Hydrological Services Pty Ltd
3. Installation
The BlueComms has a single DB9 male connector, which has been configured for direct
connection to the HS MiniLog ML1. Note that the BlueComms battery is not connected until
it is plugged into the MiniLog – at which time pins 7 is looped to pin 8. This then powers the
BlueComms unit and in turn provides 5.5V on pin 4 to power the MiniLog during the
communication session. When the BlueComms unit is unplugged from the MiniLog, the
battery is disconnected and no power is consumed.
3.1
Hardware Connections
The DB9 male connector on the BC1 is as follows :-
Pin No.
BlueComms BC1 Signal Name
(DB9 Male)
Signal
Direction
ML1 Signal
DB9 Female
1 N.C.
O.C.
Output
2
Rx (RS232 Serial data input)
Tx
3
Tx (RS232 Serial data output)
Rx
4
Pwr to MiniLog (5.5V DC)
ExtPwr
5 Gnd
Gnd
6 N.C.
Ext
Pwr
7
Battery Out (2 x AA = 3V DC)
Ext Pwr
8
Battery In (3V DC)
Ext Pwr
9
N.C.
Bucket Tip I/P
Notes:
1. When the BC1 is directly connected to a MiniLog the following handshake signals are
linked :
•
Pins 4 and 6 are linked together inside the ML1.
•
Pins 7 and 8 are linked together inside the ML1.
2. When the BC1 is directly connected to an ML1, sufficient power is extracted on pin 4 to
power the ML1 – which prevents power drain from the internal ML1 lithium battery
while communications is in progress.
BlueComms Model BC1
©
Copyright
BC1 100-5
Issue 1.00 5 June, 2006
