Rockwell Automation 7000L PowerFlex Medium Voltage AC Drive (C Frame) - Classic Control - Manual (Page 541)

Catalog Number Explanation – Drive Selection A-5
7000 “C” Frame 7000L-UM300I-EN-P – June 2013
Tachometer Specifications
Avtron : 685 Magneto Resistive
ELECTRICAL
Input Operating Power
Volts (V+) 11.5 VDC to 15.5 VDC
Current
120 mA no load, per output. As loads are added, required current increases.
See following examples for added loads.
Cable impedance
switching examples
 320 mA @ 0.05 µF, 15 VDC, 72 kHz differential
 15 mA @ 0.05 µF, 12 VDC, 12 kHz, Single ended
Output Example
 28 mA for Quadrature output into
1 KΩ, 15 VDC
Alarm Example  +V (OUT) for Alarm 50 mA max.
Electrical Outputs
Outputs
Square wave from 4428 differential line driver with transient protection
Volts, High
 (+V) – 1.8 min. (0.05 µF, 15 VDC, 72 kHz,
differential, +V (OUT) @ 50 mA
 (+V) – 0.6 max. (0.0 µF, no load)
Note: Does not include cable IR drop.
Volts, Low 0.12 typical, 0.5 max.
Current 1.5 amps peak, 30 mA average typical
Incremental Channel
Quadrature square wave, phase A leads phase B for
CW rotation as viewed from anti-drive end of the motor
(tach mounting end)
 Duty Cycle 50% ±5% (average)
 Transition Separation 25% ±5% (average)
 Resolution
Up to 1200 PPR (see resolution table in the description
section)
Marker Channel
Once per revolution. Pulse width approximately 1/3 of
base PPR period
Alarm Output Refer to Engineering Note 30.
 +V (OUT)
This is a convenience output, internally jumpered to +V
operating voltage. It is intended for alarm circuits like
solid state relays that can be referenced to +V.
 Alarm
Open collector, sink 100 mA max., withstand 50V max.
referenced to common. Output goes low on alarm.
MECHANICAL
Speed Range
0-4500 RPM for base PPR of 480
0-4200 RPM for base PPR of 512
0-3600 RPM for base PPR of 600
Weight 6.4 kg (14 lbs)
ENVIRONMENTAL
Operating Temperature -20°C to 71°C
Dust and Water
A standard M685 pulse generator is shipped with a universal breather/drain to
equalize pressure if the M685 is exposed to temperature cycles and provide a drain
for condensate. The labyrinth design limits the entry of dust to normally satisfactory
levels, and water spray in any direction has no harmful effect. In environments with
stable temperatures, the breather may be replaced with a ¼” pipe plug – making the
pulse generator water-tight and dust-tight.
Features and Specifications subject to changes without notice.