Technical Manual

Technical Manual AM Systems
Connections v4.4 Page 28 of 72
MINI SD CARD
Mini SD card slot. An SD card containing special audio
notification messages can be inserted. F
or future use.
POWER
External power supply input connector.
REL1
The actual relay.
RELAY
The external connection for relay REL1. Normally Open
(NO), Common (COM) and Normally Closed (NC) potential
free contacts are available to connect external devices like
camera’s, buzzers, etc.
Relay max. rating: 30VDC/1A
RESET
Reset button. Pressing this button will result in a software
reset of this board without interrupting the Field Bus.
S1
Rotary switch for selecting one of the following options:
0. Default active
1. Test mode
All other positions of this rotary switch are not used.
SPEAKER
External loudspeaker connection. Allows audio files to be
played (only in combination with the mini SD card).
TAMPER
External tamper connector.
Allows connection of
a mechanical switch to detect
unauthorized opening of the antenna housing.
NOTE
: Not implemented yet in the antenna housing.
TERM
Field Bus termination switch.
The Field Bus needs to be terminated properly to avoid
signal reflections which can cause bad communication. The
first and last device in the Field Bus structure need to
terminate the bus. Switch to ON if this TRX is the first or
last device in the Field Bus.
TUNE BOT1
TUNE BOT2
TUNE BOT3
Pluggable bridge positions to tune the TRX transmitter
bott
om antenna loop signal to maximum value
TUNE TOP1
TUNE TOP2
TUNE TOP3
Pluggable bridge positions to tune the TRX transmitter top
antenna loop signal to maximum value