Reliable Products Trustworthy People Shaft Speed Switches Key Features • Works with remote / external pulse frequency NPN output sensor. For PNP option, contact Electro-Sensors. • Over-speed or under-speed configuration, 1-1,000 rpm • 1 SPDT relay output (LRB1000) or 2 SPDT relay outputs (LRB2000) • Visual setpoint adjustment with digital accuracy • Dial-in calibration does not require power • Built-in start delay • DIN rail mounting simplifies installation • 115, 230 VAC (50-60 Hz) and 12, 24 VDC power options • Optional explosion proof enclosure • Optional NEMA 4, NEMA 4X, or NEMA 12 enclosure kit The LRB1000 (single relay, 1 setpoint) and LRB2000 (double relay, 2 setpoints) shaft speed switches are an efficient way to continuously monitor machine RPM and provide relay protection upon detection of an unwanted change in speed or stoppage of the monitored shaft. A shaft-mounted pulser disc or pulser wrap generates an alternating magnetic field that is picked up be the sensing head. The sensor transmits this speed signal as a digital pulse (frequency) to the switch via a 3-conductor shielded cable. The LRB decodes this frequency signal to determine shaft speed and compares this to the pre-adjusted setpoint(s). The relay output(s) can then be used for equipment shutdown or to provide an alarm, assuring machine protection and process integrity. LRB Speed Switches are failsafe; any malfunction during operation will de-energize the control circuit. The LRB1000 and LRB2000 are completely field adjustable while the machinery is at rest; there is no need to run the shaft. They feature visual setpoint adjustment for dial-in ease and the precise digital circuitry provides high accuracy, repeatability, and reliability. An example of a standard LRB1000/LRB2000 system includes the LRB1000 DIN rail mount module, a 906 Hall Effect Shaft Speed Sensor, and a 255 Pulser Disc. Other shaft speed sensor and pulser target options are available. POSITION 2 SPD ON UNDER OFF OVER ON Standard System with: LRB1000 Speed Switch, 906 Speed Sensor, 255 Pulser Disc 2.28 6111 BLUE CIRCLE DRIVE

Reliable Products Trustworthy People Input Signal Sensor Supply Open Collector/Logic Frequency Input Model Description Part Number Input Power Input Current Shaft Speed Switches LRB1000 /LRB2000 Standard System • Shaft Speed Sensor • Shaft Speed Pulse Generator These are the most popular system components. Many other options are available. System Options Setpoint Data Number of Setpoints Actuation State Setpoint Accuracy 0.005% @ Low Range 0.25% @ Mid Range 0.5% @ Top Range Contact Arrangement LRB1000 - One Form C, SPDT LRB2000 - Two Form C, SPDT Relay Contact Rating Start Delay Part Number 906...