Dräger Polytron 8000 Serie Notice D'utilisation page 12

en | Transmitter installation
Relay option
– At voltages >30 V AC or >42.4 V DC, the relay cables
must be enclosed in protective tubing, or double-insulated
cables must be used.
– The wiring for the optional relay module must be selected
and fused according to the rated voltages, currents and
environmental conditions.
– To ensure that a fault is recognized - without having to
look at the instrument - an alarm device must be
connected to the fault relay.
– Voltage differences can cause insulation faults. Do not mix
electric loads with different voltage types (AC or DC).
Using DC loads, ensure that relay contacts only control
devices with the same DC voltage rating. Using AC loads,
ensure that relay contacts are only connected to devices
sharing a common phase.
Special conditions in accordance with IEC 60664-1
– The device variants incorporating a FISCO fieldbus
interface as well as gas detection transmitter type
ETR 02...5** must operate in circuits that are limited to
overvoltage category I/II/III in accordance with IEC 60664-
1.
4.1.2.2 Connection diagrams
The fold-out pages show the following connection diagrams:
Fig- Connection diagram for instruments
ure
G Without relay, enclosure grounding
H With relay, enclosure grounding
I1 4-20 mA / HART (current source)
I2 4-20 mA / HART (current sink)
I3 4-20 mA / HART (separate power supply, current
source)
H1 Standalone, relay only
J Foundation Fieldbus / PROFIBUS PA, enclosure
grounding
K Modbus RTU, enclosure grounding
J1 Foundation Fieldbus / PROFIBUS PA, field wiring
K1 Modbus RTU, field wiring
L Power supply digital interfaces
12
4.1.2.3 Wiring tables
4 to 20 mA/HART interface
Pin Mark
1 PWR+ V+
2 PWR- V-
3 PWR- V-
4 4-
20 mA
5 PE
Fieldbus interface
Pin Mark
1 Data-
A
2 Data-
B
3 GND
4 SHIEL
D
Pin Mark
1 PWR+ V+
2 PWR- V-
Relay connectors
All relays (A1, A2, FLT) of the device can be configured as
"normally energized" (normally closed relay) or "energized on
alarm" (normally open relay). The relays are configured at the
factory as normally closed relays ("normally energized"). This
ensures fail-safe operation.
Contrary to convention, the NO, COM, NC markings on the
instrument are selected to correspond to the normally
energized state. When the device is energized, the marking
corresponds to the function of the pins.
Pin Mark
1 NO
2 COM
3 NC
4 NO
5 COM
6 NC
7 NO
8 COM
9 NC
Instructions for use |
Dräger Polytron
Function
Use if the instrument is connected to a sepa-
rate power supply (operation as source).
4 to 20 mA signal (Operation as source or
sink)
Protective earth
Optional PE for relay connection. Connecting
PE together with the 4-20mA analog output
may cause ground loops.
Function
Signal Line A
Signal Line B
Ground
Cable Shield
Function
Relay
FLT Fault Normally open
Fault Common connection
Fault Normally closed
A2 A2 Normally open
A2 Common connection
A2 Normally closed
A1 A1 Normally open
A1 Common connection
A1 Normally closed
®
8000 Series SW version ≥ 4.0.x