Cell Cables; Cells With Mp-5 Connector - HACH LANGE si629 C Manual

3. Installation
Terminal assignment (rear panel)
CRISON INSTRUMENTS, S.A.
E-08328 ALELLA - Barcelona
Made in Spain
4-20 mA
RED
VCA

3.3. Cell cables

Compensation of the cable length
To minimize the effect of the cable resistance in a conductivity measurement, the cable length is compensa-
ted by the 4-wire system. With the Pt 1000 temperature sensor, the cable resistance has little importance.
However, in order to reduce the resistance of the conductor to a half, 2 cables have been connected to
the ends of the sensor.

3.3.1. Cells with MP-5 connector

MP-5 connector, 5 contacts
12
si629 C_HACH LANGE_Ed 0510.indd ANG:12 si629 C_HACH LANGE_Ed 0510.indd ANG:12
Transmitter si629 C
S/N:
IP 54
CELL
A L L 2 / C
Important notes:
• El si629 C does not require ground
connection (terminal 1).
• In environnements with interference problems
it is recommended to connect the instrument to
ground using terminal 1.
It is also recommended to use shield cables
for the cell signal (triaxial cable), and the
temperature probe.
The external shield of the triaxial cable and
the temperature cable must be connected to
terminal 16.
DANGER
Relays:
- Limit the current up to 3 A by using
one fuse.
- Do not connect cables with voltage
higher than 24 V.
TERMINALS
si629 C si629 C
(panel mount)
(wall mount)
6
6
7
7
8
9
10
11
12
COLOUR
18 White
18 Brown
17 Pink
17 Yellow
16 Shield
15 Green
14 Blue
13 Gray
12 Red
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