IM 12D08N05-01E
3-9
<3. INSTALLATION AND WIRING>
2
1
-
+
DC
POWER
12-24 V /10 W
FUSE: 2A/250 VAC/T
2
1
N
L
AC
POWER
FUSE: 500 mA/250 VAC/T
100-240 VAC/15 VA/ 50/60Hz
32
31
33
42
41
43
52
51
53
72
71
73
NC
C
NO
NC
C
NO
NC
C
NO
NO
C
NC
S1
S2
S3
CONTACTS
S4
250V / 5A
AC / DC
100VA / 50W
(fail-safe)
63
66
65
61
22
21
12
15
16
-
+
-
+
mA OUTPUTS
62
11
13
TEMP
mA2
SHLD
CONTACT
SENSOR(S)
REFER TO INSTRUCTION MANUAL FOR CONNECTIONS
SC
mA1
(+HART)
14
ELECTRODE
INNER
INNER
OUTER
OUTER
+
-
Figure 3.7 Input and output connections
3.3.5 Grounding the housing
NOTE
For the safety of the user and to protect the instrument against interference, the housing
must always be connected to ground. This has to be done by a large area conductor. This
cable can be fixed to the rear of the housing or by using the internal ground connections
using a braided wire cable. See figure 3.8.
WARNING
The minimum cross sectional area of the protective grounding wire should be 0.75 mm
2
.
3.3.6 Switching on the instrument
After all connections are made and checked, the power can be switched on from the power
supply. Make sure the LCD display comes on.
After a brief interval, the display will change to the measured value. If errors are displayed
or a valid measured value is not shown, consult the troubleshooting section (Chapter 8)
before calling Yokogawa.
