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RIBTW2402SB-LN-NC-P1 | Functional Devices | Relays & Contactors

LON 20A SPST-N/C 24VAC/DC/208-277VAC W/1 DI, HOA

Manufacturer:Functional Devices



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product family specifications

Supply Voltage

24 VAC @ 111 mA, 24 VDC @ 81 mA, 120 VAC @ 96 mA

Contact Rating

20A resistive @ 277 VAC, 20A ballast N.O. @ 120/277 VAC, N.C. @ 277 VAC, 10A tungsten N.O. @ 120 VAC, 1110 VA pilot duty @ 277 VAC, 770 VA pilot duty @ 120 VAC, 2 hp @ 277 VAC, 1 hp @ 120 VAC


50/60 Hz

Relay Type



Continuous duty

Life Expectancy

10 million cycles minimum

Baud Rate

9600, 19200, 38400, 57600, 76800, and 115200

LED Indication

Green: network status, Red: relay status

Operating Temperature

-30° to 140°F (35° to 60°C)

Operating Humidity

5% to 95% non-condensing

Housing Type

NEMA 1, plenum rated

Conduit Hub

1/2" NPT


4" H x 4" W x 1.8" D (10.2 x 10.2 x 4.6 cm); 1/2″ NPT nipple


UL listed file #E68805, CE certified, BACnet certified


0.83 lb (0.38 Kg)


1 year

product family features

  • Enclosed BACnet relay with 20A contacts
  • Additional dry contact input (powered by Class 2 circuit)
  • LED indication of network status and relay status
  • UL listed and BACnet compatible, CE

more information & related documents

Family Description

The Functional Devices Model RIBTW2401B-BC and RIBTW2402B-BC BACnet Relay in a Box are open-protocol relays controlled from a remote location using a BACnet network. The relay is powered locally, and communication with the network is over a twisted pair of wires. Using standard BACnet objects, the relay can be commanded on and off over the network and the relay state communicated back. A separate digital input is provided to communicate the status feedback signal from a current switch (or other switched feedback device) to the BACnet network.

Kele Description

LON 20A SPST-N/C 24VAC/DC/208-277VAC W/1 DI, HOA


Functional Devices

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