MAXICAL
®
III5511-229 GB/98.06/Rev. B1
13
4-wire screened cable should always be used to connect the
temperature sensors to MAXICAL
®
III. Connect the cable screen
“pig-tails” - which must be as short as possible and not longer than
25 mm - to terminal 50 on MAXICAL
®
III. The cable screens
must not be connected to the temperature sensors.
The cable used should have a cross sectional area of at least
0.5 mm
2
when the difference in length between the flow and return
sensor cables is up to 10 m for Pt100, or 50 m for Pt500 sensors.
Screen connection
Return pipe
Flow pipe
Insulated screen
4.3 Temperature sensors (1-8)
MAXICAL
®
III is supplied for use with either Pt100 or Pt500
temperature sensors, indicated on the front plate by either 66-F;
Pt100 input or 66-G; Pt500 input.
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