Time Mark 471 Data Sheet

MODEL 471

TIME MARK is a division of

6.06"

2.08" 2.70"

5.5"

3.88" 3.0"

.187" dia. typ.

OUTPUT CONTACTS

INPUT CONTACTS

COM

Multi-Stage

Alternator

 Replaces Mechanical Alternators

 User Selectable for:

• Single Pump

• Two Pump (duplex)

• Three Pump (triplex)

• Four Pump (quadraplex)

DESCRIPTION

The Model 471 Multi-Stage Alternator is designed to
control the operating sequence of multi-stage pumping
systems. It can also be used to maintain the desired level
of pressure-on air compressor systems. Four PUMP
SELECT DIP switches located on the front panel allow the
alternator to control a single-pump, two-pump, three-pump
or four-pump system. Only one switch needs to be set for
the total number of pumps in the system.

The Model 471 will assure that only the necessary pumps
are operating, and that the run time for each pump is

approximately equal. Pumps are sequenced “first-on, first-
off”. If the pumping demand requires only one pump at a

time, the alternator will start the next pump in sequence
each time an input switch is closed. Input switches may be
float switches, pressure switches, flow switches, etc., as
required by the application.

Potential uses for the Model 471 include water supply
systems, sewage disposal plant systems, storage tank
filling systems, air compressor systems, irrigation and
water recycling systems.

SPECIFICATIONS

MODEL A471 B471 C471 D471

Input Voltage 24VAC

60Hz

Power Consumption

Transient Protection 2500 VRMS for 10ms

Minimum Cycle Time 100ms

Contact Rating SPST 2A at 240VAC resistive

Input Contact Requirement

Expected Relay Life Mech: 10 million operations

Elec: 100,000 ops at rated load

Operating Temperature - 20º to +140º F

Humidity Tolerance 0 - 97% w/o condensation

Enclosure Material ABS plastic

Weight 1.2 lbs.

120VAC

60Hz

0.5 watts max.

0.001 amp at 12VDC

240VAC

60Hz

24VDC

DIMENSIONS

© 2011 TIME MARK CORPORATION

11/2011

To Motor Controls

AC IN

MODEL 471

TIME MARK is a division of

Multi-Stage Alternator

READ ALL INSTRUCTIONS BEFORE INSTALLING, OPERATING OR SERVICING THIS DEVICE.

KEEP THIS DATA SHEET FOR FUTURE REFERENCE.

POTENTIALLY HAZARDOUS VOLTAGES ARE PRESENT AT THE TERMINALS OF THE MODEL 471.

ALL ELECTRICAL POWER SHOULD BE REMOVED WHEN CONNECTING OR DISCONNECTING WIRING.

THIS DEVICE SHOULD BE INSTALLED AND SERVICED BY QUALIFIED PERSONNEL.

INSTALLATION

Mount the Model 471 in an appropriate enclosure or panel.

Connect AC power connections to the terminals marked AC
IN. Do not apply power until all other connections are made.

Connect the input switches (float, pressure, etc.) to the
terminals marked INPUT CONTACTS.

One side of each input switch is connected to the common
terminal; the other side should be connected to the input
terminals, starting with terminal 1.

Terminal 1 will be the first selected for either the pump up or
the pump down application. See the TYPICAL APPLICATION
diagram.

Connect the control circuits of the pumps or motors to be
alternated to the terminals marked OUTPUT CONTACTS,
again beginning with terminal number 1. Refer to the
TYPICAL APPLICATION diagram.

ADJUSTMENT

Set one of the four PUMP SELECT DIP switches to the ON
position, to indicate the total number of pumps or motors in the
system. For example, for a 4 pump system, set the number 4
DIP switch to ON.

For a 2 pump system, set only switch 2 to ON. This limits the
alternator to the first two outputs. If more than one switch is
set to ON, the lowest numbered switch takes priority.

If a pump or motor must be removed for servicing or
replacement, shift the higher numbered input and output
connections towards the number 1 terminal, to fill in any gaps
in the switching process.

PUMP DOWN APPLICATION

In a “Pump Down” application, the switches are normally­open. As the liquid level rises, the number 1 level switch
closes, turning on the first pump. If the level continues to rise,
additional pumps are turned on.

As the level drops, the pumps or motors are turned off on a
first-on/first-off basis. When the low level switch opens, the
Model 471 alternates to the next pump for the next operating
cycle. Switch number 1 determines when alternation occurs.

GENERAL SAFETY

Installation Instructions

PUMP UP APPLICATION

In a “Pump Up” application, the switches are normally-closed.
When the reservoir is full, the switches will be open. As the
liquid level drops the number 1 level switch closes, turning on
the first pump. If the level continues to drop, additional pumps
are turned on.

When the level rises above the number 1 switch, the switch
opens, turning off the pump. The Model 471 then alternates to
start the next pump in line for the next operating cycle. The
number 1 switch determines when alternation occurs.

WARRANTY

This product is warranted to be free from defects in materials
and workmanship for one year. Should this device fail to
operate, we will repair it for one year from the date of
manufacture. For complete warranty details, see the Terms
and Conditions of Sales page in the front section of the Time
Mark catalog or contact Time Mark at 1-800-862-2875.

TYPICAL APPLICATION

11/2011

© 2011 TIME MARK CORPORATION