Glentek SMB9675-1A-1, Installation & Operation Manual

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Encoder Feedback
The following pin description defines the main encoder feedback input port.
Signal Description
+5V Amplifier supplied 5 volt source (output)
ENCODER A Encoder A channel input
ENCODER B Encoder B channel input
ENCODER Z Encoder Z channel input (not used)
The amplifier can supply 5 volts of encoder power. The source is rated at 150 mA.
The encoder input uses a DS26LV32 differential line receivers. By default, the encoder feedback is
configured for receiving differential signals (single-ended configuration is available upon request). The
amplifier accepts nominal encoder frequency of 5 MHz (maximum frequency of up to 10 MHz is possi-
ble, but is system dependent). The Z channel is edge sensitive such that swapping Z and Z* does not
change the behavior of the amplifier.
Encoder Output
The encoder out signals are differential output signals. The encoder output pins are buffered represen-
tation of the motor encoder feedback. The encoder output uses a 26C31 differential line driver.
Encoder channels A, and B are available as pins EOA+, EOA-, EOB+, EOB- of P2.
Load Meter Output
This is an indication of the load on the motor. The output ranges from -10 volts to +10 volts and has
12-bit resolution.
2.5 VDC = 100% absolute motor current (100% of continuous current)
3.75 VDC = 150% absolute motor current (150% of continuous current)
Load Meter Output Schematic
3.01K 20.0K
LOAD METER
AGND
0.0022uF
20.0K 3.01K
-
+
TLE084
3
2
1
FROM D/A CONVERTER
150
Vref
220pF