Functional Devices RIBMNLB-2 : AHU Fan Safety Alarm and General Purpose Logic Circuit, 24 Vac/dc Power Input, 2 Alarm Inputs all with N/C Outputs, 2.75" Track Mount
Specifications
Expected Relay Life: 10 million cycles minimum mechanical
Operating Temperature: -30 to 140° F
Humidity Range: 5 to 95% (noncondensing)
Operate Time: 8ms
Power Input: 4 Amp max. @ 24 Vac/dc ; 50-60 Hz
Alarm Status: LED On = Activated
Dimensions:
6.200" x 2.750" x 1.750" (RIBMNLB-6NO)
4.600" x 2.750" x 1.750" (RIBMNLB-4NO)
3.000" x 2.750" x 1.750" (RIBMNLB-2NO)
Track Mount:
MT212-6 Mounting Track Provided (RIBMNLB-6NO)
MT212-4 Mounting Track Provided
(RIBMNLB-4NO, RIBMNLB-2NO)
Approvals: UL Listed, UL916, UL864, C-UL, CE, RoHS, CSFM
Housing Rating:
UL Listed, NEMA 1, C-UL, CE Approved,
UL Accepted for Use in Plenum
Gold Flash: No
Override Switch: No
RIBMNLB-2 has two Alarm Inputs and one Master Alarm.
The RIBMNLB-2 is a simple device that combine a common relay-logic function into a small, easy-to- install, and less expensive form.
A master relay will open if any one of the normally-closed (N/C) inputs open. There are six, four, or two inputs depending on the model chosen. LED status of all inputs, the master relay, and power input
is provided. Bypass of un-used inputs is also provided. The RIBMNLB series is provided with mounting track for mounting in user-provided electrical enclosures. The RIBLB series is enclosed in a NEMA-1, 4" x 7" enclosure with a clear lid to allow viewing of the status LEDs. The master relay has three general-purpose outputs: two 24 V output terminals and one dry-contact output rated up to 10 Amp @ 277 Vac (terminals on RIBMNLB series, wires on RIBLB series.) The most com- mon application is an Air Handling Unit (AHU) fan-safety-shutdown where the master relay is used to shutdown the fan. Contact closure outputs are provided so that a DDC controller can determine the cause of a shutdown.
Data Sheets
- Mounting:
- Track Mount
- Number of Relays:
- 3
