SC32B Optically Isolated RS-232 Interface
2
2.
Specifications
Operating Temperature:
–25° to +50
C (typical)
Power:
Powered by datalogger; see Section 4,
Operation
Ports:
9 pin female RS-232 configured as DCE.
9 pin male CS I/O
Baud Rate:
1200 bps to 115.2 kbps; see Section 4,
Operation
Size:
4.1 x 2.3 x 7.6 cm (1.6 x 0.9 x 3 in)
Weight:
45.4 g (1.6 oz)
3.
Connector Descriptions
Table 3-1. SC32B Connector Descriptions
RS-232
9 Pin Female Connector
CS I/O
9 Pin Male Connector
Pin #
I/O
Description
Pin #
I/O
Description
1
Out
DCD
1
In
+5 V
2
Out
RXD
2
Ground
3
In
TXD
3
Out
Ring
4
In
DTR
4
Out
RX
5
Ground
5
In
ME
6
Out
DSR
6
In
PE (SDE)
7
In
RTS
7
No Connection
8
Out
CTS
8
No Connection
9
No Connection
9
In
TX
3.1
RS-232
The DB9 RS-232 port is configured as Data Communications Equipment (DCE)
for direct cable connection to Data Terminal Equipment (DTE). Most computers
are configured as DTE. For connection to DCE devices such as modems, the
SC932 or SC932A should be used in place of the SC32B.
3.2
9 Pin
The CS I/O port connects to the datalogger through the SC12 Two Peripheral
Cable supplied with the SC32B. Pin descriptions and direction (Input/Output) are
given in Table 3-1.
4.
Operation
Power for the SC32B datalogger section comes from the 5 V supply on pin 1 of
the datalogger CS I/O. Communication logic levels to and from the datalogger are
referenced to this voltage, ranging from 0 to slightly less than 5 V.
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