Xylem CHATTER Hardware Manual - Manual (Page 12)

Serial Data Communication for Modbus ( 5 )
Chatter is equipped with RS-485 serial data communications. See position
“
5 ” in Figure 2.
RS-485 Serial Data Communication for Modbus
Terminal Designation/function
A (RS485) Signal A
B (RS485) Signal B
GND (RS485) Ground
GND Ground
Table 7. RS-485 Serial Data Communication
Other Main Components on the Circuit Board
Battery ( 6 )
The battery is located on top of the Chatter PCB (see Figure 3). Connec-
tion is through a connector placed in the middle of the circuit board (“Bat-
tery”, red and black wires).
Please note that the battery can be replaced without first setting the Chat-
ter unit in ”OFF” position.
See section
6. Gain Access to SIM Card and Battery and section 7.
Internal Installation in the Chatter Unit for gaining access to and chang-
ing the battery.
Jumper ( 7 )
A jumper is placed right below the battery with two positions: ON and
OFF. In ON position the Chatter incl. pressure transmitter is powered (acti-
vated), and in OFF position it is disconnected (switched off).
Booster Capacitor ( 8 )
The booster capacitor delivers current during data transmissions.
SIM Card ( 9 )
The SIM card facilitate communication via the GSM/GPRS network.
See also the procedure for inserting/changing the SIM card in section
7. Internal Installation in the Chatter Unit on page 25 .
Data Logger
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