Teledyne ULTRAFLOW 150, Руководство по эксплуатации, Страница: 26 / 162

ULTRAFLOW 150 GAS FLOW AND TEMPERATURE MONITOR
5.2 ELECTRICAL DESCRIPTION
The TIE can be powered with either 115 VAC or 230 VAC feeds. The power
supply is auto ranging and will function normally with inputs from 85
VAC to
265 VAC, 50-60HZ. The power ON/OFF switch is located inside on the External
Interface Board. This board’s main purpose is to provide a place to land the field
wiring. The terminal blocks are sized to handle 12 – 28 AWG wire.
The data cable to the Enhanced Remote Panel uses shielded two-wire cable to
carry the serial data via a commercial communication protocol. The signals to
and from each of the transducer probes are carried by a RG62 coax cable and a
multi pair, individually shielded, 22
AWG, cable carries the purge on/off signal.
5.2.1 External Interface PC Board
The main purpose of the External Interface PC Board is to provide a connection
point for the field wiring. It has three terminal blocks. TB1 is for landing the AC
mains and TB2 is used to land the data cable network wires. If the optional Direct
Interface (560DI) is incorporated into the system, the unused terminals of TB2
and all of TB3 are used to land the interface wires. A double pole power ON/OFF
switch is also located here. The board has direct connections to the Power Supply
Board, Flow Mother Board, and optional Six Point I/O Board.
Consult the Site Specification Data sheet of Appendix A for information on the
configuration of your individual monitor.
5.2.2 Power Supply Board
The Power Supply Board is located in the upper right corner of the enclosure. It
plugs directly into the Flow Mother Board. The power supply is auto ranging. It
requires 85-265 VAC, 50-60 HZ input power and pr15 VDC regulated, -
15 VDC regulated, and +5 VDC regulated outputs.
5.2.3 Flow Mother Board
At the heart of the Flow Mother Board are two control devices a Field
Programmable Gate Array (FPGA
) and a self-contained computer processor
module. The FPGA performs all of the low-level control functions of the
transducer interface. The computer module is a stand alone, SBC 332 Processor
Board that plugs directly into the Flow Mother Board. The computer module
handles all calculations and higher level control/timing. Please refer to Fig 5-2.
The Flow Motherboard architecture is complex, as is the custom application
software it runs. A detailed description of the board’s electronics and software is
beyond the scope of this manual. For ease of understanding, the Mother Board’s
function is described on a block diagram level.
5-2