10
Expert-50 rev.10
Expert-50
Probes operate at low voltage and are isolated from the supply.
Be sure that probe cables remain isolated from all high voltage
sources. In particular, do not route the probe cables through the
same electrical knockout as other cables. Do not connect the
shield from the probe cable to a terminal or a ground.
Extending a probe:
Each probe can be extended up to 500 feet (150
meters). To extend a probe:
Use a shielded cable of outside diameter between 0.245 and
0.260 in (6.22 and 6.60 mm) (the cable dimensions should not be
under 18 AWG) to ensure the cable entry is liquid tight.
Do not
ground the shielding.
It is preferable to solder the cable joint to ensure a proper contact
between the two cables.
CAUTION:
Do not run probe cables next to other power cables. When
crossing over other cables, cross at 90°.
Defective probes:
An alarm is generated when a defective probe is
detected. To identify the defective probe, select the functions, PROBE
TEMPERATURES and RELATIVE HUMIDITY. Dashes are displayed
instead of a reading when the probe is defective. In the case of room
temperature probes, the controller will operate according to the tem-
perature of the remaining probes.
2. RELAY PANELS
Use a shielded cable with two twisted pairs. Connect the shielding to
the SH terminal. Use one pair for terminals 1 and 4 and the other pair
for terminals 2 and 3.
2
4
1
3
S H
RELAY PANELS
ONE PAIR
ONE PAIR
Summary of Contents for EXPERT-50
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