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Instruction Manual
11.
Low-Level Connector (3-Pin)
:
This connector is for the connection of a Low-
Level Sensor (49246) or a Dual-Level Sensor
(49249). The Tank Empty input connections
are always active for all models in all functional
modes. The Tank Low input connections are
always active for models equipped with dual
level functionality (AD8, AD9). If the fluid level
drops below the top float on a Dual-Level
Sensor, the Low-Level Indicator Light will turn
yellow. If the fluid level drops below the float on a
Low-Level Sensor, or the bottom float on a Dual-
Level Sensor, the Low-Level Indicator Light will
turn red, and the pump will stop. The pump is
designed to recognize an open circuit as full and
a closed circuit as low or empty. There is a five
second delay between triggering the sensor,
and the pump’s reaction. This is intended to
avoid triggering during refilling your supply tank.
The pin functions are as follows:
1. Tank Empty Signal
3. Tank Low Signal
4. Ground/Return Connection
12.
Flow Monitor / Meter Connector (4-Pin)
:
This connector will be used with a Milton Roy
flow meter or the Milton Roy DIGI-PULSE™ flow
monitor (FM-ROY-9). The pin functions are as
follows:
1. Flow Meter In – A closure between this pin
and ground registers a pulse for the flow
meter/monitor.
2. 24 Volt 75 mA* Supply – Supply voltage for a
Milton Roy flow meter.
3. Ground/Return Connection – Common ground
4. Flow Meter Sense – The condition of this pin will
set the pump into the Digipulse or Flow Meter
mode. This will automatically occur when the
Milton Roy device is connected. A connection to
ground indicates the use of a flow meter, while
an open circuit indicates a flow monitor.
Note:
The total current output of the 5-pin and 4-pin
connectors should not exceed 75 mA.
SECTION 3 - OPERATION
