5
G
CPU Status Indicators
PWR
— When lit, this indicates the unit is powered.
L1
— Lit during power up until the CPU Module initializes.
If
indicator on continuously
after power up, this indicates that the power source is
not
sufficient.
If
indicator flashing continuously
, this indicates one of four possible conditions:
•
no Input Module is connected
•
too many Input Modules are attached for the current Operating Mode
•
Input Modules are set to
different
Operating Modes
•
an Input Module has failed or a communication failure to an Input Module has
occurred
If
indicator flashes once
, this means that the binary input is greater than or equal to 80 or that
count is either < -2,147,483,647 or > +2,147,483,647.
L2
— During power up, L1 and L2 flash together X+1 times, where X = Mode number (Ø - 4).
During normal operation, L2 flashes when the CPU Module is processing an input event.
H
DISPLAY
Unshielded RS485 output
to a
single
ALPHA sign. Used to:
• program messages into a sign
• trigger messages already in a sign
This is not a telephone connector.
I
SERIAL COM
RS232 input
from a PC. Used to program messages and send them to a CPU Module that is
up to
5Ø feet from the PC
.
This is not a telephone connector.
J
Serial Input
Unused.