10
IM 12D06D05-01E
3-3-5. Grounding the housing
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.
The minimum cross sectional area of the pro-
tective 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.
DANGER
Figure 3-7. Input and output connections
63
66
65
61
22
21
12
16
15
-
+
-
+
mA OUTPUTS
62
11
17
TEMP
mA2
SHLD
CONTACT
SENSOR(S)
REFER TO INSTRUCTION MANUAL FOR CONNECTIONS
ISC
mA1
(+HART)
14
COILS
RECEIVE
DRIVE
SHLD
+
-
13
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)
2
1
-
+
DC
POWER
12-24 V /10 W
FUSE: 2A/250 VAC/T
2
1
N
L
AC
POWER
100-240 VAC/15 VA/ 50/60Hz
FUSE: 500 mA/250 VAC/T
Fuse replacement should be performed only by
a qualified service person.
See Sec.7. MAINTENANCE, Fuse.
Fuse ratings:
Power supply
Fuse type
12-24VDC, 10W max
2A/250V, Slow
100-240VAC, 15VA max 0.5A/250V, Slow
3-3-2. Access to terminal and cable entry
Terminals 1 and 2 are used for the power sup-
ply. Guide the power cables through the gland
closed to the power supply terminals. The ter-
minals will accept wires of 2.5 mm
2
(14 AWG).
Always use cable finishings if possible.
WARNING
3-3-3. AC power
Connect terminal L to the phase line of the
AC power and terminal N to the zero line. See
figure 3-8 for the power ground.
3-3-4. DC power
Connect terminal 1 to the positive outlet and
terminal 2 to the negative outlet.
The size of conductors should be at least 1.25
mm
2
. The overall cable diameter should be
between 7 & 12 mm.
Содержание EXAxt 450
Страница 1: ...IM 12D06D05 01E 4th Edition User s Manual Model ISC450G Style S2 Inductive Conductivity Converter ...
Страница 8: ...vi ...
Страница 23: ...15 IM 12D06D05 01E 3 INSTALLATION AND WIRING Figure 3 11 a Figure 3 11 b Figure 3 11 c ...
Страница 54: ...46 IM 12D06D05 01E ...
Страница 55: ...47 IM 12D06D05 01E 10 SPARE PARTS 10 SPARE PARTS See Customer Maintenance Parts List ...
Страница 66: ...58 IM 12D06D05 01E APPENDIX 6 Control drawing for FM approval ...