|Computer: Pentium 2 GHz ATX compatible CPU (or
* 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
* Parallel printer port.
* Dual Serial ports (RS-232C)
for future host communications, etc.
* 104-key keyboard.
* 15" VGA color monitor
(flat screen optional)
Interface the computer to the relay box and the scale displays.
* Fits in standard AT slot for easy
* Up to 16 scales using special serial
* 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
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.
* '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
* Easy calibration: Rice Lake 'IQ
355' with optional software filtering to filter out scale vibration for greater accuracy.
serviceable by a scale company
in your area.
* NEMA 12 steel box approx. 30" hi x
20" wide x 6-8" deep (typical).
* Solid state relays with zero crossing
* 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
* 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.
|A.C. Output/Input relays:
Each relay has a red LED indicator showing when activated.
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.
* 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.
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 Printer cable. Extra long 10
* 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.
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.