Yaskawa SMC–4000 - Manual (Page 21)

11
SMC–4000 User Manual
External Encoder Specifications
Standard voltage levels are TTL (0V to 5V), however, voltage levels up to 12V are acceptable. If using
differential 12V signals, no modification is required. Single ended 12V signals require a bias voltage
applied to the complimentary input, i.e.; use two 10k resistors, one connected to +12V and the other
connected to the encoder signal ground to hold the /A phase and /B phase at 6VDC. Do not use a 24VDC
encoder.
Item Specifications
Number of External Encoders One per Main Axis
Input Format Quadrature or
Pulse and Direction
Maximum Frequency 12 MHz
Current Draw 940 µAmp
Internal Circuitry
VCC
3486
3486
4.7k 6.
8k
4.7k 6.
8k
2.4k 2.
4k
Shield
12
37
23
11
Frame Ground
A+ phase
A- phase
B+ phase
B- phase
External Encoder
+5V or +12V
Field Wiring
X axis internal encoder shown
See 5CN connector for other axis pin connections.
SMC–4000 5CN Connector