Glentek SMB9675-1A-1-7700, Installation & Operation Manual

Page: 20 / 33

Appendix B www.glentek.com
20 MANUAL # 9675-1035-000-A
B-5 Encoder Feedback
The following pin description defines the main encoder feedback input port.
Signal Description
---------- ----------------------------------
+5V Drive supplied 5 volt source (output)
A+ / A - Encoder A channel input
B + / B - Encoder B channel input
Z + / Z - Encoder Z channel input (not used)
The spindle drive can supply 5 volts of encoder power. The source is rated at 150 mA.
The encoder input uses a DS26LV32 differential line receiver. By default, the encoder feedback is
configured for receiving differential signals (single-ended configuration is available upon request). The
spindle drive accepts nominal encoder frequency of 5 MHz (maximum frequency of up to 10 MHz is
possible, but is system dependent). The Z channel is edge sensitive such that swapping Z + and Z - does
not change the behavior of the spindle drive.
B-6 Encoder Output
The encoder out signals are differential output signals. The encoder output pins are buffered
representation of the motor encoder feedback. The encoder output uses a 26C31 differential line driver.
Encoder channels A and B are available as pins AOut +, AOut -, BOut +, BOut - on P5.
B-7 Load Meter Output
This is an indication of the load on the motor. The output ranges from -10 volts to +10 volts and has
16-bit resolution.
2.5 VDC = 100% absolute motor current (100% of continuous current)
3.75 VDC = 150% absolute motor current (150% of continuous current)
TP1 (AN0)
3.01K
+3Vref
FROM DSP (SCLK)
Vref
20.0K 3.01K
220pF
AGND
TP7 (AGND)
FROM DSP (D/A_0)
AGND
LOAD METER + (RED)
0.0022uF
AGND
3.01K
Vref
0.1uF
0.0022uF
3.01K 20.0K
150
220pF
FROM DSP (SI)
0.1uF
-
+
TLE084
3
2
1
150
AUX. ANALOG OUT
AGND
DAC8532
1
2
3
4
5
6
7
8
Vdd
VREF
VFB
Vo SY NC
SCLK
DIN
GND
20.0K
AGND
TP2 (AN1)
20.0K
+3.3VA
LOAD METER - (BLACK)
+
-
TLE084
5
6
7
1uF
Load Meter Output Schematic