Rockwell Automation 1394 SERCOS Interface Multi-Axis Motion Control System Installation Manual - Manual (Page 47)

Publication 1394-IN002B-EN-P — February 2004
1394 SERCOS Interface Connector Data 2-15
Understanding I/O
Specifications A description of the 1394 discrete inputs, analog outputs, relay
outputs, SERCOS connections, and logic power connections is
provided on the following pages.
Discrete Input Specifications
Two fast registration inputs and four other inputs are available for the
machine interface on the four discrete input connectors. These are
sinking inputs that require a sourcing device.
IMPORTANT
To improve registration input EMC performance,
refer to the System Design for Control of Electrical
Noise Reference Manual (GMC-RM001x-EN-P).
IMPORTANT
The discrete input 24V dc power supply is
user-supplied.
IMPORTANT
Overtravel limit input devices must be normally
closed and configured in RSLogix 5000.
Discrete Input Pin: Signal: Description:
Capture
Time Edge/Level
Sensitive
Axis 0-3 input pin 1 ENABLE A 24V dc input is applied to these terminals to enable each axis. 50 ms Level
Axis 0-3 input pin 2 HOME
The Home switch input is a normally open or normally closed contact
configured in RSLogix 5000. Inputs for each axis require 24V dc (nominal),
15 mA (max) to energize. Each input is optically isolated and filtered to
minimize switch bounce. Refer to Figure 2.9.
50 ms Level
Axis 0-3 input pin 5
Axis 0-3 input pin 6
POS_OTRAV
NEG_OTRAV
The positive/negative limit switch input is a normally closed contact
configured in RSLogix 5000. Inputs for each axis require 24V dc (nominal),
15 mA (max) to energize. Each input is optically isolated and filtered to
minimize switch bounce. Refer to Figure 2.9.
50 ms Level
Axis 0-3 input pin 7 I/O_Com Common grounding point for input signals (Home, Enable, Pos/Neg_Otrav) N/A N/A
Axis 0-3 input pin 3
Axis 0-3 input pin 4
Axis 0-3 input pin 8 REG_COM
REG_1
REG_2
24V dc high-speed, optically-isolated filtered registration input for each
axis. Refer to Figure 2.10.
500 ns Edge