8
Manual maxGUARD
2526740000/02/03.2018
3 System overview
| Functions
Internal signal line
The individual modules communicate via a shared signal
line. The signals are processed according to priority (1= high,
5= low).
Signal
Priority
Encoder
Reset
1
AMG FIM-C, AMG CM
ON/OFF
2
AMG CM
Alarm
3
AMG ELM
Overload advance warning (I>90%)
4
AMG ELM
IDLE
5
AMG FIM-C, AMG CM
3.2 Functions
Overload advance warning
The adjustable load monitors are equipped with an overload
advance warning function.
If the output current of an adjustable load monitor exceeds
90% of the designated tripping current, this load monitor
couples an overload advance warning into the internal signal
line. The load monitor LED will flash green.
The overload advance warning can be transmitted to a con-
trol board via control modules or potential-free via alarm
modules.
Low voltage detection
Active feed-in modules, control and alarm modules as well
as all load monitors are equipped with low voltage detection.
If the input voltage of a load monitor falls below 18 V, the
module LED will quickly flash red.
If the input voltage of a load monitor falls below 18 V, the
load monitor will also disconnect the output.
If the input voltage falls below 15 V, the module will power
down completely. The module LED will be off.
After power is restored, the module will automatically switch
to its last operational state prior to the undervoltage.
Surge detection
Active feed-in modules, control and alarm modules as well
as all load monitors are equipped with surge detection.
If the input voltage of these modules exceeds 31.2 V, the
module LED will quickly flash red.
Overtemperature detection
The adjustable load monitors and the 4-channel load moni-
tors are equipped with overtemperature detection.
If an overtemperature is detected on a channel, the load
monitor will disconnect the output and couple an alarm
signal into the internal signal line. The load monitor LED will
illuminate orange (red and green simultaneously).
3.3 Type plate
Each module features a type plate, which includes identifica
-
tion information, the key technical specifications and a block
diagram.
2
1
4
6
5
3
Type plate (example)
1
Product identification
2
Block diagram
3
Certification
4
Manufacturer
5
Serial number
6
Technical data
