YOKOGAWA ISC450G User Manual

11
IM 12D06D05-01E
3 INSTALLATIONANDWIRING
3-4. Wiring the contact signals
3-4-1. General precautions
The contact output signals consist of volt-
age-free relay contacts for switching electrical
appliances(SPDT).Theycanalsobeusedas
digital outputs to signal processing equipment
(suchasacontrollerorPLC).Itispossibleto
use multi-core cables for the contact in and
output signals and shielded multi-core cable for
the analog signals.
3-4-2. Contact outputs
TheEXAxt450unit’sfourcontacts(switches)
that can be wired and configured to suit user
requirements.ContactS4isprogrammedas
a fail-safe contact. Please refer to section 5-7,
Contact output setup for functionality descrip-
tion.
Alarm (limits monitoring)
Contactsconfiguredas“ALARM”canbeener-
gized when limits are crossed.
Fail
Contactsconfiguredas“FAIL”willbeenergized
whenafailsituationoccurs.Somefailsitua-
tions are automatically signaled by the internal
diagnostics (electronics) of the converter.
Otherscanbeconfiguredbytheuser(see
section5-11ErrorConfiguration).Bypressing
the“INFO”buttononthemainscreentheuser
is given an explanation as well as a remedy for
the current fail situation. Always connect the fail
contact to an alarm device such as a warning
light, alarm bell or displayed on an annunciator.
“ALARM” Contact “FAIL” Contact
PowerOff NC NC
PowerOn NC NC
Alarm NO NC
Fail NC NO
FailandAlarm NC* NO
HOLD NC NC
* Whenafailsituationoccurswhichisrelated
to the parameter associated with the contact
(Conductivity, Concentration or temperature)
the contact will go to NC. When the fail
situation is not related to the parameter
associated with the contact the contact will
remain in the state it is currently in.
3-4-3. Contact input
It is necessary to use screening/shielding on
the input signal cables. Terminal 63 is used to
connect the shielding.
3-5. Wiring the mA-output signals
3-5-1. General precautions
The analog output signals of the EXAxt
transmit low power standard industry signals to
peripherals like control systems or strip-chart
recorders(Figure3-6).
3-5-2. Analog output signals
The output signals consist of active current
signalsof4-20mA.Themaximumloadcanbe
600 ohms on each.
(M4screw)
Figure 3-8-a. External grounding Figure 3-8-b. Internal grounding
2
N
1
L
POWER
100-240 VAC/15 VA/ 50/60Hz
FUSE: 500 mA/250 VAC/T
AC
(M4screw)

YOKOGAWA ISC450G Specifications

General

Brand	YOKOGAWA
Model	ISC450G
Category	Media Converter
Language	English