Operation; Installation - Dräger PEX 1000 Instructions For Use Manual

3

Operation

3.1

Installation

3.1.1 Mounting
The PEX 1000 is intended to be mounted to a top-hat rail.
Put the PEX 1000 on the top-hat rail and apply slight pressure to it until it engages.

NOTICE
i i
Make sure that the top-hat rail engages completely and PEX 1000 is securely fixed to
the top-hat rail.
3.1.2 Installing electrical connections
CAUTION
!
Electrical wiring is only to be laid and connected by an expert paying attention to the
pertinent regulations and laws concerning electrical equipment in potentially explosive
atmospheres as well as approval conditions.
Connection between PEX 1000 and controller unit
The maximum cable lengths for loads of 250 Ohms and a sensor current of <270 mA can

be extracted from the following tables:
Cable length between sensor and PEX 1000:
Sensor
current (36 Ohm/km)
240 mA
250 mA
260 mA
270 mA
280 mA
290 mA
300 mA
Dräger PEX 1000
2
0.5 mm 0.75 mm
(24 Ohm/km)
200 m
185 m
170 m
160 m
150 m
140 m
130 m
Core cross-section
2
1.0 mm
(18 Ohm/km)
300 m 400 m
280 m 370 m
260 m 345 m
240 m 320 m
225 m 300 m
210 m 280 m
195 m 260 m
Operation
2 2
1.5 mm
(12 Ohm/km)
500 m
500 m
500 m
500 m
500 m
450 m
400 m
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