Yaskawa LEGEND-MC - Manual (Page 25)

15
LEGEND-MC User’s 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 compli-
mentary input, i.e.; use two 10k resistors, one connected to +12V and the other connected to the LEGEND signal
ground to hold the /A phase and /B phase at 6VDC. Do not use a 24VDC encoder.
Item Specifications
Input Format Quadrature
Pulse and Direction
Maximum Frequency 12 MHz
Current Draw 940
µAmp
10
11
34
8
9
Legend-MC I/O
Connector CN5
34
Internal Circuitry
A+phase
A-phase
B-phase
B+phase
External Encoder
+5V or +12V
0V
Shield
Frame
Ground
Digital
Ground
Digital
Ground
2.4
k
2.
4k
4.
7k
6.8k 4.7k 6.8k
VCC
3486
3486
Field Wiring