Eaton Power Xpert PXM 4000, Руководство пользователя и инструкция по установке

Страница: 276 / 292

G.4. 24V Source Outputs CM4 & CM6
Note that the Outputs are color coded green and have gender inverted terminal plug
header to prevent incorrect wiring with the communication ports.
The maximum external load rating is 10W for each output.
• The intended use for CM4 is to support external accessories
• The intended use for CM6 is to support the graphical display PXD-MMG The wiring
between the 24V source and the 24V load may not exceed 30M in length.
• Beyond 30M, a separate external power supply must be supplied.
• The power cable should be shielded with drain wire and the twisted power lines 18 -14
AWG.
• Use ferrules to dress the power lines and prevent frayed wire shorting.
The 24V outputs may NOT be used in parallel. The output power is common to the associ-
ated RS485 circuit.
• CM3/CM4 - RS485/Power are common.
• CM5/CM6 - RS485/Power are common.
• Care should be taken not to drive a voltage between the RS485 and power common.
• A common communication and power cable can be used from the meter to the display.
Belden 7895A or equivalent is recommended. Use Red/black pair for power, Blue/white
pair for data
The 24V outputs are turned on during power up.
If during a voltage sag the input to the power supply is too low for normal operation, the
CM4 and CM6 24V outputs are turned off to conserve ride through energy. This output
drop will cause the display to cycle power and re-initialize after full voltage is restored.
Page 268
IM02601004E
www.eaton.
G Standard Cards