The Macromatic ATP120A7R is an alternating relay. This 12 Pin plug-in relay has a control voltage of 120V AC. It is a triplexor relay used in situations in which the run time of three loads needs to be balanced and more capacity is necessary. It has an output of 3A SPNO, and works with 3 switch inputs (LEAD, LAG, LAG2). It can be used as a duplexor until triplexor operation is warranted. Operation is chosen by selector switch. The selector switch can also lock the relay into a certain load, with that load energizing first. It uses a 12 pin SD12-PC square socket. Note: 8 Pin plug in shown. Refer to drawings.

Specifications

Relay Function- Alternating Relay, Triplexor w/ Switch
Control Voltage- 120V AC
Output- (3) 3A SPNO
Voltage Tolerance- +10/-15% at 50/60Hz (AC); +10/-15% of control voltage (DC)
Load- <2VA
Operating Temperature- -28 C to 65 C (-18 F to 149 F)
Storage Temperature- -40 C to 85 C (-40 F to 185 F)
Output Contacts- (3) SPNO 3A @ 24/120V AC General Purpose; C300 Pilot Duty; 1/6 HP @ 24/120V AC
Life- Mechanical: 10,000,000 Operations, Full Load: 100,000 Operations
Dimensions- 2.4" Height x 1.7" Width x 3.9" Depth
Approvals- C UR US, C UL US (with Socket)

The ATP120A7R has 3 LEDs that display which load energizes first. All three LEDs will blink in the event of an out-of-sequence switch. If power fails and comes back with more than the LEAD switch closed, a 10 second delay between energizing the loads will prevent all three from coming back at once.

Macromatic ATP Series Relay Installation Manual

ATP120A7R Macromatic 120V 12 Pin Plug In Relay