating current
®
Polytron 8100 EC
without relay, non-
remote sensor
with relay, remote
sensor
®
Polytron 8200 CAT
without relay, non-
remote sensor
with relay, remote
sensor
®
Polytron 8310 IR
without relay, non-
remote sensor
with relay, remote
sensor
®
Polytron 87x0 IR
without relay, non-
remote sensor
with relay, remote
sensor
16.5 General specifications
Polytron 8xx0 enclosure
Enclosure material
Enclosure guard
Display
1) Polytron 8100 EC NEMA 4X enclosure guard pending.
2) The IP degrees of protection do not cover the detection of a gas,
during or after exposure of the equipment to these conditions. In the
event of dust deposits and contact with water through immersion or a
jet of water, check the adjustment and functional integrity of the instru-
ment.
3) There is only a limited visibility of the display at high temperatures
(>65 °C).
Technical data
80 mA
100 mA
105 mA (DrägerSensor DQ)
130 mA (DrägerSensor LC)
145 mA (DrägerSensor DQ)
165 mA (DrägerSensor LC)
145 mA
185 mA
330 mA
350 mA
Copper-free aluminum
1)
NEMA 4X
2)
IP 65/66/67
Resolution 128 x 64 pixels,
3)
backlit
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