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10
en | Introduction
3.2
Product overview
3.2.1
Mainboard
6
Figure 3.3: Upper circuit board with display (front)
2021-04 | V04 | IM
1
2
3
7
8
9
1
DIP switch for RS-485 address and protocol selection.
2
Lithium battery for buffering of static RAM and real time clock (RTC). The battery life
is estimated at 10 years, nevertheless an error message is generated if the voltage
sinks below a preset minimum level.
NOTICE: In order to avoid an error message caused by an earlier voltage drop we
suggest to replace the battery every 8 years. Spare part: VARTA CR 2032 PCB.
3
Reset push button - reachable through the casing using a screwdriver
4
Liquid Crystal Display
5
Push button, available on top of the housing, to select different display modes
6
Jumper: Equalization of potential between different systems and earth ground
(shield)
7
Jumper: Interface selector RS-485 host connection, RS-485 two wire or RS-485 four
wire (depends on external wiring)
8
Configurable RS-485 host interface
9
Compact flash memory
10
Project-specific interface
11
Configurable 10/100 Mbit/s Ethernet host interface
4
5
10
Installation manual
Access Modular Controller 2
11
Bosch Security Systems B.V.
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