Functional Devices RIBMNLB : AHU Fan Safety Alarm Circuit, 24 Vac/dc Power Input, 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: 250mS
Power Input: 4 Amp Max @ 24 Vac/dc ; 50-60 Hz
Alarm Status: LED On = Activated
Dimensions: 6.000" x 2.750" x 1.200"
Track Mount:
MT212-6 Mounting Track Provided
Approvals: UL Listed, UL864, C-UL, CE, RoHS, CSFM
Housing Rating: UL Listed, NEMA 1, C-UL, CE
Gold Flash: No
Override Switch: No
RIBMNLB has four Alarm Inputs and one Master Alarm.
A master relay will open if any one of the normally-closed (N/C) inputs open. LED status of all outputs and the master relay is provided. The RIBMNLB is provided with mounting track for mounting in user-provided electrical enclosures. The RIBLB 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 two general-purpose outputs: one 24 V output terminal and one dry contact output rated up to 10 Amp @ 277 Vac. Fan status contact controls actuator power. The most common applica- tion 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.
Model RIBMNLB combines all the relay logic to facilitate fan status, fan safety control, and damper actuator control. It is intended for use in a circuit that will control fan start/stop and fan safety shut-down circuit monitors three critical inputs:
- Low-limit freeze protection (to stop fan and remove power from damper actuator)
- Static pressure (to monitor for hi/low pressure condition)
- Smoke detector / fire alarm
Master relay opens to shut down AHU when any Normally Closed input opens.
Data Sheets
- Mounting:
- Enclosed
- Number of Relays:
- 5
