Connection To The Transmitter - Endress+Hauser Oxymax COS22 Kurzanleitung

Wiring
• The certified oxygen sensor Oxymax H COS21D-*12*1COS22D-BA**** in combination with the
measuring cable CYK10-G**1 may only be connected to certified, intrinsically-safe, digital sensor
circuits of the transmitter Liquiline M CM42-*G*********. The electrical connection must be
carried out in compliance with the wiring diagram.
• Oxygen sensors for use in Ex areas have a special, conductive O-ring. The metallic sensor shaft is
electrically connected to the conductive mounting location (e.g. a metallic assembly) by means of the
O-ring.
• You must take appropriate measures to connect the assembly or the mounting location to the
operational ground in accordance with Ex guidelines.
• The sensors must not be used under electrostatical critical process conditions. Strong vapour or dust
streams acting directly on the plug-in system are to be avoided.
• Ex versions of digital sensors with Memosens technology are marked with an orange-red ring on the
plug-in head.
• The maximum permissable cable length is 100 m (330 ft).
7.1.2 Temperature classes
If the ambient temperatures indicated are observed, no temperatures which are impermissible for the
temperature class in question will occur at the sensor.
Ambient temperature T
Reference temperature T
7.2

Connection to the transmitter

7.2.1 COS22D
The sensor is electrically connected to the transmitter by means of the special measuring cable CYK10.
Fig. 5: Special measuring cable CYK10
12
T3
–5 ... +135 ˚C
a
ref
Temperature class
T4
–5 ... +120 ˚C
+25 ˚C
Oxymax COS22/COS22D
T6
–5 ... +70 ˚C
a0003350
Endress+Hauser