D-Series Syringe Pumps - Isco
D-Series Syringe Pumps - Isco
D-Series Syringe Pumps - Isco
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D <strong>Series</strong> <strong>Syringe</strong> <strong>Pumps</strong><br />
Section 6 Serial Interface<br />
Each instrument is provided with a method of selecting unit<br />
identification numbers and a baud rate. For proper operation,<br />
each instrument must be set to a unique unit identification<br />
number (see Section 6.6). It is also important that each unit’s<br />
baud rate is set to the same speed. Possible baud rates are 1200<br />
and 19200. Other baud rates of 300, 1200, 2400, 4800, 9600,<br />
19200, 38400, 57600, and 115200 are supported by the D <strong>Series</strong><br />
pumps but are not part of the Teledyne <strong>Isco</strong> defined communications<br />
standard.<br />
Electrical standards are RS-232-C; connector pin usage is outlined<br />
in Table 6-1. Characters consist of 1 start bit, 8 data bits<br />
(low order first with 8 th bit always set to zero), and 1 stop bit.<br />
There is no parity bit used. All characters will be printable ASCII<br />
characters. Control characters (0-1FH) are ignored except for carriage<br />
return (0DH).<br />
The serial unit number and baud rate can be changed from the<br />
default values through the MENU key. Select SERIAL under the<br />
menu; and adjust the values using the softkeys (see section 6.6).<br />
Table 6-1 External control connector<br />
serial pin connections<br />
Pin No. Name Use<br />
1 CHASSIS GROUND Used to connect to the shield of the<br />
interconnect cable.<br />
2 RECEIVE Serial interface data input. Standard<br />
RS-232-C signal levels.<br />
3 TRANSMIT Serial interface data output.<br />
Standard RS-232-C signal levels.<br />
4 REQUEST TO SEND RTS chain - RS-232-C input is buffered<br />
and connected to pin 21.<br />
5 CLEAR TO SEND CTS buffered RS-232-C output of<br />
pine 25 input.<br />
6 +11 VDC DATA SET READY is held on.<br />
7 COMMON Signal common for all signals.<br />
8 +11 VDC DATA CARRIER DETECT is held on.<br />
9 +5 VDC Test Voltage.<br />
10 -11 VDC Negative test voltage.<br />
14 TRANSMIT CHAIN Serial data from next unit.<br />
16 RECEIVE CHAIN Serial data to next unit.<br />
21 RTS CHAIN RTS buffered RS-232-C output of pin<br />
4 input.<br />
25 CTS CHAIN CTS chain -RS-232-C input is<br />
buffered and connected to pin 5.<br />
NOTE: Only pins 2, 3, and 7 are required for serial interface to one<br />
controller.<br />
6-2
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