Garmin SL40 - Rear Connector Pinout

Specifications
Rnan
CoNxBcroR
PrNour
Table 2
Connector
Pinout
Pin
#
UO Connection
Function
Power
*
main DC
oower
input
.,
Reserved
Do not
connect
3
o TxD
RSlSl
serial
duta otrtput
A
'fxKel
transrnit enable
key,
pulled
low
to transrnil
5
NC
Do nol connect
6
O
Sncakc'r soeakcr terrninal trtitoul
1
Mie
sround rnicronhtlnc innut ururrrnd
conncclion
8
I
Mic
I
rnicronhone
inout
#
I
()
I ['ower
ground
rnain
nower sround
inout
l0
I RxD
ItS232
serial
data inoul
ll o Serial
cround
ILS232 sisnal
sround
t2
I Intercorl
select
intercorn
{unction
selcct. oulled
low to turn
on
the
intercom
lirnction
IJ o Ar-rdio
ground
spcaker and heaclnhune
ground
connection
t4
o
Headrrhone
headphone
terminal outpr-rl
t5
I
Mic
2
nricroplrone
input #2
l,ii;
li
,,r1!,1i
,]
r
'
I
r,5r
,
i
Viewed
fiorl
rear of
unit
I8
SL40 Installatiott Manual