ALTERNATING RELAYS

Alternating Relays equalize run times to increase equipment life and provide additional capacity. The alternating action is typically initiated by a control switch such as a float switch or pressure switch. Each time the initiating switch is opened, turning off a load, the alternating relay will change state, thus alternating the multiple loads.

Control the Run Time of Redundant Loads

Alternating relays are used in redundant load applications to equalize run times. These relays can also be used to run multiple loads simultaneously when additional capacity is needed. Duplex Controllers are used for S.O.S.O. operation, with three switch input and alternation of which pump is turned on first. If you need help picking the right relay, contact us.

 

DUPLEX CONTROL, PLUG-IN

ARP Series Relays ensure that multiple loads get equal run time by alternating between two loads. In a typical application, an idle standby unit is available in case the first unit fails. Alternating relays prevent deterioration of the idle unit by equalizing run time

S.O.S.O. OPERATION, PLUG-IN

ARP Duplex Series Relays combines functions of alternating relays, control relays & auxiliary contacts in one unit. The device offers sequence on – simultaneous off (S.O.S.O.) Operation with three float switch inputs. 

DUPLEX CONTROL, FLANGE

ARF Series Relays ensure that multiple loads get equal run time by alternating between two loads. The flange mounted enclosure is used for inner-door mounting. A back-mounted socket is included with the relay.

TRIPLEX CONTROL, PLUG-IN

ATP Series Relays control up to three loads with three switch input:  LEAD, LAG and LAG2. An optional top-mounted switch allows use as a Duplex relay until system expansion requires an additional third load. 

Enclosure Style
AR_Enclosure
  • Plug-in (38)
  • Flange enclosure designed for deadfront door-mounting (10)
  • 12 Pin Square (6)
Function
AR_Function
  • Duplex (48)
  • Triplex (6)
Output
AR_Output
  • Duplex DPDT Cross-Wired w/ Selector Switch (Control Voltage pins 3 and 6) (8)
  • Duplex SPDT w/ Selector Switch (8)
  • Duplex DPDT (4)
  • Duplex DPDT Cross-Wired (Control Voltage pins 3 and 6) (4)
  • Duplex DPDT Cross-Wired (Control Voltage pins 5 and 6) (4)
  • Duplex DPDT Cross-Wired w/ Selector Switch (Control Voltage pins 5 and 6) (4)
  • Duplex DPDT w/ Selector Switch (4)
  • Duplex Sequence On - Simultaneous Off w/ Selector Switch (4)
  • Duplex SPDT (4)
  • Duplex DPDT Cross-Wired; Square Socket (Control Voltage pins 3 and 7) (2)
Control Voltage
AR_Control_Voltage
  • 120V AC (17)
  • 24V AC/DC (17)
  • 12V AC/DC (10)
  • 240V AC (10)
Standard Modifications
AR_Standard_Mods
  • Switch to select normal alternation or lock loads 1 or 2 (34)
  • None (20)

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ARF Duplex

Function: 

Duplex

Control Voltage

120V AC

Output:

Duplex Sequence On – Simultaneous Off w/ Selector Switch

Enclosure Style:

Flange enclosure designed for deadfront door-mounting

Standard Modifications:

Switch to select normal alternation or lock loads 1 or 2

ARF Duplex

Function: 

Duplex

Control Voltage

24V AC/DC

Output:

Duplex Sequence On – Simultaneous Off w/ Selector Switch

Enclosure Style:

Flange enclosure designed for deadfront door-mounting

Standard Modifications:

Switch to select normal alternation or lock loads 1 or 2

$208.89

ARP Duplex Series

Function: 

Duplex

Control Voltage

240V AC

Output:

Duplex DPDT Cross-Wired (Control Voltage pins 5 and 6)

Enclosure Style:

Plug-in

Standard Modifications:

None

$126.21

ARP Duplex Series

Function: 

Duplex

Control Voltage

240V AC

Output:

Duplex DPDT Cross-Wired w/ Selector Switch (Control Voltage pins 3 and 6)

Enclosure Style:

Plug-in

Standard Modifications:

Switch to select normal alternation or lock loads 1 or 2

$133.72

ARP Duplex Series

Function: 

Duplex

Control Voltage

240V AC

Output:

Duplex DPDT Cross-Wired w/ Selector Switch (Control Voltage pins 5 and 6)

Enclosure Style:

Plug-in

Standard Modifications:

Switch to select normal alternation or lock loads 1 or 2

$133.72

ARP Duplex Series

Function: 

Duplex

Control Voltage

240V AC

Output:

Duplex SPDT

Enclosure Style:

Plug-in

Standard Modifications:

None

$122.16

ARP Duplex Series

Function: 

Duplex

Control Voltage

240V AC

Output:

Duplex SPDT w/ Selector Switch

Enclosure Style:

Plug-in

Standard Modifications:

Switch to select normal alternation or lock loads 1 or 2

$130.00

ARP Duplex Series

Function: 

Duplex

Control Voltage

120V AC

Output:

Duplex Sequence On – Simultaneous Off w/ Selector Switch

Enclosure Style:

Plug-in

Standard Modifications:

Switch to select normal alternation or lock loads 1 or 2

$157.85

ATP Series Triplex

Function: 

Triplex

Control Voltage

24V AC/DC

Output:

Triplexor / Duplexor w/ Selector Switch

Enclosure Style:

Plug-in

Standard Modifications:

Switch to select normal alternation or lock loads 1 or 2

$275.29

ATP Series Triplex

Function: 

Triplex

Control Voltage

24V AC/DC

Output:

Triplexor / Duplexor w/ Selector Switch; Square 12 pin base

Enclosure Style:

12 Pin Square

Standard Modifications:

Switch to select normal alternation or lock loads 1 or 2

$315.26

ATP Series Triplex

Function: 

Triplex

Control Voltage

120V AC

Output:

Triplexor / Duplexor

Enclosure Style:

Plug-in

Standard Modifications:

None

$256.72

ATP Series Triplex

Function: 

Triplex

Control Voltage

120V AC

Output:

Triplexor / Duplexor w/ Selector Switch

Enclosure Style:

Plug-in

Standard Modifications:

Switch to select normal alternation or lock loads 1 or 2

$275.29

Frequently Asked Questions About Alternating Relays

 
 

Alternating Relay Downloads

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