Protection Relays
Alternating Relays
ARP SERIES
Alternating Relay
Description
The ARP Series is used in systems where equal run time for
two motors is desirable. The selector switch allows selection
of alternation or for continuous operation of either load. LED’s
indicate the status of the output relay. This versatile series may
be front panel mounted (BZ1 accessory required) or 35 mm DIN
rail mounted with an accessory socket.
8-PIN
Operation
Alternating: When the rotary switch is in the “alternate”
position, alternating operation of Load A and Load B occurs upon
the opening of the control switch S1. To terminate alternating
operation and cause only the selected load to operate, rotate
the switch to position “A” to lock Load A or position “B” to lock
Load B. The LEDs indicate the status of the internal relay and
which load is selected to operate.
11-PIN
Note: Input voltage must be applied at all times for proper
alternation. The use of a solid-state control switch for S1 may
not initiate alternation correctly. S1 voltage must be from
the same supply as the unit’s input voltage (see connection
diagrams). Loss of input voltage resets the unit; Load A
becomes the lead load for the next operation.
Wiring Diagram
SPDT 8-PIN
DPDT 11-PIN
L1
N/L2
L1
N/L2
Duplexing (Cross Wired): Duplexing models operate the same
as alternating relays and when both the Control (S1) and Lag
Load (S2) Switches are closed, Load A and Load B energize
simultaneously.
The DPDT 8-pin, cross-wired option, allows extra system load
capacity through simultaneous operation of both motors when
needed. Relay contacts are not isolated.
DPDT 8-PIN CROSS WIRED
Relay contacts in above are isolated.
L1
N/L2
Features & Benefits
V = VOLTAGE
LA = LOAD A
FEATURES
BENEFITS
Alternating or
electrically locked
operation
LB = LOAD B
S1 = PRIMARY CONTROL SWITCH
S2 = LAG LOAD SWITCH
Flexibility to run unit alternating between the two
loads as normal or lock the relay to one specific load.
Low profile
selector switch
Prevents accidental actuation
LED status indication
Visual indication of which load is engaged
Flexibility to use in many applications
Industry standard
base connection
Ordering Information
LINE
OUTPUT
MODEL
DESCRIPTION
VOLTAGE
FORM
SPDT
DPDT
SPDT
SPDT
DPDT
DPDT
DPDT
SPDT
DPDT
DPDT
AR120A-3095 120VAC
8 pin for alternating applications. Rotary switch allows user to lock internal relay to one specific load.
8 pin cross wired for duplexing applications. Rotary switch allows user to lock internal relay to one specific load.
8 pin for alternating applications.
ARP23S
ARP41
24VAC
120VAC
120VAC
120VAC
120VAC
120VAC
230VAC
230VAC
230VAC
ARP41S
ARP42S
ARP43
8 pin for alternating applications. Rotary switch allows user to lock internal relay to one specific load.
11 pin for alternating applications. Rotary switch allows user to lock internal relay to one specific load.
8 pin cross wired for duplexing applications.
ARP43S
ARP61S
ARP62S
ARP63S
8 pin cross wired for duplexing applications. Rotary switch allows user to lock internal relay to one specific load.
8 pin for alternating applications. Rotary switch allows user to lock internal relay to one specific load.
8 pin cross wired for duplexing applications. Rotary switch allows user to lock internal relay to one specific load.
8 pin cross wired for duplexing applications. Rotary switch allows user to lock internal relay to one specific load.
If you don’t find the part you need, call us for a custom product 800-843-8848
© 2016 Littelfuse Protection Relays & Controls
www.littelfuse.com/arp
Rev: 1-A-062116