Bio-Rad Model EP-1 Econo Pump - Manual (Page 24)

Appendix B
Operation of the Model EP-1 Econo Pump When
Connected to Other Instruments
The Model EP-1 Econo Pump provides a variety of output signals which
can be used to control the operation of non Bio-Rad fraction collectors, or
to communicate with non Bio-Rad UV monitors and recording devices.
Communication is accomplished through two standard 8-pin mini-DIN
sockets on the rear panel of the pump. The third socket is for the operation
of the Model SV-3 Diverter Valve (see Figure 4.2). Bio-Rad offers an
accessory breakout cable (System Cable 7), which has an 8-pin mini-DIN
connector at one end and loose wires on the other, for connection to other
instruments. Output signals are TTL compatible. To use these signals, you
must insure that the circuit external to the Model EP-1 Econo Pump does not
draw more than 15 milliamperes of current. The following table describes
the two rear panel mini-DIN connector pinouts.
Table B. Rear Panel Pinouts
Pinout Signal Type Pinout Signal Type
* Shield * Shield
1 Fraction Advance 1 Start/Enable
(low-going output) (output)
2 No Contact 2 No Contact
3 No Contact 3 Mark A (output)
4 No Contact 4 No Contact
5 Fraction Advance 5 No Contact
(high-going output)
6 No Contact 6 Pen (output)
7 Ground 7 Ground
8 Fraction Advanced Marks to 8 Mark B (output)
Recorder (low-going input)
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