Filter
Top Products
Model 2002 page 29
Communications Option Board
SECTION 6
Both RS-232 and RS-485 communication interface boards are available as an option for the
Model 2002. The communication option boards allow data to be output to a host computer with
the appropiate interface. Connection to the RS-232 or RS-485 communication interface boards
are via a 9 pin D-subminiature female connector.
6.1 RS-232-E Interface Specifications
Format ................................. EIA standard RS-232-E, full-duplex, no handshaking, asynchronous
Data Rate ......................................................................................................................... 9600 baud
Character Length ...................................................................................................... Eight data bits
Parity ................................................................................................................................. No parity
Stop bits.........................................................................................................................One stop bit
A common application of the RS232 version of the HPM-2002, is to connect the pressure gauge
directly to the serial port of a PC. This is done by first wiring a communication cable in the
Figure 6.1
manner shown below.
PIN MNEMONIC SIGNAL DESCRIPTION
2 TX Transmit Data Transmits data within RS-232-E voltage levels
3 RX Receive Data Accepts data within RS-232-E voltage levels.
5 SG Signal Ground Establishes the common ground reference
potential for all interchange circuits
when communicating via RS-
232-E.
4 CTS Clear to send Host computer ready to accept data. (Reserved
for future use, not implemented by present
software.
8 RDY Ready Ready to receive data (always high, not
implemented by present software.