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PLC 2050/2250/2500 PurifiCation SyStemS
| uSer’S GuiDe
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External Connections
additional external connectors, such as an rS-232 serial communication port (Com4),
Lan port, analog signal input, and input/output ports can be used to connect external
devices to the system.
rS-232 (COM4) pOrt
the rS-232 port can be used to control an external device via serial communication with
GGP Software, such as a CPC column, the GX-241 Liquid Handler, or an additional detector.
USB pOrtS
the uSB ports can be used to connect any uSB peripherals (keyboard, mouse, uSB stick,
printer, etc.) or optional acquisition module for additional detectors, or to control the
Verity 4020 Syringe Pump.
LaN pOrtS
the Lan port can be used to control the Verity 1910 mS Detector, or to make direct data
transfer to a private server.
aNaLOG SIGNaL INpUtS
the analog input connectors (red +, black -) can be used for signal acquisition of additional
detectors (-1 V
𝌂
; +1V
𝌂
). a 10-bit a/D converter on an electronic board allows to convert the
analog signal to digital signal for the plotting in the GGP Software.
eXterNaL CONtrOLS
the inputs 'Start in' and 'Stop in' can be used to start or stop the pump via a pulse (with
10 ma current limitation) or a closure of a no/nC contact (o>C) coming from an external
device (max. 5 V
𝌂
). the outputs are static relay contacts (max. 5 V
𝌂
). 'Start out' induces
a short closure of a contact no/nC (open>Close) at each starting of the pump (run/
resume). 'Stop out' induces a short closure of a contact no/nC at each stop of the pump
(Stop/Pause).
Figure 20
analog inputs, uSB Port, and i/o Ports
(Left Side)
analog Signal
inputs
uSB
Port
external
Controls
Figure 21
rS-232 and Lan Ports (right Side)
rS-232 Serial
Communications
Port (Com4)
Local area network
(Lan) Port
