didn’t
3.6.9
P
Th
commu
Th
DS
turn it on.
Power&Si
here with
unication.
he M14 In
SG-121
ignal
Inter
a M14 Int
nterface de
-VT
rface
terface co
efined as b
14
/
1
ontain DC
below:
1 –
2 –
3 –
4 –
5 –
for
6 –
7 –C
(hig
8 –
19
Power IN
GND (RS232
VBat Power
N/A
TXD (RS232
12 V DC (us
current touch
RXD (RS2
Charging con
gh impedance
PGND (Batte
N, Charger
2)
(12-75V DC)
2)
ed to control
h)
232)
ntrol (OpenDr
e) – no chargi
ery GND)
control an
)
charging tog
rain to GND)
ing.
nd RS232
gether with Pi
. When close
in 7
ed
