GMC-SG001E-EN-P-JUN01 Motion Control Selection Guide

4-28 1394 Drive System Family
System Module Encoder Input Specifications (1394x-SJTxx-C-xx, -L-xx, and -T-xx)
Specification
Number of encoder inputs
Type of encoder input
Encoder interface IC
Compatible encoder types
Decode modes
Maximum encoder frequency
Input impedance
Encoder power
Description
• 4 (axis 0, 1, 2, and 3) for 1394x-SJTxx-C-xx and -T-xx systems
• 2 (axis 0 and 1) for 1394C-SJTxx-L-xx systems
Incremental AB quadrature; optically isolated, differential with marker channel
AM26LS32 or equivalent
Differential, TTL-level (5V DC) line driver outputs, with or without marker
4 times quadrature, step/direction, count up/count down
4,000,000 counts per second (4 MHz). This is equivalent to a channel frequency of 1
MHz in 4x quadrature decode mode.
7 kohms minimum (each input)
5V DC @ 1A, user supplied
Serial I/O Specifications (1394x-SJTxx-C-xx, -L-xx, and -T-xx)
Specification
Description
Number of serial channels 2 (serial port A and serial port B)
Channel type
Optically isolated RS-232 or RS-422; each channel individually configured via internal switch
Information code
ASCII
Baud rate
User-selectable up to 128 kbaud (rs-422); 115.2 kbaud (RS-232)
Number of start bits
One
Number of stop bits
One
Word length
8 bits (7 data bits plus 1 parity bit)
Parity
Space parity transmitted; receive parity ignored (may be mark, space, even, or odd)
Duplex
Full or half (user-selectable)
Data synchronization
XON (control-q)/XOFF (control-s)
Front panel connectors IBM-PC/AT compatible 9-pin D-type female
RS-422 termination
User-selectable 220 ohm resistor via internal switch
Publication GMC-SG001E-EN-P — June 2001