3 - 9
POWER UNITS
Edition 11.2011
3.4
Diagnostics for NG8 / NG16 from index J (continuation)
+15 V LED (green)
The LED displays directly to the presence of the +15 V output voltage. If the voltage drops to
<+13.5V, ±15V converter blocked, the same error code is 4 and the output signal remains at NA H.
-15 V LED (green)
The LED displays directly to the presence of the -15 V output voltage. If the voltage drops to
<-13.5V, ±15V converter blocked, the same error code is 5 and the output signal remains at NA H.
Battery LED (green)
The LED shows a sufficiently high voltage of the backup battery module (083 678), which must be
attached to the left side of the power supply chassis. The battery LED will turn off when the float
voltage is dropped to <2.5 V, the same error code 6 is issued.
The buffer voltage monitor also works in case of failure of the +5 V supply.
In this case, the error code displayed in succession .. 6 + 3.
NA LED (red)
This LED indicates the status of the power failure signal.
LED on = low level, LED off = H level.
The NA signal in the system is directly connected to all output cards and analog outputs. A low
level of NA signal causes immediate shutdown of the outputs. The NA signal is designed as an
open-drain output and can be linked with other modules.
A system generated within the NA-L-level signal can now be recognized by the network device and
turns on the LED-NA.
Error LED (yellow)
LED indicates a fault condition of the power supply.
LED off = normal mode, no error
LED flashing = error condition, number of flash pulses see Error Code
It can also be more error codes are displayed in a row. For example:
Code 3 and Code 6 This error condition occurs when a network device without a backup battery
and is operated without bus termination.
Code 3
Code 6
1 2 3 1 2 3 4 5 6
Summary of Contents for CONTROL SYSTEM 900
Page 13: ...1 12 INTRODUCTION Edition 12 2005 ...
Page 22: ...2 9 CHASSIS Edition 06 2005 2 3 Chassis measurement Chassis side view 4 186 5 247 18 5 284 ...
Page 177: ...8 12 ANALOG INPUT OUTPUT MODULES Edition 06 2005 ...
Page 258: ...10 49 OPERATING PANELS Edition 11 2005 10 8 Teachpanel continued ...