Design
ASD 531, Technical description, T 140 416 en
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3.2
Electrical
The electrical design of the ASD 531 includes the following (may vary depending on the device version):
•
AMB 31 Main Board
•
Smoke sensor (SSD 31)
•
Fan
•
Air flow sensor
•
Additional modules XLM 35, RIM 36.
The following circuit components and elements are on the AMB 31 Main Board:
•
Power supply unit with switching controller
•
Fan control with airflow evaluation and temperature measurement
•
Smoke sensor evaluation
•
Opto-isolator input for external reset
•
Driver components for actuating the relays and open collector outputs
•
Microcontroller with ports, RAM, Flash PROM, EEPROM, etc.
•
Lithium battery
•
RTC clock
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3 rotary switches, 2 DIP switches and 3 LED displays for configuration setting
•
10 LEDs for airflow display
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4 LEDs for displaying operation, alarm, fault, dust and dirt
•
2 relays with potential-free change-over contacts for fault, alarm
•
Terminal blocks with pluggable screw terminals for the device connection
•
LED for hardware watchdog
•
SD memory card holder
•
2 LEDs for SD memory card signals
•
1 x 16-pin ribbon cable connector (
Option1
) for connecting to the XLM 35
•
1 x 8-pin ribbon cable connector (
Option3
) for connecting to the RIM 36
•
One 6-pin ribbon cable connector for connecting to the smoke sensor
•
One 4-pin plug for connecting to the air flow sensor
•
HW reset button.