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Balmac Vibration Transmitter / Switch 550

Balmac Vibration Transmitter / Switch


The Model 550 Vibration Transmitter/Switch provides low cost, reliable vibration detection and protection for rotating machinery operating within the range of 120- 60,000 rpm. Indispensable to building automation systems, BAS, and HVAC or industrial applications, each vibration switch has a vibration sensor, mounted perpendicular to the unit's base. The sensor responds to the velocity (in/sec) signal and effects automatic shutdown or alarm when the vibration exceeds preset limits. The vibration transmitter unit may be mounted with the sensitive axis in any plane (horizontal, vertical, or axial), even in an inverted position. Two limit set points are provided. One is set for the maximum allowable vibration (in/sec), while the other is set for a percentage of that setting, which trips the alarm relay when that percentage is reached. A built-in, adjustable time delay prevents triggering due to transient vibrations. The switch can be wired for automatic reset when vibration falls below setpoint, or it can be wired for latch and remote reset. The unit has a 4-20 mA output that may be used with a panel meter or data logger, permitting analysis of vibration trends. Once the switch has been installed and the limits set, it requires no attention. The Model 550 is enclosed in heavy, water-tight cast-aluminum housing. Explosion proof housings are available.


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QtyModelDescriptionIn StockList PriceInternet Price
550 VIBRATION XMITTER/SWITCH In Stock1,934.001,547.20


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  • Reliable performance
  • Dual SPDT relay and 4-20 mA output
  • Easy to install
  • Two year warranty
  • NIST certificate

Supply Voltage:115 VAC


Frequency:50/60 Hz

Signal Output:4-20 mA @ 500Ω

Vibration Sensitive Axis:Perpendicular to the base, omnidirectional mounting

Measurement Range:0.1-2.75 in/sec (2.5-70 mm/sec)

Frequency Range:2-1000 Hz (120-60,000 rpm)

Relay Output:SPDT relay 5A @ 125 VAC; 5A @ 28 VDC

Time Delay:1-30 seconds

Limits:Limit #1 (alarm) Set as a percent of Limit #2 (shutdown)

Limit #2: (shutdown) Set at a velocity level in inches/sec:

Remote Reset:Circuit closure between latch and common will reset both outputs

Mounting:1/4" hardware, 3 mounting holes

Wiring Terminations:Terminals accepts up to 12 AWG wire

Operating Temperature:-30° to 165°F (-34° to 74°C)

Enclosure Rating:

550:Rugged, water- and dust-tight cast aluminum NEMA 3, 4, and 12

550-x:NEMA 7CD, 9EFG


550:3 .44"W x 5.937"H x 3.88"D (8.73 x 15.09 x 9.84 cm)

550-X:5.3"W x 7.4"H x 4.8"D (12.2 x 18.1 x 11.4 cm)


550:3.6 lb (1.6 Kg)

550-X:6 lb (2.7 Kg)

Warranty:1 year


Download Additional Data

document   550 Catalog Page
document   550 Instruction Manual