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Caution: External 24 VAC power source must be
isolated from ground.
2. Route the power cable through a cable strain relief on the left side of the connection box
(Figure 4).
3. Connect the green ground wire to a chassis screw or bolt, preferably using a ring terminal. See
Figure 4.
4. Route the control cable through the right cable strain relief (Figure 4).
5. Connect control cable according to Table 1.
The connection box power and control line descriptions are shown below.
Table 1: Connection box—power and control lines
Cable or Terminal (Figure 5) LED
indicator
(Figure 6)
Function
Power Cable (contains 3, 18 AWG
wires)
This cable provides power to the Dripmaster. Using the
selector switch and appropriate terminal block, for line power
(115 VAC or 220 VAC) or 24 V AC/DC can be supplied.
Control Cable (contains 8, 22 AWG
wires):
Input and output control or status signals are routed through
this cable.
24VAC/DC S.B. – Pre-lube
mode
SB
When applying 24 V AC/DC to these terminals, the
Dripmaster switches to the Pre-lube (pump off) mode. The
Dripmaster rate is 2 dpm in this mode. The SB LED (item 3
in Figure 6 also lights. See page 13).
LL – Total lack of oil
OIL
A dry contact that closes when a total lack of oil condition
occurs. The OIL LED (item 1 in Figure 6) also lights. See
page 13.
PULSE – Drip indication
DRIP
A dry contact that transmits the drip rate. The contact closes
for every drop fed to the line-shaft. The DRIP LED lights
momentarily whenever an oil drop passes through the
Dripmaster.
O.K. – Sufficient lubrication
1
OK
A dry contact that closes when sufficient oil is present. This
contact closes when the OK LED (item 2) in Figure 6 lights.
See page 13.
1
In the Pre-lube (pump off) mode, the OK contacts are always closed.
During the transition period from the 2 dpm Pre-lube mode to the preset Normal (pump on) drip rate settting (20 to 40
dpm), the OK relay is not energized (contacts open and OK LED is off) since the 15 dpm threshold has not yet been
reached. In order to signal to the SCADA room that the Dripmaster is functioning normally during this transition period
(from 2 dpm to the preset value), the OK contacts of the external time delay relay should remain closed for
approximately four minutes. In case of a total lack of oil (e.g., empty oil tank) the LL contacts close, and the OIL LED
turns on.