ARP120A2R - 

Macromatic's Alternating Relays are used in special applications where the optimization of load usage is required by equalizing the run time of two loads. Each time an initiating switch is opened, the output relay contacts will change state, thus alternating the two loads.
Features:

Low Profile Selector Switch to Lock in One Sequence

Standard 11-Pin Octal Socket Mounting

2 LEDs Indicate Relay Status

Specifications:

SPDT or DPDT Cross-Wired 10 A @ 240 VAC/30 VDC

Dimensions: 1.7"D × 2.4"W × 3.1"H

Temperature: –28°C to +65°C

Description of Function:
In the off state, the Control Switch is open, the Alternating Relay is in the LOAD A position, and both loads (M1 & M2) are off. When the Control Switch closes, it energizes the first load (M1). The red LED marked "LOAD A" glows. As long as the Control Switch remains closed, M1 remains energized. When the Control Switch opens, the first load (M1) is turned off and the Alternating Relay toggles to the LOAD B position. When the Control Switch closes again, it energizes the second load (M2). The red LED marked "LOAD B" glows. When the Control Switch opens, the second load (M2) is turned off, the Alternating Relay toggles back to the LOAD A position, and the process can be repeated again.