13
Figure 9
C.
Pump Operation
Manual and On/Off Control
The pumps can be operated manually by pressing the stop/start key from the wait mode. Once
pressed, the pump will begin to operate at the stroke rate shown on the display. From here, the
up and down keys can be used to change the stroke rate, and the stroke length knob can be
adjusted down to further reduce the pump output.
Once adjusted/calibrated to the desired flow rate, the pump can be left in manual mode for
on/off control via power (connecting/disconnecting AC power from an external source) or for
on/off control via the stop/start input. Pressing the stop/start key will go back to the wait mode.
External Control
Pressing the stop/start key and the down key simultaneously from the wait mode will set the
pump to operate in external mode. In this mode, the pump will operate at a speed correlating to
the frequency of digital inputs that it receives (see section 3.2 for wiring inputs). If used, the
stop/start input will override the digital input signals.
If at any time in external mode the up and down keys are held down simultaneously, the pump
will manually run at 360 SPM as long as the two keys are held down. This feature is useful for
priming or the elimination of air trapped in the pump or tubing.
Pressing the stop/start key will disable external control and go back to the wait mode.
3.2
External Inputs & Outputs
The EW and EK pumps are capable of being controlled by an external pulse proportional input
as well as being controlled by an external stop/start signal. Additionally, the EW pumps have
two contact closure relay outputs – one output is ynchronous with the pump frequency and the
other is tied to the external stop/start signal.
A.
EW Pumps and the ‘F’ control module
Two circular mini-DIN female connectors are used to make these connections. Figure 9 shows
the mating connections on the back of the pump. Connector 1 is a 5-PIN standard-key connector
(P/N E90495) and Connector 2 is a 4-PIN reverse-key connector (P/N E90494).
CONNECTOR 1:
PIN
FUNCTION
1
Voltage In (24VDC max)
2
External Digital Input
3
Out 2 (Synchronous with stroke)
4
Out 1 (Stop output)
5*
Common
CONNECTOR 2:
PIN
FUNCTION
1
Stop/Start Input
2
Pre-Stop Input
3
Not Used
4
Common
1
3
4
2
1
5
3
4
2
Connector 1
Connector 2
*Note: The center pin is marked as ‘5’ for
easy identification purposes throughout the
manual. Actual marking on the part may
be any capital letter (mold cavity ID) or the
number ‘5’.
