Installation manual

Installation 33
Safety Information Product Overview Installation Diagnostics
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Specification
For UL applications, the logic power supply must be a UL recognized or UL listed limited voltage/limited energy or
limited voltage/limited current supply, or a limited voltage supply with overcurrent protection appropriate for the wiring
and not to exceed 12 A. Isolate line connected circuits from low voltage circuits.
For applications to meet the EU Low Voltage Directive, an approved 24V supply must be used and the negative side
must be grounded to PE. PELV circuits must have protective separation for 300 V system voltage from mains
connected circuits, including separation between encoder circuits and motor power wiring. If all circuits connected
to the logic supply are PELV, the wiring need not be isolated from direct contact within a zone of equipotential
bonding, normally an enclosure or set of enclosures bonded together. Otherwise, logic wiring and circuits must be
isolated from direct contact by basic insulation for 300 V system voltage.
In all applications, do not interconnect extra low voltage power supplies so that voltages add.
Motor Feedback Wiring (J6)
Encoder feedback connections are made with the 15-pin high density “D” connector (J6) on the drive. Maximum
feedback cable length is 200 ft [60 m]. Voltage drop in encoder power connections is usually the limiting factor on
encoder cable lengths.
Connection of Encoder Quadrature and Marker Signals
For A, A/, B, B/ and Z, Z/ pairs, Control Techniques cables use low capacitance (~10 pf/ft) wire to get a high
characteristic impedance and low loss. The differential input circuit accepts RS-485 level signals, but if the differential
voltage is less than ±400 mV, an encoder fault is generated.
Connection of Encoder Commutation Signals to the Drive
The drive is capable of receiving U, V, and W commutation signals from either a differential or single ended source.
Figures 36 through 38 show a simplified circuit for the U, U/, V, V/, W, and W/ inputs on the drive. For single-ended
encoder outputs, leave U/, V/, and W/ unconnected at the drive. No PowerTools configuration is required. U, V, and
W have a 1K pull-up to 5V. Logic threshold is about 2.5 V with 0.1 V hysteresis.
Motor Overtemp Wiring
The motor overtemp circuit is compatible with PTC thermistor sensor with 2 k ohm resistance at the over temperature
trip point. The circuit provides 5V open circuit and 0.5 mA closed contacts to an overload switch. For motors without
over temperature protection sensors, pins 14 and 15 of J6 must be shorted together to prevent an overtemp fault in
the drive. Fault turn-on threshold is 0.83V and fault turn-off (reset) threshold is approximately 0.41 V
.