86
+
–
A – Voltage
+
–
Diode supplied in
accessory pack.
B – Current
+
–
C – Thermocouple
Each lead must be of equal
resistance and less than 50
D – 3-lead RTD
Sleeved
Link
E – 2-lead RTD
(and resistance)
+
–
3rd Ld
White
Red
Red
+
–
3rd Ld
White
Red
+
–
+
–
Tx
+
–
2-wire Transmitter Power Supply
(24V DC, 70mA max.)
Analog I/P
e
l
p
u
o
c
o
m
r
e
h
T
f
o
e
p
y
T
e
l
b
a
C
g
n
i
t
a
s
n
e
p
m
o
C
3
4
8
1
S
B
1
.
6
9
C
M
I
S
N
A
4
1
7
3
4
N
I
D
0
3
.
o
N
t
r
a
P
7
3
9
4
S
B
+
–
e
s
a
C
+
–
e
s
a
C
+
–
e
s
a
C
+
–
e
s
a
C
)
K
(
l
A
-
i
N
/
r
C
-
i
N
n
w
o
r
B
e
u
l
B
d
e
R
w
o
ll
e
Y
d
e
R
w
o
ll
e
Y
d
e
R
n
e
e
r
G
n
e
e
r
G
n
e
e
r
G
e
t
i
h
W
n
e
e
r
G
*
)
E
(
i
N
-
u
C
/
r
C
-
i
N
–
–
–
–
–
–
t
e
l
o
i
V
e
t
i
h
W
t
e
l
o
i
V
*
)
N
(
li
s
i
N
/
li
s
i
r
c
i
N
e
g
n
a
r
O
e
u
l
B
e
g
n
a
r
O
e
g
n
a
r
O
d
e
R
e
g
n
a
r
O
–
–
k
n
i
P
e
t
i
h
W
k
n
i
P
*
)
S
d
n
a
R
(
h
R
-
t
P
/
t
P
e
t
i
h
W
e
u
l
B
n
e
e
r
G
k
c
a
l
B
d
e
R
n
e
e
r
G
d
e
R
e
t
i
h
W
e
t
i
h
W
e
g
n
a
r
O
e
t
i
h
W
e
g
n
a
r
O
*
)
B
(
h
R
-
t
P
/
h
R
-
t
P
–
–
–
–
–
–
y
e
r
G
e
t
i
h
W
y
e
r
G
*
)
T
(
i
N
-
u
C
/
u
C
e
t
i
h
W
e
u
l
B
e
u
l
B
e
u
l
B
d
e
R
e
u
l
B
d
e
R
n
w
o
r
B
n
w
o
r
B
n
w
o
r
B
e
t
i
h
W
n
w
o
r
B
*
)
J
(
n
o
C
/
e
F
w
o
ll
e
Y
e
u
l
B
k
c
a
l
B
e
t
i
h
W
d
e
R
k
c
a
l
B
d
e
R
e
u
l
B
e
u
l
B
k
c
a
l
B
e
t
i
h
W
k
c
a
l
B
*
s
t
i
u
c
r
i
c
e
f
a
s
y
ll
a
c
i
s
n
i
r
t
n
i
r
o
f
e
u
l
B
e
s
a
C
*
)
0
1
7
3
4
N
I
D
(
n
o
C
/
e
F
–
–
–
–
0
1
7
3
4
N
I
D
–
–
d
e
r
/
e
u
l
B
e
u
l
B
e
u
l
B
…7
INSTALLATION
…7.5
Analog Input Connections
(refer to Section 7.9 for 500V isolation option)
7.5.3
Current and Voltage – Fig. 7.10
Caution.
• To avoid damage to multi–channel instruments, high
common mode voltages up to 250V r.m.s. max.
must be present on all channels, or not at all.
• The maximum channel–to–channel voltage
(between any two channels) must not exceed 12.5V
or permanent damage to the instruments input
circuitry may occur. To prevent such damage link the
negative terminals on all inputs.
• For applications where the available 12.5V isolation
is required, the link(s) between the relevant channel
and the other channel(s) should not be fitted.
7.5.4
Thermocouple – Fig. 7.10
Use the correct compensating cable between the thermocouple
and the terminals – see Table 7.1.
Automatic cold junction compensation (ACJC) is incorporated
but an independent cold (reference) junction may be used.
7.5.5
Resistance Thermometer (RTD) – Fig. 7.10
If long leads are necessary it is preferable to use a 3-lead
resistance thermometer.
If 2-lead resistance thermometers are used each input must be
calibrated to take account of the lead resistance.
7.5.6
Transmitter Power Supply – Fig. 7.11
Caution.
Under no circumstances must the
spare input terminal be linked to the negative
.
Note.
Refer also to Fig
.
7
.
7 for terminal numbers
.
Fig. 7.10 Analog Input Connections
Fig. 7.11 Transmitter Power Supply
Table 7.1 Thermocouple Compensating Cable
