Computer: Pentium 2 GHz ATX compatible CPU (or
better)
* Hard-Disk: one 20 gigabyte
3-1/2" IDE hard disk (or better).
* 1.44 Meg. 3-1/2"
floppy-disk A: drive.
* 128 Meg. of RAM memory
(minimum).
* Parallel printer port.
* Dual Serial ports (RS-232C)
for future host communications, etc.
* 104-key keyboard.
* 15" VGA color monitor
(flat screen optional)
FLOWCON
interface board(s):
Interface the computer to the relay box and the scale displays.
* Fits in standard AT slot for easy
replacement.
* Up to 16 scales using special serial
i/o
* Built in 50-pin relay connector
* Drives a 50-wire cable for
communicating with the relay panel.
*
Can support up to 512 inputs or outputs using D.C. or 115V
AC. control.
Printer: EPSON #LX-810 (or equivalent),
multi-copy, 196 char/sec, bottom or top loading, IBM graphics, cartridge ribbon. All files
used by the system can be printed while controlling the batch process.
Electronic
Scale Displays:
* 'Certified' Handbook-44 scale displays,
suitable for batch environment.
* Resolve 1 part in 20,000 counts, a
10,000# scale by 1#, or a 200# scale by .01#
* Remote operation: displays are
independent of the computer. They should be located conveniently close to the manual
panel.
* Easy calibration: Rice Lake 'IQ
Plus
355' with optional software filtering to filter out scale vibration for greater accuracy.
Stainless enclosure.
* Locally
serviceable by a scale company
in your area.
Relay Box:
* NEMA 12 steel box approx. 30" hi x
20" wide x 6-8" deep (typical).
* Solid state relays with zero crossing
detection.
* Self contained 5v. power supply to
power the relay control board(s).
* Automatic Emergency stop logic -
computer controlled 20a. solid state emergency stop circuit.
* Relay mother boards with replaceable
controller boards.
* AC. barrier strip termination points
for every process connection.
* On-board safety: automatically
de-activate all outputs if a computer failure is detected.
* Wire-ways to contain the AC. wiring.
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A.C. Output/Input relays:
Each relay has a red LED indicator showing when activated. Outputs are
optically isolated and activate during zero crossing. This eliminates power spikes during
turn-on, prevents plant surges from damaging the computer, and allows the system to
operate from a different power grid than the plant.
Inputs show when the input signal is present. Optically isolated
inputs protect against accidental surges.
* See Relay assignments for specific
relay count and function.
Precaution on
electrical noise:
* Since the OPTO-22 relay control boards
contained in this box use low voltage computer signals, any addition of mechanical relays
or other devices which might emit electrical noise, should be avoided.
Battery Backup:
450 VA computer power fail protection system:
* In the event of an AC power failure,
Tripp-Lite unit maintains power for 10-20 minutes, sufficient time to restore power and
resume, or save data before powering down.
Shielded data
cables:
* Shielded Printer cable. Extra long 10
foot length.
* Shielded Relay cable: round, jacketed
50-wire cable with crimp on connectors. Interconnects the PC to a standard NEMA box which
houses the 120V AC optically isolated solid-state relays.
* Shielded scale data cable(s),
interchangeable, one per scale, conveys scale data to the computer.
Options:
Backup switch over: To preserve your current method of manual
control, we strongly recommend you interface through a simple switch-over box. Flowcon
will document this for you.
Backup computer: At minimal cost, you can have a spare computer
that is easily switched out by just changing cables and loading current data.
Analog outputs: i.e. D.C. motor controllers. Control boards are
available with modules which can interface to 4-20 ma. current loop, voltage etc.
Analog inputs: for controlling the process with temperature or
other instrumentation data.
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