Commercial Products  >  Draft Control
Relay Box

The Relay Box is a multiple-appliance relay control panel that allows you to interlock up to four appliances. Need to interlock more? You can simply add multiple ES 12s when wired in parallel.

The control requires an EBC modulating controller.


  • Can handle up to 4 appliances
  • ON and OFF operation of appliances can take place independently
  • LED terminals provide fail-safe supervision & easy troubleshooting
  • Flexible opto-couplers allows a terminal connection to accept 10-120V AC/DC


Power Supply 1 x 120VAC
Max Terminal Voltage 10-120 VAC/VDC
Operating Temperature -4°F to +122°F (-20°C to +50°C)
Control Relays (4) Max 8 Amp @ 230 VAC
EMC Standard Emission: EN50 081-1, Immunity: EN50 081-2
Insulation Class NEMA 1 (IP 20)
Warranty 2 Years
Listing Certification UL 378, Standard for Draft Equipment
UL 60947, Standard for Industrial Control Panels
CSA C22.2 No. 14-95, Standard for Industrial Control Equipment