KD Scientific 910 OEM Pump - Manual (Page 15)

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KDS Milliliter OEM Module
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The pump is set to the following default parameters on power-up and after an
external enable command.
DEFAULT SETTINGS
Syringe Diameter: 2.300 mm
Rate: 3.000 ul/min
Range: ul/min
Force: 100%
Address: 00
Baud Rate: 9600
I/O Specifications: Inputs
RUN/STOP
This is an active low, TTL level input, pulled up to +5V through a 10K ohm resistor. It is ESD
protected through a TVS device and filtered with a 0.1uF capacitor to ground. Each pulse to
a logic low toggles the pump between the RUN and STOP states.
EXT_ENABL/
This is an active low, TTL level input, pulled up to +5V through a 10K ohm resistor. It is ESD
protected through a TVS device and filtered with a 0.1uF capacitor to ground. A transition
from logic high to logic low causes the processor to reset to its default state and enables the
motor drive. A transition from logic low to logic high disables the motor drive through hard-
ware (independent of firmware). This input may be used for an emergency stop function.
**To enable pump, the unit or connector P7 pin 3, must be connected to ground**
Outputs
RUN_IND/
This is an active low output driven by two 74HCT14 inverters in parallel. An on-board resis-
tor may be placed in series with this output to provide current limiting. The default resistor
value is zero ohms. A logic low indicates RUN. A logic high indicates STOP.
INDICATORS:
Power-on LED
When illuminated, indicates that board is powered on and +5VDC supply is operating.
RUN LED
When illuminated, indicates that pump is running. When extinguished, indicates pump is
stopped.