Bio-Rad BioLogic LP System - Manual (Page 22)

2.6 NON-BIO-RAD SYSTEM OPTIONS
Non-Bio-Rad fraction collectors and chart recorders may be used with the BioLogic LP, as discussed in the
following sections.
Figure 8. Pin Assignments for BioLogic LP’s Fraction Collector and Chart Recorder Connectors
2.6.1 Non-Bio-Rad Fraction Collectors
A non-Bio-Rad collector may be used with the BioLogic LP, providing its tube advance function can be initiat-
ed by a TTL signal with a duration of 100 milliseconds or greater.
Use System Cable 7 to connect a non-Bio-Rad fraction collector. Pin-outs for the BioLogic LP’s Fraction
Collector port are listed below and shown in Figure 8. Pin 5 is the TTL control wire, and pin 7 is the logic
ground. A wire color to pin number chart is included with System Cable 7. See the pin-out information in
your collector manual.
• Pin 1: The function of this pin differs, depending on your selection in Manual mode operation of the
fraction collector. (See Table 7, Manual Mode Operation: Fraction Collector for details on selecting a
fraction collector.) Manual mode offers the following selections:
Other or 2128: The BioLogic LP software allows you to select “Other” when indicating a non-Bio-
Rad fraction collector. (Selecting 2128 functions similar to Other.) In this mode, this pin is normally
“low” (0 volts). It goes “high” (5 volts) for 100 milliseconds when a tube change is commanded.
2110: When the Model 2110 fraction collector is selected, this pin is normally “high” (5 volts). It
goes “low” (0 volts) for 100 milliseconds when a tube change is commanded.
• Pins 2 - 4: Not connected.
• Pin 5: The function of this pin differs, depending on your selection in Manual mode operation of the
fraction collector. (See Table 7, Manual Mode Operation: Fraction Collector for details on selecting a
fraction collector.) Manual mode offers the following selections:
Other or 2128: When Other (or Model 2128) fraction collector is selected, this pin is normally
“high” (5 volts). It goes “low” (0 volts) for 100 milliseconds when a tube change is commanded.
2110: In this mode, this pin is normally “low” (0 volts). It goes “high” (5 volts) for 100 milliseconds
when a tube change is commanded.
• Pin 6: Not connected.
• Pin 7, Digital Ground: This is the “ground reference” pin for all control inputs and outputs on this
connector.
• Pin 8, Event Mark In: This pin is normally high (5 volts). When an external device such as a frac-
tion collector pulls it “low” for 100 milliseconds or more, the BioLogic LP generates an event mark on
the analog output to the Chart Recorder’s channel 1.
15
Description of Components
UV
CHART
COND
CHART
UV
OPTICS
COND
FLOWCELL
BYPASS
VALVE
GRADIENT
MIXER
BUFFER
SELECTOR
DIVERTER
VALVE
INSTR.
BUS
AUX
FRACTION
COLLECTOR
UV LAMP 12 V
8 7 6
5 4 3
2 1