4.1.2.2 Wiring tables
4 to 20 mA / power supply
See Figure G on the fold-out page.
Pin
Mark
Wire
Function
color
1
4-20 /
Brown 4 to 20 mA signal (operation as
S
source or sink)
2
Black
V-
3
+
Red
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
Relay
1
NO
FLT
Fault
2
COM
Fault
3
NC
Fault
4
NO
A2
A2
5
COM
A2
6
NC
A2
7
NO
A1
A1
8
COM
A1
9
NC
A1
4.1.2.3 Preparing for electrical installation
1. Loosen the threaded pin (2) and unscrew the housing
cover from the lower part of the housing, see figure A on
the fold-out page.
2. Pull out the printed circuit board unit.
3. Carry out the wiring according to one of the following
figures on the fold-out page and the following sections:
Fig-
Connection diagram for
ure
G
1)
Housing ground
G1
Printed circuit board unit Polytron 57x0 IR
G2
Printed circuit board unit Polytron 5200 CAT /
Polytron 5310 IR
G3
Printed circuit board unit Polytron 5100 EC
H
Housing ground and internal cabling of Polytron 5100
1)
EC
Instructions for use
|
Dräger Polytron 5000 Series
Normally open
Common connection
Normally closed
Normally open
Common connection
Normally closed
Normally open
Common connection
Normally closed
Fig-
Connection diagram for
ure
I1
4-20 mA (operation as current source)
I2
4-20 mA (operation as current sink)
I3
Standalone operation, relay only
H1
2-wire installation of Polytron 5100 EC
J
Relay connections
1) For instruments without a relay, install a protective earth conductor
as equipotential bonding .
4.1.2.4 Connecting the 4 to 20 mA interface
For information on connecting to a controller (PLC), refer to
the documentation for the relevant controller.
1. Pull out the 3-pin connector.
2. Connect the three wires for the power supply and signal to
the respective terminal according to the wiring table and
the figure on the fold-out page.
3. Plug the connector back into the socket and tighten the
screws.
4. Close the instrument, see 4.1.2.7 Closing the gas
detector.
4.1.2.5 Connecting an instrument with relay (standalone
operation)
Connecting the 4 to 20 mA interface
1. Remove the 3-pin connector.
2. Connect the power cables to the corresponding terminal
as shown in Figure I3 on the fold-out page.
3. Bridge pins 1 and 2 of the 3-pin connector.
4. Connect the relay cables, see Connecting the relay
connector.
5. Close the instrument, see 4.1.2.7 Closing the gas
detector.
The following tables show the status of a connected alarm
indicator and whether it indicates faults such as power loss to
the transmitter.
The relay's behavior depends on the alarm configuration and
the relay contact to which the alarm indicator is connected.
Relay configuration: Normally energized
Contact
Alarm indicator status and fault indica-
tion by the alarm indicator
Alarm trig-
gered
Normally
ON
Closed
Normally
OFF
Open
|
Transmitter installation
Transmitter-
Field wiring
specific
fault
fault
indicated
not indicated
indicated
indicated
en
11