TACHTROL 2 Low-cost Digital Speed/ Rate Monitor

1 TACHTROL 2 Low-cost Digital Speed/ Rate MonitorPart Number Series T77220 Easy set-up using DIP switches. High precision: .05% of displayedvalue. Rugged: Designed to meet MIL-810C shock and vibration. Operating temperature range0-50 speed of: Compressors Conveyors Printing presses Paper machines Electric motors Pipeline pumps Marine engines and shafts Rolling mill drives Packaging lines Flow transducers Variable speed drivesFeatures & Advantages Single-channel precision speed orrate monitoring. Period mode measuring system. Field adjustable normalization. Five-digit auto-ranging .56" ; full or partial auto-rangingwith leading zero suppression. Updates twice per second. Wide frequency range: 1 Hz to 30 KHz, switch selectable to lowrange, Hz to 1 KHz.

2 Active or passive sensor input:Accepts any pulse output device,magnetic sensor or Digital sensor. Panel mount DIN standardhousing. Indicates reverse direction ofrotation by minus sign on display. Fast response. High precision. Low Airpax TACHTROL 2 Speed/ rate Monitor is a single input digitalinstrument designed to offer fast-response, high-precision monitoringof speeds or rates . It displaysmeasured values in engineering units:RPM, FPM, frequency or period mode measurement,using an on-board microcomputer,produces response and precision notattainable using conventional indus-trial speed instruments, at a price thatis considerably lower than compar-able products on the market simple method for setting aninput conversion factor makes itexceptionally easy to adjust theinstrument to display engineeringunits from most frequency-producingsensors.

3 You just enter the scalingfactor and type of sensor, and Tach-trol is ready to is the customer's responsibility todetermine whether the product isproper for customer's use andapplication.} See page 21 for dimensions*See page 19 for dimensions**See page 20 for dimensions Net WeightOrdering P/NInput PowerEnclosure(lbs.) T77220 -01120 Vac/12 VdcLess Vac/12 VdcLess Vac/12 VdcStd. Panel Vac/12 VdcStd. Panel Vac/12 VdcNEMA 4X * Vac/12 VdcNEMA 4X * Vac/12 VdcExplosion Proof ** Vac/12 VdcExplosion Proof ** ExplosionProofor NEMA 4 XDisplay OutputAccuracy: .03% typ., .05% maximum(% of reading).Resolution: Five (5) digit resolution fordisplay values from to (4) digit resolution for displayvalues< When fixed decimal isused, fixed position will.

4 56" red, seven (7) segment LEDdisplay with red filtered Time:For f in >2Hz Display Response = .5 sec.+1/f in .1 Hz-2 Hz Display Response = 1/f Range: Input frequenciesmay be scaled for display by aninternally adjustble constant (C). Thedisplay indication is C x input may be set from x 10-7 to 10+ Supply120 Vac 10%, 50-60 Vdc, +3V, - watts :Panel mount 1/2 DIN case enclosures designed to meetNEMA 4, and NEMA 4X. Hazardouslocation enclosure meets NFPA/NEC,Class I, Groups B, C, D; Class II, GroupsE, F & G, UL standard 886 and CSAstandard No. 30 :Designed to meet MIL-810C, , procedure VII, fig. , curveV ( g s 10-200 Hz).Shock:Designed to meet MIL-810C, , procedure 1, fig. forground equipment (30 g s half-sine).Temperature:0 to 50 C operating-40 to 80 C storageHumidity:90% relative humidity and References:Circuit common is isolated from ACpower, AC ground and case.

5 DC poweris referenced to circuit common. Passive(AC) signal inputs are balanced. Activesensors require terminal two (2) connec-tion to terminal five (5). This referencesthe active sensor to circuit InputType:Switch selectable for AC balanceddifferential input (passive sensors) or TTLcompatible pulse input. Direction signalinput is TTL compatible for use with bi-directional pickups. A TTL logic (on thedirection terminal 3) produces a negativespeed Input (sine wave)Input Impedance= 2K ohmsSensitivity @ 1 KHz =200 mVrmsMax. Voltage Input = 25 VrmsCMRR=>40 db @ 1 KHzref. to input amplifier Input (TTL compatible)Input Impedance= 2K ohmsMin. pulse width= 10 s (30 KHz rng.)= 200 s (1 KHz rng.)Logic 0= V in <.5 VLogic 1= V in > (+12 VDC @ 50 mA supplied for poweredsensors)Frequency Response:Switch selectable in two (2) Hz - 30 KHz or.

6 1 Hz to 1 in inches and (mm).Electrical ConnectionsPanel Mounting Dimensions