Thermo Scientific HB-S200, User Manual

Page: 26 / 77

Sarasota 200 Ultrasonic Multipath
Flowmeter
Section 2, SYSTEM COMPONENTS, Page 2-8 Thermo Fisher Scientific
SYSTEM COMPONENTS
2.3.2.1.6. Digital signal connections
When in intermittent mode under external control (see Appendix 1, screens), the external
controlling device must apply a connection between W and OV of PL12 to switch the
Sarasota 200 on.
PL12 - 1 to 4 and PL20 – not used at present.
2.3.2.1.7 Serial communications connections
Serial communications are controlled by the CPU (see 2.3.2.2). It has 2 ports and
connections are made via SK5 and PL14 on the mother board as follows:
•
SK5 - RS232 via 9 way D connector (female). See Fig 3. This port is used for connection
to a PC for setting up, diagnostics and downloading logged data.
•
PL14 - RS232 via 9 way D connector (male). See Fig 3. This port is used for connection
to a modem for remote access for programme alterations, diagnostics and downloading
logged data.
Pin (F) Signal Comment
2 TxD
3 RxD
5 0V SK5 – RS232, PC connection
9 way female D connector
Pin (M) Signal Comment
1 CD
2 RxD
3 TxD
4 DTR
5 0V
7 RTS
8 CTS
9 RI PL14 RS232, Modem connection
9 way male D connector
2.3.2.2 Central processor (CPU)
The central processor carries out the control and timing functions, stores and runs the
operating program and stores the data logs.
It controls the two serial i/o ports, see 2.3.2.1.7.
The CPU card plugs into the mother board by removing the cover.
There are no operator settable links on the CPU.
2.3.2.3 LCD display
The LCD has 2 lines of 20 characters to display measurements, computed results and
diagnostic information. (see Section 2.5).
The LCD card is located on the opening lid of the enclosure.