GE GFK0579B User Manual

The Remote I/O Scanner has three LEDs that show through the transparent portion at
the top of the door.

lights to indicate that the module has passed its powerup diagnostic
tests.  If this LED flashes, it indicates a problem, as shown in the table
below.  If this LED is off, there is a fatal error, which causes the Remote
I/O Scanner to go to stop/faulted  mode.

lights when the Remote I/O Scanner is receiving the expected output
data from the CPU.  If this LED flashes, it indicates either I/O data is
forced, or a Device Number conflict.

if the Remote I/O Scanner is installed on a dual (redundant) bus, this
LED lights if Bus B of the dual bus pair is the currently–active  bus.

The following table summarizes the LED indications.

On

On

Normal operation

Blinking

On

Fault detected

On

Blinking

I/O data forced

Alternate blinking

Alternate blinking

Fault detected, and I/O data forced

Synchronous blinking

Synchronous blinking

Device Number conflict

On

Off

Outputs not being updated from CPU

Off

Off

No power or fatal error

The front of the module has three connectors:

H 9–pin male D Connector: the upper connector.  Used for attaching a Genius

Hand–held Monitor.

H 15–pin female D Connector: the center connector.  This connector is an RS–422

compatible RS–485 serial port.  It can be used for communicating with a
programmer equipped with the serial version of Logicmaster 90–70, or for
connection to a multidrop communications network.

H The connector at the bottom of the module attaches the  Genius bus terminal strip.

Because the terminal strip is removable, it is possible to service or replace the
Remote I/O Scanner while the rest of the system is operating, without disrupting
bus communications.