Next Advance SP2200 - Manual (Page 44)

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SP2200Programmable Syringe
Pump
Publication #1200-02 39 04/29/10
This configuration can be used with a contact closure timer or in an automation setup,
allowing logic level control over the operation of the pump.
Start Only: Falling edge starts the Pumping Program. This configuration only allows the starting of the
Pumping Program. This would be useful, for example, with a laboratory animal trained to
press a lever. The animal can start the Pumping Program, but repeated presses would have
no affect until the Pumping Program permits it.
Start Only Reversed: Same as ‘Start Only’, but operates on the Rising edge to start the Pumping Program.
Stop Only: Falling edge Stops the Pumping Program. This configuration only allows the
stopping/pausing of the Pumping Program. This would be useful, for example, with an end
of travel limit switch. Also, this switch can be used as a power on homing switch.
Stop Only Reversed: Same as ‘Stop Only’, but operates on the Rising edge to stop the Pumping Program.
Pump Motor Operating (Pin 7): This output provides an external signal indicating when the pump motor is
operating. This pin is configured with the ROM setup command. When set to 0, the output is only at
logic high when the motor is operating (pumping). When set to 1, the output is logic high when the motor is
operating or when the Pumping program is executing a pause timer. Otherwise, the output is a logic low.
Pumping Direction Controls (Input: Pin 3; Output: Pin 8): Allows bi-directional control of the pumping
direction. The input pin, when activated, can be used to change the pumping direction. This function,
therefore, is only applicable when the pumping direction change is applicable. The function of the input pin is
configured with the "DIN " command.
When the mode is set to reciprocating pumps (DIN 0), then if the current pumping direction is withdraw, a
falling edge sets the direction to infuse. If the current pumping direction is infuse, a rising edge sets the
direction to withdraw. Otherwise, this input pin has no affect.
When the mode is set to dual pumps (DIN 1), then if the current pumping direction is withdraw, a rising edge
sets the direction to infuse. If the current pumping direction is infuse, a falling edge sets the direction to
withdraw. Otherwise, this input pin has no affect.
Dual and reciprocating pumping systems are created using 2 pumps attached with the accessory cable CBL-
TTL-1.
The output pin provides an output signal to external devices indicating the direction of pumping. A logic low
indicates withdraw, and a logic high indicates infuse. For example, this pin can be used to control an external
valve, allowing the syringe to refill from a reservoir.
Sub-Program Selector Switch Interface
For use with FUN PRI and FUN PRL Pumping Program functions.
Attach a Hex output selector switch to Expansion Connector Pins 1 to 5 (as needed) with Pin 1 as LSB.
Pins 1 to 5 (LSB to MSB) are interpreted as a 5 bit inverted hex number when the sub-program is selected.
Open connections are read as 0’s, while closed connections (shorted to ground) are read as 1’s. With nothing
connected, sub-program 0 will be selected. With Pins 1 to 5 shorted to ground, sub-program 31 will be
selected.