Using The Rs232 Serial Interfaces In The Knauer-Net - Knauer WellChrom HPLC Pump K-1001 Handbuch

30
Table 3

Using the RS232 Serial Interfaces in the KNAUER-Net

Fig. 24
Connecting the HPLC Pump K–1001 to Other Instruments
Technical specifications of analog/error/start signal connections and picture of
connector
Signal
Start connections
START IN
START OUT
Error- connections
ERROR IN
ERROR OUT
Rec- connection
PRESSURE
This chapter will explain the nescessary connections for operating the HPLC-
pump K-1001 controlled by ChromGate
information refer to the user manual of the software.
The two RS232 serial interfaces on the rear side of the device, see {5.4} in Fig.
4 on page10, enable digital data transfer between the HPLC Pump K–1001 and
other instruments like other pumps, detectors or a PC which runs a software
package like ChromGate
are communicating with each other and form an integrated network. In the
Setup Menu control by KNAUER NET has to be chosen.
All devices are connected in a token ring in the following way: The first RS232
interface (the left one) of the first device is connected to the second RS232
interface (the right one) of the next device and so on. The ring is closed by
connecting the RS232 interface of the last device to the free interface of the first
one, see Fig. 24.
K-1001
Connection sceme of three HPLC pumps K-1001
Description
Is activated by a 0 Volt or low signal or a short
circuit I = 10 mA
IN
OC (open collector) output is active for 500 ms
When receiving a 0 V (error) signal, the message
Error signal was detected is displayed and the
pump is stopped; I
OC output — active until the error condition is
removed
Analog voltage signal — Gives measured system
pressure (1 V per 40 MPa; Offset for 0 MPa is
some mV).
®
® ®
or EuroChrom , Preparative Version. All the devices
K-1001
= 10 mA
IN
®
or EuroChrom . For detailed
K-1001