National Instruments NI 9512 User Manual - page 30
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Chapter 3
Signal Connections
Encoder 0
Encoder 0 Phase A+
Encoder 0 Phase A-
• Primary encoder for position or
velocity feedback
• RS-422 differential, compatible
with single-ended encoders
• 20 × 10
6
counts/second maximum
• 100 ns minimum pulse width
(differential inputs)
• 400 ns minimum pulse width
(single-ended inputs)
• Index input used to establish
reference position
• Digitally filtered
Encoder 0 Phase B+
Encoder 0 Phase B-
Encoder 0 Index+
Encoder 0 Index-
Encoder 1
Encoder 1 Phase A+
Encoder 1 Phase A-
• Secondary encoder for position or
velocity feedback
• RS-422 differential, compatible
with single-ended encoders
• 20 × 10
6
counts per second
maximum
• 100 ns minimum pulse width
(differential inputs)
• 400 ns minimum pulse width
(single-ended inputs)
• Digitally filtered
Encoder 1 Phase B+
Encoder 1 Phase B-
+5 V OUT
+5 V OUT
• +5 V supply output generated from
the V
sup
input
• Available for encoder power
• 150 mA maximum
(NI 9512 and NI 9514)
• 300 mA maximum (NI 9516)
Limits and Home
Forward Limit
• Connect to switches for system
safety
• Configurable for sinking or sourcing
• 0 to 30 V input range
• 100
μ
s minimum pulse width
• Digitally filtered
Reverse Limit
Home
Table 3-1.
NI 951x Signal Reference (Continued)
S
ignal
S
ignal Name
S
ignal Overview