Rockwell Automation 57C329 Remote I/O Communications, AutoMax - Manual (Page 18)

2Ć4
2.1.3 Remote I/O Head (M/N 57C328)
The Remote I/O Head can be used as an interface between the
AutoMax Remote I/O network and the AutoMate rail I/O system,
which consists of Local Heads, digital or analog rails, LED modules,
or Thumbwheel Switch Modules. Note that although the Remote I/O
Head can be used as an interface to drives with railĆtype interface
ports (such as the Reliance GPĆ2000/VTAC V controller), it is
recommended that only the Remote Drive Interface Head
(M/N 57C329) be used for interfacing with drives over an AutoMax
Remote I/O network. See section 2.1.5 for more information.
The M/N 57C328 Remote I/ O Head is identical to the M/N 57C330
Remote I/O Head, except that you can mix input and outputs in the
same rail. Each port on the Remote I/O head contains separate
address spaces for inputs and outputs. Like the M/N 57C330 Remote
I/O Head, it can control up to 4 digital rails, analog I/O rails, or Local
Heads. Each Local Head can in turn control up to 4 AutoMate digital
rails. Therefore, a Remote I/O Head with 4 Local Heads connected to
it can control a maximum 16 digital rails.
The AutoMax Remote I/O Head consists of a power supply, two
printed circuit boards (a processor board and a remote I/O
communications board), a faceplate, and a protective metal
enclosure. See figure 2.3 for an illustration of the both Remote I/O
Heads.
The 25Ćpin DĆshell connector on the faceplate supports the
RSĆ232Ćcompatible serial port described in section 5.0. The BNC
connector on the faceplate is used to connect the Remote I/O Head
to the Remote I/O network. The four I/O connectors are used for Rail
and/or Local Head communications.
The thumbwheel switch on the faceplate is used to set the Remote
I/O network drop number. Drop numbers 1 through 7 inclusive
indicate valid Remote I/O drop numbers.
The terminal strip on the faceplate provides connections for incoming
power as well as a set of normally open contacts from the Ready
Relay. The contacts are closed when the Remote I/O Head is
operating properly and open if a problem is detected in the onĆboard
microprocessor. These contacts can be used to take remedial action
in the event of a problem with the onĆboard microprocessor.
For diagnostic purposes, the faceplate contains a sevenĆsegment
LED that displays error codes (see Appendix D). The faceplate also
contains six status LEDs, which are labeled as follows:
RUN (amber): Normally on; if off, indicates that the CPU watchdog
has timed out.
POWER (green): When on, indicates power is being supplied to the
CPU and internal voltages are within range.
CPU READY (amber): Will turn on after the powerĆup diagnostics
have been completed successfully and the CPU watchdog has not
timed out. Also indicates the state of the Ready Relay contacts. When
on, the Ready Relay contacts are closed.
FAULT MSB/FAULT LSB (amber): Normally off. When on, these LEDs
indicate the particular rail that has experienced a fault. These LEDs
are valid while the Rail Fault LED is lit. See section 6.8 for more
information.
RAIL FAULT (red): When on, indicates that a rail fault has occurred.