Ceilometer CT25K
User’s Guide CT25K-U059en-2.1
16
• Remote communication is normally connected to J3.
• A local maintenance terminal, for example PSION3, is intended to be
connected to J4. A protective cap is included for covering J4 when not in
use.
External mating connectors with 2 m (7 ft.) cable are included for J2 and for
J3. The power plug of the J2 cable can be cut when the unit is permanently
installed at the final site.
The cables for J2 and J3 are intended to be drawn through the hole of the
pedestal to the connectors. Provide sufficient slack for permitting the unit to
be tilted later.
Figure 2-6 shows the connecting signal leads with optional Power and Signal
Termination Boxes.
Figure 2-6 Termination Box Wire Connections
Suggested wire dimensions for the external cabling are:
Line Power Supply: 3 x 1.5 mm
2
(AWG 16)
Remote Communication: 0.35 mm
2
(AWG 22) twisted pair with shield
NOTE
When permanent line power installation is made, the
maximum size of the fuse protecting the power line is 10 A
2.6 Grounding
The power supply connector J2 provides a standard protective ground for the
instrument chassis.
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