Connecting Devices Via A Cable Connection; Connections Xext1/Xext2 - Dräger X-zone 5500 Notice D'utilisation

5 Connecting devices via a cable
connection
CAUTION
!
Before positioning the devices, a functional test (see
chapter 3.4 on page 46) must be conducted on every
device.
X-zone 5x00 devices must always be connected from
connection XEXT1 to connection XEXT2.
NOTICE
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Due to diverse customer requirements, Dräger offers
only a communication cable (order no. 83 21 669). All
relevant cable parameters are described in this
chapter.
If radio connections are not allowed or blocked, the
devices can be connected via communication cable.
The maximum cable length between two devices is
25 m.
Combined wireless and cable operation is possible.
2
1
1. Switch on the X-zone 5500 (see chapter 3.1 on page 44).
2. Plug the communication cable into the charging port/
RS485 connection (XEXT1)(1) on the rear side of the
device.
3. Connect the end of the communication cable to the switch
relay/RS485 connection (XEXT2) (2) of the second device.
The communications
LEDs on the coupled
devices light up green.
Dräger X-zone 5500
WARNING
!
If the communication LED is lit in red, check the cable
connection.
If required, connect further devices via communication

cable as described above.
NOTICE
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Dräger recommends performing a connection test
(see chapter 3.4.3 on page 46) after positioning all the
devices.
5.1

Connections XEXT1/XEXT2:

5.1.1 Pin assignment/properties
CAUTION
!
Connect only intrinsically safe circuits, which meet the
safety parameters. The explosion protection no longer
applies when not using an intrinsically safe circuit.
The cable shield must only be connected to the
intrinsically safe or associated equipment.
XEXT2 (male)
RS485
1 RS485-A
2 RS485-B
3 GND
Safety parameters for RS485 (XEXT2)
U =8.01 V; I = 0.105 A; P
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01233112.eps
U =8.01 V; I = 0.105 A; P
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C and L may occur simultaneously.
o o
CAUTION
!
Use connection XEXT2 either for the relay output (pin
4, 5, 6) or the RS485 port (pin 1, 2, 3). Using the same
connections for both applications at the same time is
not permitted.
Relay output
4 Normally Closed (NC)
5 Normally Open (NO)
6 Change Over (CO)
7 Not connected
01333112.eps

Connecting devices via a cable connection

6
5
4
= 0.21 W; C = 250 nF; L
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= 0.21 W; C = 350 nF; L
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XEXT2
1
7
2
3
02133112.eps
= 100 µH
i
= 250 µH
o
55