Setting Up to Use the RS-232 Interface
The Model Z9216 is configured as a DCE (transmit on pin 2, receive on pin 3) and supports the
CTS/DTR hardware handshaking discussed above. The CTS signal (pin 5) is an output of the meter
indicating that the Model Z9216 is ready, while the DTR signal (pin 20) is an input to the meter that is
used to control the Model Z9216 transmissions. If desired, the handshake pins may be ignored and a
simple three-wire interface (pins 2, 3 and 7) may be used.
Before communicating with the Model Z9216, the RS232 characteristics must be set. As shown in
Table 3-2, the RS232 interface is configured using the rear panel switches SW1-1 to SW1-7. The last
three switches set the baud rate to 300, 600, 1200, 2400, 4800, or 9600 baud. Parity may be enabled
or disabled, and set to even or odd, and, the number of bits in a data byte may be set to 7 or 8.
Note: the Model Z9216 must be set to eight data bits if binary data output formats are used.
Table 3-2 - SW1 Settings for the RS-232 Parameters
BAUD RATE
SW1-0 SW1-1 SW1-2 Baud Rate
ON ON ON 300 Hz
OFF ON ON 600 Hz
ON OFF ON 1200 Hz
OFF OFF ON 2400 Hz
ON ON OFF 4800 Hz
OFF ON OFF 9600 Hz
ON OFF OFF 19.2 kHz
FORMAT
OFF Parity On SW1-3
ON Parity Off
OFF Even Parity SW1-4
ON Odd Parity
OFF 8 Data Bits SW1-5
ON 7 Data Bits
05674321
RS232 SWITCH CONFIGURATION ON THE 2600/2610 REAR PANEL
THIS SETUP SHOWS SETTING FOR 9600 BAUD, NO PARITY, AND 8 DATA BITS
# OF BITS/ DATA BYTE
7/8
ODD OR EVEN PARITY
PARITY ON/OFF
BAUD RATE
2
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