Liquisys M CPM223/253 Electrical connection
Endress+Hauser 27
Field instrument measuring cable connection
Proceed as follows to connect a pH-electrode with Memosens functionality to the field
instrument:
1. Open the housing cover to access the terminal block in the connection compartment.
2. Break the punching of a cable gland from the housing, mount a PG gland and guide the
cable through this Pg gland.
3. Connect the cable in accordance with the terminal assignment (see connection
compartment sticker).
4. Tighten the Pg gland.
Panel-mounted instrument measuring cable connection
To connect a pH electrode with Memosens functionality, connect the CYK10 cable in
accordance with the terminal assignment to the terminals on the rear of the device (see
connection sticker).
Example of connecting pH electrode
The following diagram shows the connection of a pH-electrode with Memosens
functionality.
C07-CPM2x3xx-04-06-00-xx-012.eps
Fig. 24: Connecting CPS11D with CYK10
Signal transmission between the Memosens electrode and the coupling of the CYK10 cable
takes place contact free and via completely encapsulated coils. This offers the following
advantages:
• Thanks to the fact that the electrode and transmitter are galvanically isolated, the signals
are not affected by secondary potential. As a result, in contrast to sensors without
Memosens functionality, no symmetrically high-resistance connection is required to
guarantee safe measurement.
• The Memosens plug-in head and the Memosens coupling are completely water-proof.
• There are no open contacts. Contact corrosion, creepage currents and shunts are ruled out.
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