Dedicated Discrete I/O Specifications; Serial I/O Specifications - AB Quality Allen-Bradley 1394 User Manual

A-12 Specifications
Publication 1394-5.0 — May 2000

Dedicated Discrete I/O Specifications

The table below lists the dedicated discrete I/O specifications for the
system module (1394x-SJTxx-C-xx, -L-xx, and -T-xx systems).
The:
Number of dedicated discrete
inputs
Dedicated discrete input
functions
Input type
Operating voltage
Input On current
Input impedance
Input response time

Serial I/O Specifications

The table below lists the dedicated serial I/O specifications for the
system module (1394x-SJTxx-C-xx, -L-xx, and -T-xx systems).
The:
Number of serial channels
Channel type
Information code
Baud rate
Number of start bits
Number of stop bits
Word length
Parity
Duplex
Data synchronization
Front panel connectors
RS-422 termination
Is:
16 (4 each for axis 0, 1, 2, and 3)
Home limit switch, positive overtravel limit switch, negative
overtravel limit switch, position registration, and thermal
fault.
Optically isolated
24V DC, 28V DC maximum or 5V DC nominal; 10V DC
maximum for position registration inputs
12 mA per input (nominal); 2.5 mA for position registration
inputs
2 kohms (resistive) per input; 8.8 kohms (resistive) for 24
V position registration inputs.
5 ms maximum; 1 µs maximum for position registration
inputs
Is:
2 (serial port A and serial port B)
Optically isolated RS-232 or RS-422; each channel
individually configured via internal switch
ASCII
User-selectable up to 128 kbaud (rs-422); 115.2 kbaud
(RS-232)
One
One
8 bits (7 data bits plus 1 parity bit)
Space parity transmitted; receive parity ignored (may be
mark, space, even, or odd)
Full or half (user-selectable)
XON (control-q)/XOFF (control-s)
IBM-PC/AT compatible 9-pin D-type female
User-selectable 220 ohm resistor via internal switch