SMAR if303, Operation, Maintenance & Instruction Manual, Page: 47 / 52

Technical Characterisitcs
5.3
FIE
L
DB
US
I.S.
BAR
R
IER
V
o
c <=
2
4
V
Isc <
=
2
5
0
m
A
+
FI
ELD
B
U
S
AS
SO
CI
A
T
ED
A
P
P
A
RA
TU
S
+
-
PO
W
E
R
SU
P
P
L
Y
-
+
+
-
4
to 20
mA
I.S.
BAR
R
IER
V
o
c <
=
3
0
V
I
sc <=
1
1
0
m
A
12
3
4
co
mm.
+-
4-
20
mA
IS
D
EVIC
E
# 3
-
+
4-
20
mA
IS
D
EVIC
E
# 2
-
+
4-
20
mA
IS
D
EVIC
E
# 1
-
+
GROUND BU
S
IN1
IN
2
IN3
CO
MM
+
-
OPT
ION
AL
SH
IE
L
D
IN
G
FI
ELDBUS
NON HAZARDOUS
OR
DIVIS
IO
N 2
A
R
E
A
UN
SPEC
IF
IED,
EXCEPT
T
H
A
T
I
T
M
U
ST
NO
T
BE
S
U
PP
LIED F
R
O
M
, NO
R CONT
AIN
UNDE
R
NO
RM
AL
O
R
A
B
NO
RM
A
L
C
O
N
D
IT
IONS
,
A
SO
U
RCE
OF
POTENTIA
L
IN
RELA
TION
T
O
EAR
T
H
IN
E
X
CES
S
OF
2
5
0V
AC OR 250
V
DC.
SAF
E ARE
A
APP
ARA
T
U
S
HAZARD
OUS A
R
EA
RE
QUI
R
EM
E
N
TS:
1
- INS
T
AL
L
A
T
IO
N
MU
ST
BE
I
N
A
C
C
O
R
D
AN
C
E
W
IT
H
TH
E N
A
TI
ON
AL
E
L
EC
T
R
IC
AL
C
O
DE
(ANSI
/ NFP
A
70)
A
N
D
ANS
I/
ISA
-R
P12.
6.
2
-
T
R
A
N
S
M
IT
T
E
R
S
P
EC
IF
IC
A
T
IO
N
MU
S
T
B
E
IN
AC
CO
R
D
A
N
C
E
T
O
AP
PROV
A
L
L
IST
ING
.
3
-
ASSOC
IA
T
ED
A
P
P
A
RA
T
U
S G
R
OU
ND BU
S
T
O
BE INS
U
LA
TED FR
OM P
A
N
E
LS
AN
D MO
U
N
TIN
G
EN
CLO
S
URE
S.
4
-
ASSOC
IA
T
ED
A
P
P
A
RA
T
U
S G
R
OU
ND BU
S
R
E
SI
ST
ANCE
T
O
EA
R
T
H M
U
S
T
B
E
SM
A
LLER
THAN
1(ONE
) O
H
M.
5
-
O
BSE
R
V
E
TR
ANS
M
IT
T
E
R PO
W
E
R
SU
PPL
Y
LO
AD CU
R
VE.
6
-
W
IR
E
S:
T
W
IS
T
E
D
P
A
IR
, 2
2
A
W
G
O
R
L
A
R
G
ER
.
7
-
SH
IE
L
D
I
S
OP
T
ION
A
L
I
F
U
S
ED
,
BE
S
U
R
E
T
O
IN
S
U
L
A
T
E
T
H
E
EN
D
N
O
T
GRO
U
N
D
ED
.
8
-
C
ABLE
CA
P
A
C
IT
A
N
C
E
AN
D IN
DU
T
A
N
C
E
PL
U
S
Ci
AN
D Li MU
ST
BE
S
M
ALLER
TH
AN
Ca
AN
D La
O
F
T
H
E
AS
SOC
IA
T
ED
APP
A
RA
TUS
.
FM
COM
P
O
N
E
N
T
S
CAN
NOT
BE
S
U
BS
T
ITUTE
D WITH
OU
T
PR
E
V
IO
U
S MA
N
U
F
AC
TU
R
E
R
A
PPRO
V
AL.
MO
DEL
I
F302
& I
F303
-
SE
RI
ES
C
L
AS
S
I,
II
,I
II
D
IV
.1
,
G
R
O
U
PS
A,
B,
C
,D
,E,F
&
G
ENTI
TY
V
A
LUES
:
F
IE
L
D
B
U
S
4
-2
0
m
A
Ci
=
5nF
Li
=
12uH
Im
ax <
=
250m
A
Ci=5
n
F
Li=12uH
Vmax <
=
24V
Vm
a
x
<
=
3
0
V
Im
ax <= 1
1
0mA
E
N
TITY
P
A
RAM
E
TERS
F
O
R
ASSOC
IA
T
ED
APP
AR
A
T
U
S
C
L
ASS I,I
I,III
D
IV
.1, GR
OUPS
A,B,C
,D
,E,F
& G
C
a
>= C
ABLE CA
P
A
CIT
A
N
C
E
+5nF
L
a
>=
CA
LE IND
U
C
T
AN
CE +
1
2
u
H
FI
EL
D
B
US
OP
TI
ON
1
Vo
c
<
=
2
4
V
Isc
<=2
50
mA
Po
<
=
1,
2
W
OP
TIO
N
2
Vo
c
<
=
1
6
V
P
o
<= 1,
2W
+
-
PO
W
E
R
SU
P
P
L
Y
+