R
EPLACEMENT KIT INSTRUCTIONS
Tachometer Feedback Board
Replacement
Contents This document shows how to remove and re place a tachometer
feedback board in a 1395 DC drive.
What This Kit Contains Using the table below, verify that you have received the appropriate
items in your kit:
For this part: You should receive this quantity:
tachometer feedback board 1
electrostatic discharge (ESD) strap 1
Other Items Needed Before you begin, be sure you also have the following:
• T ools you will need to:
• Documentation:
As applicable
• Loosen and tighten screws (slotted screwdriver)
• Test for voltage (multimeter)
• Your drive syste m schematics
• Publication 1395-5.40, Bulletin 1395 Digital DC Drive–
User Manual
• Publication 2 361-5.01 , Bullet in 1395 Digital DC Drive in
Bulletin 2361 Motor Control Center for Drive Systems–
User Manual
• Publication 1395-5.12, 1395 Discrete Adapter Board–
Installation and Opera tion Manual
• Publication 1395-5.55, Bulletin 1395 Digital Reference
Adapter Board–Hardware /Software Referenc e Manual
2 Tachometer Feedback Board Replacement
Safety Precautions The following general preca utions apply when working on drives:
AT TENTION: Only those familiar with the drive
system, the products used in the system, and the
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associated machinery should plan or implement the
installation, startup, and future maintenance of the
system. Failure to comply can r esult in persona l injury
and/or equipment damage.
AT TENTION: Verify that all sourc es of AC and DC
power are deenergized and locked out or tagged out in
accordance with the requirements of ANSI/ NFP A 70E,
Part II.
AT TENTION: The system may contain stored ener gy
devices. T o avoid the hazard of electric al shock, verif y
that all voltage on capac itors has been discharged before
attempting to service, repair , or remove a drive system
or its components. You should only attempt the
procedures in this manual if you are qualified to do so
and are familiar with solid-state control eq uipment and
the safety pr ocedures in publication NFPA 70E.
AT TENTION: When servicing any unit, do not drop
any nuts, bolts, washe rs, etc. inside the unit, as they may
cause a short circuit on power up.
AT TENTION: This drive system contains ESD
(Electrostatic Discharge) sensitive parts and
assemblies. Static contr ol precautions are requir ed
when installing, testing, or repairing this assembly.
Component damage can result if ESD control
procedures are not followed. If you are not familiar with
static control procedures, refer to Rockwell Automation
publication 8000-4. 5.2, Guardi ng Against Electr ostatic
Damage or any other applicable ESD protection
handbook.
Special Instructions Importa nt: You will need to reuse parts that are removed from the
drive. Place parts, in the order removed, on a clean
surface.
Importa nt: Some washers, such as clamp and Belleville washers,
have only one correct orientation.
Tachometer Feedback Board Replace ment 3
Preliminary Steps Before replac ing the tachometer fee dback board, shut off the
drive power, wait five minutes for the voltage to discharge, open
the drive door; and remove any Lexan™ shielding as necessary.
Removing the Tachometer
Feedback Board
Installing The Tachometer
Feedback Board
1. Using a voltme ter, test the voltage across the three phases,
then across the board terminals.
AT TENTION: If there is any voltage present,
remove the source of the voltage and check for
!
voltages again before procee ding to the next step.
2. Observe the wiring and tag wires as necessary.
3. Disconnect the tachometer leads (terminals 1, 2, and 3).
4. Disconnect the adapter board le ads (terminals 5 and 6).
5. Disconnect the wire to TE (terminal 4).
6. Snap the boar d out.
Information for grounding, wiring, and scaling a tachometer is
given in the installati on section of publication 1395-5.4 0, Bulletin
1395 Digital DC Drive–User Manual.
Tachometer Feedback Board
Adapter Board
Tach Velocity (+)
Tach Velocity (-)
+ -
1
2
3
5
6
4
TE
DC Tachometer
Kit Catalog
Number
2361-SPP01A 0-33V 14TFB 14T033 Terminal 5 (+) TB3-24 (+) TB3-33 (+)
2361-SPP02A 34-46V 14TFB 14T046 Termi na l 6 (-) TB3-23 (-) TB3-34 (-)
2361-SPP03A 47-70V 14TFB 14T070
2361-SPP04A 71-125V 14TFB 14T125
2361-SPP05A 126-178V 14TFB 14T178
2361-SPP06A 179-250V 14TFB 14T250
Input Voltage
(From Tachometer)
Old 2361
Option Code
New 2361
Option Code
Tachometer
Feedback Board
Discrete
Adapter Board
Digital Refere nce
Adapter Board
1. Put on the ESD strap which is included in the kit to protect circuit
boards from electrosta tic discharges.
2. Verify that the board is properly size d for the tachometer rating.
AT TENTION: The digital reference adapter board
can be severely damaged by input voltages gr eater than
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3. Secure the board to the drive.
4. Connect the tachometer leads to terminals 1 (+) and 2 (-) on the board,
and connect the tachometer common lead to terminal 3 on the board.
5. For connection to a discrete adapte r board, wire terminal 5 (+) to
TB3-24 (+), an d wire terminal 6 (-) to TB3 -23 (-).
For connection to a digital ref ere nce adapter board, wire
terminal 5 (+) to TB3- 33 (+ ), and w ire ter mi nal 6 (-) to
TB3-34 (-).
6. Wire terminal 4 to TE.
±10 V.
Concluding Steps After instal ling the board, replace any Lexan shielding and secure the door.
Dispose of the old parts according to your compa ny procedures and local
codes.
Lexan is a trademark of Genera l Electric Corp.
Publication 2361- 5.27 - September 1998 P/N 192122
1998 Rockwell International. All Rights Reserved. Printed in USA
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