GE 940, Instructions For Use Manual

Page: 25 / 36

Connect the reader to the micro 21
No
te
:
1
Two
470
o
hm
, 1/
2W
, pull
-up r
esi
st
or
s
m
ay be
re
quir
ed
be
tw
een +12
V
D
C and RE
AD
ER D
AT
A 1
and
D
AT
A 0.
The pu
ll-u
p r
esi
st
or
sho
ul
d be ins
tall
ed at t
he micr
oc
on
tr
ol
le
r’
s t
erm
ina
l blo
ck
. Ref
er
to
the appr
op
riat
e
m
icr
oc
on
tr
oller ma
nual
fo
r ins
tall
atio
n r
equ
irem
ents.
2
Shiel
ded
ca
ble
is
re
qui
red. Co
nn
ec
t a
ll shiel
ds t
ogeth
er
at the micr
o o
r panel
end
us
ing 14
-A
W
G
wir
e.
Do
no
t mak
e
sh
ield co
nnecti
on
s at the r
eader
. Do
no
t pair
W
ieg
and D
AT
A 1 and D
AT
A 0.
3
Ref
er
to
th
e ap
pr
opr
iat
e
m
icr
oc
ont
rol
le
r m
anua
l f
or
s
pec
ifi
c
wi
ring
det
ai
ls
.
4
Bl
oc
kin
g
dio
de
m
ay be
ty
pe
1N58
17 o
r G
E
pa
rt
nu
mbe
r 52
122
400
1
(inc
lud
ed
w
ith
re
ade
r).
Th
e
di
od
e mus
t be
in
sta
lle
d in a se
cu
re
lo
ca
tio
n,
no
t a
cc
ess
ible
thr
ough the
re
ad
er
re
mo
va
l.
5
Pr
ot
ec
tio
n d
io
de
s mus
t be
1
N
400
2, 1N4
003
, o
r 1
N
400
4 f
or
th
e
do
or
st
rik
e asse
mb
ly.
6
Fu
se, po
w
er supp
ly, do
or
str
ik
e,
d
io
de
s,
an
d r
elay
a
re
pr
ov
id
ed by the inst
aller
.
7
Reques
t t
o exi
t (R
EX
) t
er
m
in
al
s on t
he r
eader
a
re
no
t t
o
be
connect
ed fo
r UL l
is
ted i
ns
tal
la
tio
ns
.