Measurement-computing TempScan/1100 Manual de usuario Pagina 26

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1-12 System Overview 899493 TempScan / MultiScan User's Manual
A CA-47 cable connects the unit with the computer. The TempScan/1100 or MultiScan/1200 end has one
DB9 connector, and the computer end has two connectors – one for a DB9 and one for a DB25. O
ther crossover-type cables can be used if they are wired as shown in the tables. The tables list the
following four connections from the TempScan/1100 or MultiScan/1200 unit:
To a DB9 connector configured for RS-232
To a DB25 connector configured for RS-232
To a DB9 connector configured for RS-422
To a Mini DIN8 connector configured for RS-422.
TempScan/1100 or MultiScan/1200
To PC Connection (RS-232)
TempScan/1100 or MultiScan/1200
To PC Connection (RS-232)
DB9 Male
Pin & Signal
Cable
Wirin
g
DB9 Female
Pin & Signal
DB9 Male
Pin & Signal
Cable
Wirin
g
DB25 Female
Pin & Signal
2 RxD-
--
3 TxD-
2 RxD-
--
2 TxD-
3 TxD-
--
2 RxD-
3 TxD-
--
3 RxD-
5 GND
←→
5 GND
5 GND
←→
7 GND
7 RTS+
--
8 CTS+
7 RTS+
--
5 CTS+
8 CTS+
--
7 RTS+
8 CTS+
--
4 RTS+
TempScan/1100 or MultiScan/1200
To Macintosh Connection (RS-422)
TempScan/1100 or MultiScan/1200
To Macintosh Connection (RS-422)
DB9 Male
Pin & Signal
Cable
Wirin
g
DB9 Male
Pin & Signal
DB9 Male
Pin & Signal
Cable
Wirin
g
Mini DIN8 Male
Pin & Signal
1 GND
←→
3 GND
1 GND
←→
4 GND
2 RTS+
--
7 CTS+
2 RTS+
--
2 CTS+
4 TxD+
--
8 RxD+
4 TxD+
--
8 RxD+
5 TxD-
--
9 RxD-
5 TxD-
--
5 RxD-
6 CTS+
--
6 RTS+
6 CTS+
--
1 RTS+
8 RxD+
--
4 TxD+
8 RxD+
--
6 TxD+
9 RxD-
--
5 TxD-
9 RxD-
--
3 TxD-
The following text describes the various pin connector signals:
Transmit Data Negative (TxD-): This output pin transmits serial data to an RS-232 or RS-422 device.
The serial data received is sent with the word length, baud rate, stop bits, and parity configured for the
particular port. This signal is low true.
Transmit Data Positive (TxD+): This output pin transmits serial data to an RS-422 device only.
The pin functions identically to TxD- except that its polarity is inverted. This signal is high true.
Receive Data Negative (RxD-): This input pin accepts serial data sent by an RS-232 or RS-422 device.
The serial data received is expected to match the word length, baud rate, stop bits, and parity
configuration of the particular port. This signal is low true.
Receive Data Positive (RxD+): This input pin accepts serial data sent by an RS-422 device only.
It functions identically to RxD- except that its polarity is inverted. This signal is high true.
Request To Send Positive (RTS+): This output pin is used as a hardware handshake line to prevent an
RS-232 or RS-422 device from transmitting serial data to the TempScan/1100 or MultiScan/1200 unit
when it is not able to accept it. When automatic RTS/CTS handshaking is selected, the unit will assert
(high) the RTS+ signal when greater than 4096 memory locations are available in its internal buffers. If
available memory drops below 4096 bytes, the unit unasserts (low) the RTS+ signal.
Request To Send Negative (RTS-): This output pin is used as a hardware handshake line with an
RS-422 device only. The pin functions identically to RTS+ except that its polarity is inverted. This
signal is low true.
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