Connection To Transmitters; Connecting The Junction Box Ex D To Polytron ® Transmitters; Connecting The Junction Box Ex D To Pointgard; Connection To Control Units - Dräger Junction Box Ex d Instrucciones De Montaje

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Connection to transmitters

11. Tighten all cable entries and screw plugs (at least 5
rotations and 266 LB IN. / 30 Nm).
4 Connection to transmitters
4.1 Connecting the Junction Box Ex d to
®
Polytron transmitters
1. Screw the cable harness (X) into the Polytron
(Fig. F1).
2. Feed the field wiring through the cable entry and connect it
to terminal (X) (Fig. G).
In case of 3-wire field wiring:
● Install screw bridges between contacts 1a/1b and
3a/3b of the terminals. (Fig. C).
3. Connect the cable shield to one of the two the grounding
screws inside of the transmitter (Fig. G1).
4. Connect the plug of the cable harness to the socket of the
PCB unit.
5. Attach the lid and tighten it (≥44 LB IN. / ≥5 Nm) (Fig. E).
6. Tighten the set screw (≥ 8 LB IN. / ≥0.7 Nm) (Fig. E).
7. Close unused housing openings with screw plugs.
8. Tighten all cable entries and screw plugs (at least 5
rotations and 266 LB IN. / 30 Nm).
4.2 Connecting the Junction Box Ex d to
PointGard
For the connection to PointGard, the transmitter cable
harness (X) is not required. It can be disposed of
professionally or returned to Dräger.
1. Feed the field wiring through the cable entry and connect it
to the remote CatEx sensor connection (Fig. G).
In case of 3-core field wiring:
● Use double ferrules (Fig. I).
2. Close PointGard, see the instructions for use of the
transmitter.
1) Included in the scope of delivery of Gard 2200 CAT Remote
8
®
enclosure
1)
5

Connection to control units

For the connection to control units (e.g., REGARD), install
Junction Box Ex d (see "Installation", page 7) and connect the
field wiring to the control unit (see the instructions for use of
the control unit).
5.1 PIR 7x00
Wire color and socket
Wire Socket Function
color
red 1a + DC voltage supply
black 1b - Common reference potential
brown 2 4–20 mA signal and HART signal
output
white 3a Serial interface
green/yell 3b Potential equalization
ow
6

Replacing the sensor

Observe the instructions for use of the sensors and of the
transmitter or evaluation unit.
To replace the sensors, remove the sensor plug from the
socket of the cable harness.
The wires of the cable harness must not be removed from the
terminal block. If the wires are removed, reconnect the wires
to the correct terminals with the aid of the label (e.g., connect
plug 1a with socket 1a).
1. Unscrew the lid.
2. Remove the sensor plug from the socket of the cable
harness (Y).
3. Unscrew the old sensor.
4. Screw in the new sensor (at least 5 turns and 266 LB IN. /
30 Nm).
5. Observe the preferential position of the sensor (Fig. A2).
For PIR 7x00 sensors (Fig. A2a):
● The "Dräger" lettering on the splash guard must read
horizontally.
A deviation from the horizontal of ±30° maximum is
permissible.
6. Connect the sensor plug with the socket of the cable
harness (Y) (Fig. B1).
● In case of DD/DQ CatEx sensors, twist the sensor
cables with 7 rotations (Fig. B2).
7. Attach the lid and tighten it (≥44 LB IN. / ≥5 Nm) (Fig. E).
8. Tighten the locking screw (≥ 8 LB IN. / ≥0.7 Nm) (Fig. E).
Assembly instructions |
Junction Box Ex d