Dräger Polytron 7000 Instructions For Use Manual page 14

Electrical connections
Installing the transmitters in non-explosion-hazard areas:
The explosion-protection markings has to be removed from the transmitter.
Once the transmitter has been used after installation in this manner, it may
never be installed in explosion-hazard areas.
The maximum possible cable lengths can be found in the table on page 21.

In this table, select the line, " Number of transmitters = 1".
Explosion-hazard area, zone 2 or non-explosion hazard
+24 V
4 to 20 mA
Installing fieldbus communication on the transmitter
— The transmitter can be connected to a certified intrinsically safe fieldbus
system, which supports FISCO (Fieldbus intrinsically safe concept).
— The PROFIBUS PA transmission technology for intrinsically safe applica-
tions is MBP. MBP stands for:
– Manchester Coding (M)
– Bus Powered (BP)
— 5 transmitters can be connected to a segment with a typical segment cur-
rent of 100 mA.
Install the 2-wire connection cable in the cable gland, cut it to length and

strip off the insulation (approx. 80 mm).
Shorten the shield (if installed) to prevent short-circuiting.

Connect cable:

1 Use a 4-pole terminal block (X7), Part No. 83 16 268, for the
Dräger Polytron 7000 – Observe the polarity of the connections. Cut excess
wires short or
2 secure them in center terminals (Part No. 83 16 422).
1 Slide connecting terminal back into holder.
Secure cable in holder.

Fold up the installation notes and place them in the Dräger docking station

for future use during commissioning.
Refit raincover (protection against dust and splashing water).

Insert 4-pole (X7) terminal block into left holder.
14
CAUTION
without a safety barrier
CAUTION
Non-explosion-hazard area
1
+
4 ... 20 mA
+
–
0 V
Control unit
X7 X8
2