Dräger X-zone 5500 Notice D'utilisation page 52

Connecting devices via a cable connection
XEXT1 (female)
RS485
1 RS485-A
2 RS485-B
3 GND
Safety parameters for RS485 (XEXT2)
U =8.01 V; I = 0.105 A; P
i i i
U =8.01 V; I = 0.105 A; P
o o o
C and L may occur simultaneously.
o o
CAUTION
!
Use connection XEXT1 either for charging (pin 4, 5) or
the RS485 port (pin 1, 2, 3). Using the same
connections for both applications at the same time is
not permitted.
Charger (only for use outside potentially explosive areas)
4 Charging voltage (U )
m
5 Ground charging circuit (GND 2)
5.1.2 RS485 connections
1
2
3
1
1
2
XEXT1
2
3
3
CAUTION
!
Ensure that the cable strands are not crossed!
52
1 6
7
2 5
3 4
= 0.21 W; C = 250 nF; L = 100 µH
i i
= 0.21 W; C = 350 nF; L
o o
1
XEXT2
2
3
1
2
3
1
XEXT1
05833112.eps
= 250 µH
Plug (1) - male, order no. 83 24 370
Plug (2) - female, order no. 83 24 371
RS485 connection between X-zones
Cable type (3): Belden 3107A, 2 x 2 AWG 22 max. 25 m
between 2 devices
RS485 connection with intrinsically safe equipment
Cable type (3): e.g. Belden 3107A, 2 x 2 AWG 22
Wiring must comply with the following safety parameters:
U
= 8.01 V; I
i i
U = 8.01 V; I
o
250 µH
C and L may occur simultaneously.
o o
5.1.3 RS485 connection with non-intrinsically safe
1
equipment via Z-barriers
2
3
WARNING
!
Explosion hazard!
Comply with the sequence of the Z-barriers.

Make sure the cable strands do not cross.

Make sure the cable length is max. 25 m is.

Potential equalisation must be applied along the

intrinsically safe circuits.
02333112.eps
The explosion protection no longer applies when not
using potential equalisation along the intrinsically safe
circuit.
The X-zone can be connected with non-intrinsically safe
equipment (e.g. PC RS485 interface) via Z-barriers. Series
switching of the types Pepperl+Fuchs Z757 with
Pepperl+Fuchs Z966H (BAS 01 ATEX 7005 and IECEx SIM
06.0012 XX) is permitted as follows:
3
max. 25 m
= 0.105 A; P = 0.21 W; C
i i
= 0.105 A; P = 0.21 W; C
o o
Dräger X-zone 5500 / 5800
2
03133112.eps
= 250 nF; L = 100 µH
i
= 350 nF; L =
o o