
2-6
FMT 3000 Hardware Reference Manual - Installation
2. Feed the terminal block and cable through the cut-out area and plug the terminal
block into connector P4. Be careful not to touch the exposed components within the
unit to avoid possible static damage.
A simplified schematic of the power board is shown in
board accepts a wide range of AC voltages (18 to 28 VAC) so that a distributed 24 VAC
wiring system may be employed. A range of DC voltages (9 to 30 VDC) may be used to
power the unit as well. To protect the unit and reduce line noise the power board employs
over-voltage input protection and EMI filtering at its input. The power input must not exceed
35 VDC.
The power switch (S1) extends from the board and mounts to the recessed area at the front
of the unit’s case. A red LED indicates when power is on. To prevent an operator from
inadvertently turning off the unit, the switch may be disabled by removing the jumper JP2
(refer to
on page
desired, the switch can also disconnect the back-up battery option (if installed) from the
circuit by removing jumper JP1. Only 1 jumper, JP1 or JP2, may be installed at a time. If
JP2 is installed then JP1 must be removed. If the switch is disabled (JP2 removed) then JP1
should be installed to enable battery back-up. If battery back-up is not desired (for storage,
etc.) then remove the battery connector from P1.
Battery Back-up Option Installation
page 3-28, discusses installing the battery back-up pack.
The power board incorporates a trickle charger to charge the optional battery back-up pack
and also contains “battery on” and battery level detect circuitry. The status signals generated
by this circuitry can be monitored through INT2F functions described in the FMT 3000
Software Manual.
A switching regulator converts the rectified and filtered input voltage to +5 VDC for internal
use by the unit and any installed accessories. The full wave rectified power input is also
supplied to the DC output section of the digital I/O option if installed. For power limitations
of the supply, see