VersaTRAK RTU User M anual
Page 9 of 31
Last Revised: 05/23/02
SIXNET
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Box 767
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Clifton Park, NY 12065 USA
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+1 (518) 877-5173
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FAX +1 (518) 877-8346
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Power
Requirements
VersaTRAK and Mini-VersaTRAK RTUs, SIXTRAK I/O expanders and all SIXNET I/O
modules accept 24 volts DC from a VersaTRAK power supply (VT-PS-024-01N) or from a
user DC power source. (See below.)
A VersaTRAK or Mini-VersaTRAK RTU will power up to 20 SIXTRAK I/O modules
through the ST-Bus port wiring. Any additional (beyond 20) SIXTRAK I/O modules must
receive their power from SIXTRAK I/O expanders (ST-EX-001-20U).
DC power for RemoteTRAK and EtherTRAK I/O modules is provided through direct
connections to each module. Refer to the SIXNET Product Catalog for power consumption
ratings of each module.
AC Pow er Wiring
and Fusing
The VT-PS-024-01N power supply operates on 90V to 260V sinusoidal AC power at 47 to
63 Hz. If fusing is required, use a 1 amp slow blow fuse for 110 VAC. For 220 VAC use a
0.5 amp slow blow fuse.
DC Pow er Wiring
(VT-PS-024-01N)
The VersaTRAK or Mini-VersaTRAK RTU, SIXTRAK I/O expanders and user
instrumentation loops can be powered from the VT-PS-024-01N power supply. The VT-PS-
024-01N supplies 24 volts DC at a maximum of two amps.
DC Pow er Wiring
(User DC Source)
The VersaTRAK or Mini-VersaTRAK RTU, I/O expanders and user instrumentation loops
can be powered from a single DC source from 18 to 30 volts. A DC power source of 10 to 30
volts can be used if no SIXTRAK I/O modules are connected to the ST-Bus port.
To calculate the current requirements, add the wattage required for the RTU and SIXNET I/O
modules in use, then divide the total wattage by the DC power source voltage. Then add any
current needed for user instrumentation loops.
VersaTRAK DC Pow er and ST-Bus Connections
