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All Eddy Probes or NCPU’s
(Non-Contacting Pickups) System’s, Drivers or Proximitors in common use today
require –24 VDC power. In transmitter based PLC and DCS monitoring systems
with standard +24 VDC powering this requires an additional power supply be added
to create –24 VDC. The +24 VDC
wires cannot simply be reversed, as this will create a direct short across the
power supply.
The following diagram shows how
to wire two (2) 24 VDC power supplies to create both (+) and (-) voltages with a
shared common. Although not required the power supplies should be as close to
each other as possible to prevent differences in ground potential.
When ordering a CMCP500 Series
Monitoring System using Eddy Probes order two (2) 24 VDC supplies. Wiring will
be completed to supply both (+) and (-) 24 VDC in our integration shop.
Examples of Voltage and
Amperage Requirements:
1. Eddy Probe Proximitors and
Drivers, -24 VDC, 50 mA each.
2. CMCP540 or 545 Transmitters, +24 VDC, 50 mA each.
3. CMCP540A or 545A Monitors, +24 VDC, 100 mA each.
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