HS45
7
6) Attach the new connector header to the encoder using the (4) M5
screws. Tighten to 30 in-lbs [3.4n-m]. Be sure the ribbon
connector fits in the open pocket under the header and is not
crushed or pinched by the connector header.
TO CHANGE BORE SIZE INSERT:
1) Remove electrical power.
2) Remove the encoder from any existing mounting.
3) Remove the rear encoder cover (if present) (4 screws are retained)
4) Remove the retaining snap-ring around the insert.
5) Remove the insert from the encoder bore. The insert should slide
out easily.
DO NOT
hammer on the insert to remove it.
6) Slide new insert inside encoder shaft.
7) Reinstall the retaining snap ring over the insert.
8) Reinstall the rear encoder cover as required.
WIRING
CAUTION
Be sure to remove power before wiring the encoder.
Be sure to ground the cable shield: At the drive end. See
note below for Danaher/Northstar wiring.
Refer to the wiring diagrams for specific information on each option.
The AV45 can be wired for single phase or two phase, either with
or without complements, with or without markers. For bidirectional
operation, Phase A channel leads phase B channel for clockwise shaft
rotation as viewed from the anti-drive or accessory end of the motor
(AV45 mounting end).
CAUTION
Be sure to observe maximum current limits for
mechanical overspeed switch option. Exceeding these
limits can cause arcing and cause switch failure; this
may result in property damage, injury or even death.
NOTE
Wiring option “G” provides a pinout compatible with
Northstar
TM
encoders, with a cable shield connection
on pin 10. Note that this option does not ground the
shield; Avtron still recommends grounding the shield at
the drive end of the cable for all wiring options.
CORRECTIVE ACTION FOR PHASE REVERSAL
1) Remove Power.
2) Exchange wires on cable, either at encoder cable end,
or at speed controller end (but not both).
a) Single Ended 2 Phase Wiring (see wiring diagram)
Exchange A and B at the use end of the wires.
b) Differential 2 Phase Wiring (see wiring diagram)
Exchange either A with A– in the phase A pair OR
B with B– in the phase B pair but NOT both.
3) Apply Power.
4) Verify encoder feedback is correct, using hand rotation
of shaft, or jog mode of the speed controller.
Interconnecting cables specified in the wire selection chart are based
on typical applications. Physical properties of cable such as abrasion,
FIGURE 5
VARIATION > ± 15%
PHASE A
PHASE B
temperature, tensile strength, solvents, etc., are dictated by the
specific application. General electrical requirements are: strand ed
copper, 22 through 16 AWG (Industrial EPIC connector type options
can use 14 AWG), each wire pair individually shield ed with braid or foil
with drain wire, .05 uf of maximum total mutual or direct capacitance,
outer sheath insulator. See specifications for maximum cable length.
Strand ed 22 AWG wire should not be used for cable runs great er then
61 meters. If 22 AWG is used with EPIC type connector options the
wire ends should be tinned.
FAULT-CHECK
After power-up and the rotor position is checked by the sensor, the
Fault-Check LED will turn green.
If the adaptive electronics reach their adjustment limit for any reason,
the Fault-Check alarm and LED will notify the drive and operator of
an impending failure. The LED will turn red if the Adaptive Electronics
reach their adjustment limit. This output occurs before an actual
failure, allowing steps to be taken to replace the unit before it causes
unscheduled downtime. Fault-Check annunciation is available as an
“alarm” output through the connector and as an integral LED.
TROUBLESHOOTING
If the drive indicates a loss of encoder/tach fault and the HS45
fault-check LED is not illuminated, check the encoder power supply.
If power is present, check polarity; one indicator of reversed power
supply is that all outputs will be high at the same time. If the drive
indicates encoder fault, but the LED shows GREEN, then check the
wiring between the drive and the encoder. If the wiring appears
correct and in good shape, test the wiring by replacing the HS45. If the
new unit shows GREEN, and the drive still shows encoder loss/tach
fault, then the wiring is faulty and should be repaired or replaced.
If the alarm output and/or LED indicate a fault (RED) on a properly
mounted HS45 and the rotor is properly located, replace the HS45.
An oscilloscope can also be used to verify proper output of the HS45
encoder at the encoder connector itself and at the drive/controller
cabinet. If the outputs show large variations in the signals at steady
speed (jitter or “accordion effect”, see figure 5 above), replace any
magnetized material nearby with non-magnetic material (aluminum,
stainless) (shafts, etc). If variations persist, consider replacing with
super-shielded models, option -004.