Functional Devices Network Compatible Relays

RIBTW2401B-BC

Enclosed BACnet® MS/TP Network Relay Device; One Binary Output (20 Amp Relay SPDT + Override); One Binary Input (Dry Contact, Class 2); 24 Vac/dc or 120 Vac Power Input, Optional End of Line Resistor (EOL) Included.

Wiring Diagram:

Diagram shows connections for Binary Input (Dry Contact), MS/TP communication lines (A, B), 24 Vac/dc power, and relay contacts (Common, N/O, N/C). Includes DIP switches for Baud Rate, MS/TP Address, and Relay Override.

RIBTW2402B-BC

Enclosed BACnet® MS/TP Network Relay Device; One Binary Output (20 Amp Relay SPDT + Override); One Binary Input (Dry Contact, Class 2); 24 Vac/dc or 208-277 Vac Power Input, Optional End of Line Resistor (EOL) Included.

Wiring Diagram:

Diagram shows connections for Binary Input (Dry Contact), MS/TP communication lines (A, B), 24 Vac/dc or 208-277 Vac power, and relay contacts (Common, N/O, N/C). Includes DIP switches for Baud Rate, MS/TP Address, and Relay Override.

Image shows the physical unit with its enclosure, ports, and labeling.

SPECIFICATIONS

General Specifications

• # Relays & Contact Type: One (1) SPDT Continuous Duty Coil
• Expected Relay Life: 10 million cycles minimum mechanical
• Operating Temperature: -30 to 140° F
• Humidity Range: 5 to 95% (noncondensing)
• Operate Time: 18ms
• Green LED: Network Communication
• Red LED: Relay Status
• Dimensions: 4.00" x 4.00" x 1.80" with .50" NPT Nipple
• Wires: 16", 600V Rated
• Approvals: UL Listed, UL916, C-UL
• Housing Rating: UL Accepted for Use in Plenum, NEMA 1
• Gold Flash: No
• Relay Override Switch: DIP Switch Control
• Network Media: Twisted Pair 22-24AWG, shielded recommended
• Terminations: Functional Devices product installed at both ends of the MS/TP network - Use 120 Ω end of line resistors. All other cases - Follow instructions from the device installed at the end of the MS/TP network.
• Polarity: Network is polarity sensitive
• Baud Rate: 9600, 19200, 38400, 57600, 76800, 115200 (DIP Switch Selectable)

Contact Ratings

• 20 Amp Resistive @ 277 Vac
• 20 Amp Ballast @ 277 Vac
• 16 Amp Electronic Ballast @ 277 Vac (N/O)
• 10 Amp Tungsten @ 120 Vac (N/O)
• 1110 VA Pilot Duty @ 277 Vac
• 770 VA Pilot Duty @ 120 Vac
• 2 HP @ 277 Vac
• 1 HP @ 120 Vac

Power Input Ratings

• 81 mA @ 24 Vdc
• 111 mA @ 24 Vac
• 96 mA @ 120 Vac (RIBTW2401B-BC)
• 121 mA @ 208-277 Vac (RIBTW2402B-BC)

Power Input

• 24 Vac/dc; 120 Vac; 50/60 Hz (RIBTW2401B-BC)
• 24 Vac/dc; 208-277 Vac; 50/60 Hz (RIBTW2402B-BC)

BACnet® Details

• MS/TP Address & Baud Rate must be set prior to power up via DIP switches.
• Device ID will default to 277XXX where XXX is the MS/TP Address.
• Examples: MS/TP Address - 004, Device ID - 277004; MS/TP Address - 121, Device ID - 277121
• Device ID can be changed via network command. Once changed, it will no longer default to 277XXX. (MS/TP Address & Device ID must be unique.)
• This model utilizes: BO 1 (Relay output), BI 1 (Dry contact binary input).
• Device Instance changed via Object Identifier Property of Device Object
• PIC Statement available on website: http://www.functionaldevices.com/pdf/pics/RIBTW240xB-BC_PICS.pdf

DIP Switch Configuration

DIP Switches for Baud Rate and MS/TP Address

*0 = Open ; 1 = Closed

**Device must be powered for override

All other combinations = 9600 baud

Notes

• When connecting 24 Vac to both the RIB(s) and a half-wave device, damage to device can occur. Option 1: Use separate transformers for each device. Option 2: Add diode between devices, see Option 2 note below.

Diagram illustrates Option 2 for 24 Vac interconnection with a diode.

Binary Input Usage

Dry contact binary input is a general purpose input that is not tied to the relay internally. Can be used with any dry contact switching device, such as a current sensor, to report back to the network.