background image

SV850 SAFETach™ III Incremental Encoder

SV850

1

www.avtronencoders.com

Nidec Industrial Solutions

 

243 Tuxedo Avenue  |  Cleveland, Ohio 44131 

 

encoderhelpdesk@nidec-industrial.com

+1 216-642-1230

Incremental Encoder

ENCODER INSTRUCTIONS

Rev: 001

ROTOR INSTALLATION

Use the dial indicator gauge to ensure motor shaft runout (TIR) does not 

exceed (0.004”) [0.10mm]. Apply anti-seize compound to the shaft.

 CAUTION

 

Do not strike the encoder or rotor at any time. Damage    

 

will result and the warranty will be void. At installation,  

 

clean and remove paint and burrs from motor shaft and  

 

mounting face. Apply anti-seize compound (supplied) to  

 

each EXCEPT CAM SCREW ROTORS.

NOTE

If optional inboard seal plate and/or magnetic shield is 

used, gage the rotor location from the shield/seal plate(s). 

Ensure the rotor label marked “this side out” is facing 

away from the motor.

GENERAL

The Avtron Model SV850 SAFETach™ III is an incremental encoder (also 

known as tachometer or rotary pulse generator), allowing operation 

down to zero RPM. It provides a specific number of electrical Pulses Per 

Revolution (PPR) that are proportional to a shaft’s revolution. The SV850 

SAFETach III is a bearingless, couplingless, modular design, providing 

unequaled reliability and mechanical performance in a functional safety 

enviroment.

The SV850 fits AC and DC motors with an 8.5” C (FC / 180) Face. Both 

end-of-shaft and through shaft mountings are accommodated.

The SV850 Encoder consists of three or four parts: a rotor, a stator 

housing, and one or two removable sensor modules. No gapping, 

adjustment, or shimming is required!

An Avtron SV850 SAFETach III is equipped with one or two SV5 sensor 

modules. Each module has a two-phase output (A, B) 90° out of phase, 

with complements (A, B), (A Quad B Output), and a marker pulse 

with complement (Z, Z). For applications which require more than 2 

independent outputs, SV850 encoders may be stacked via the use of 

shaft adapters (see Table 2 for part numbers). Two separate encoders 

would be purchased.

Output resolution on the SV850 is determined by the sensor only. Unlike 

older models, any PPR’s can be mixed and matched. Selection of the 

rotor is based only on the shaft mounting requirements (and not PPR).

The SV5 removable sensor assembly has a diagnostic package that 

includes Adaptive Electronics and a Fault-Check output. With this 

package, the SAFETach III can maintain itself, and let you know if there is 

a problem before the problem causes unscheduled downtime.

 

SECTION II: INSTALLATION

GENERAL

The motor must comply with NEMA MG1 for dimensions, face runout, and 

shaft runout. Axial float or endplay must be less than +/-0.100” inch.

INSTALLATION HARDWARE

Installation hardware required is attached to each assembly.

Equipment needed for installation

The outer edge of the rotor may be damaged by scratches, severe blows, 

and strong magnetic fields.

Equipment Needed for Installation 

Provided

Optional

Not Provided

SV850 Encoder

-   Washer, Spring Lock  

  1/2 (4)
-  Hex Hd. Cap Screw  

  1/2-13 x 3.00 (4)  

Rotor

-  Rotor Installation  

  Hardware Kit
-  Anti-Seize  

  Compound (copper)  

-  Thread Locker (blue)

-  A35226 Gauge or 

  A25355 M285/ 

  SV850 Rotor  

  Gauge Block
-  Inboard Through- 

  Shaft Seal Plate
-  Outboard Through- 

  Shaft Seal Plate Kit
-  Silicone Lubricant  

  or 20 Weight  

  Machine Oil
-  Dead Blow Hammer
-  Large Frame  

  Adapter Kit  

  (Modification “700”)
  SV850 Shield Kit  

 (A35355)

-  3/4” Wrench
-  Phillips Screwdriver
-  7/16” Nut Driver
-  Dial Indicator
-  Vernier Caliper
-  3/32” Hex Wrench  

  (T-Handle style) (thru  

  shaft rotors only)
-  3/16” Hex Wrench  

  (cam screw rotors only)
-  9/16” Wrench (end-of- 

  shaft rotors only)

Summary of Contents for Avtron SAFETach III SV850

Page 1: ...odule has a two phase output A B 90 out of phase with complements A B A Quad B Output and a marker pulse with complement Z Z For applications which require more than 2 independent outputs SV850 encoders may be stacked via the use of shaft adapters see Table 2 for part numbers Two separate encoders would be purchased Output resolution on the SV850 is determined by the sensor only Unlike older model...

Page 2: ...P Large EPIC with Plug T Terminal box 000 None 004 Super magnetic shielding 007 Mechanically sealed housing super magnetic shielding 076 Outboard seal ing 077 Mechanically sealed housing super magnetic shielding outboard sealing 4xx Special PPR see chart SPECIAL PPR OPTION CODES 4xx Code PPR Left PPR Right 4xx Code PPR Left PPR Right 4xx Code PPR Left PPR Right 4xx Code PPR Left PPR Right 401 1270...

Page 3: ...0 Avtron offers an outboard through shaft seal plate kit with V ring seal See Table 4 for part numbers and Figure 4 1 Install the encoder rotor as shown above 2 Remove the existing cover of the encoder Retain the screws and washers 3 Mount the SV850 stator housing as shown in Figure 4 4 Install new through shaft cover using the 4 10 24 screws and washers from step 2 5 Apply silicone lubricant or m...

Page 4: ... from the motor 2 Remove the SV5 sensor from the housing Clean the housing mounting surface for the SV5 sensor and the SV850 housing Ensure the SV5 sensor is directly mounted on the SV850 housing with no sealant gasketing or other materials and that it is firmly bolted in place If the alarm output and or LED indicate a fault RED on a properly mounted SV5 sensor and the rotor is properly located re...

Page 5: ...ations V Ring seals provided on through shaft covers Operating Temperature 40 to 100 C 0 100 condensing humidity Vibration 18 g s Shock 1 meter drop test LINE DRIVER OPTIONS SPECIFICATIONS Alarm not available on connector option G NorthstarTM compatible pinout Electrical specifications for SAFETach III model rev BA or later consult Nidec Industrial Solutions for earlier model specifications PPR St...

Page 6: ...ION OPTION OPTION OPTION T OPTION B E D A C F J 6 3 2 1 4 5 10 D B A F C NC NC B C E A D NC NC OPTION E F 6 3 2 1 4 NC NC 10 E D A F NC NC NC OPTION G FOR SINGLE ENDED SINGLE PHASE WIRING APPLICATIONS RED ORANGE GREEN BLACK A B C D E COMMON V Encoder Power SIGN Z Optional AL GROUND CABLE BELDEN 8771 OR EQUIVALENT OPTION H J M727A Replacements OPTION 3 WIRING DIAGRAMS TYPICAL WIRE SELECTION CHART f...

Page 7: ...r COMMON 24 VDC RELAY POWER SUPPLY 115 VAC SINK 100 mA MAXIMUM WITHSTAND 50 V MAXIMUM REFERENCED TO COMMON ENCODER FUNCTIONAL DIAGRAM ØB ØA ØA ØB LINE DRIVER Example 2 Alarm Output Using Separate 24 VDC Power Supply and Relay ALARM OUTPUT CONNECTION Avtron SAFETach III encoders provide an alarm signal if maintenance is required under specific circumstances A green LED indicates power on and proper...

Page 8: ...SPACED ON A 7 250 184 150 DIA 4 38 111 25 9 00 228 60 DIA LED Indicator STANDARD 1 2 14 NPT OPTION P G PLUG IN INDUSTRIAL CONNECTOR ALTERNATES SHOWN BELOW OPTION D No Inboard Domed Outboard Cover Plate RIGHT MODULE LEFT MODULE 3 83 97 3 4 66 118 4 04 45 0 68 0 063 5 641 143 3 5 641 143 3 1 011 25 7 MOTOR SIDE OPTION KA K9 CAM SCREW STYLE ROTOR OUTLINE DIMENSIONS AND OPTION DETAILS For additional w...

Reviews: