YOKOGAWA av550g, User Manual

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<8. Detailed Data Setting>
8-11
IM 11M12D01-01E
8.3 Setting Contact Outputs
The averaging converter provides the following outputs:
1) “Function” contact outputs (DO1~DO4): Function can be allocated by user.
2) Common (representative) error contact (DO5): Represents an error in any channel.
3) Individual channel error contacts (DO-CH1~DO-CH8): Individual channel error outputs, one per
channel.
For details of errors, refer to Section 12.1 Displays and Remedies When Errors Occur.
Each contact output is Form C (transfer contact) with three terminals: COM / NC / NO
(COM=common, NC=Normally Closed, NO=Normally Open) using a mechanical relay with non-
wetted contacts. Ensure that contact rating is not exceeded.
The four function-specific contact outputs can be programmed to be normally operated (NC or NO
selectable). For safety the error contacts are factory fixed to be normally closed. How to assign
conditions to function contact outputs is described below. Table 8.4 shows the conditions that can be
assigned to function-specific contacts.
Table 8.4 Conditions that can be allocated to function-specific contacts
Item Condition for contact output
Alarms
High High Alarm If ON then High High alarm results in contact output. However, High High alarm must be ON
(enabled).
Refer to Section 8.2 Setting Oxygen Concentration Alarms.
High Alarm If ON then High alarm results in contact output. However, High alarm must be ON (enabled).
Refer to Section 8.2 Setting Oxygen Concentration Alarms.
Low Alarm If ON then Low alarm results in contact output. However, Low alarm must be ON (enabled).
Refer to Section 8.2 Setting Oxygen Concentration Alarms.
Low Low Alarm If ON then Low Low alarm results in contact output. However, Low Low alarm must be ON
(enabled).
Refer to Section 8.2 Setting Oxygen Concentration Alarms.
CAL Coefficient Alarm If ON then calibration-time Zero coefficient error, Span coefficient error, or an electrode potential
stability error results in contact output.
CAL Gas Pressure Low If ON then a contact input indicating calibration gas pressure low results in contact output.
This is a calibration gas pressure low answerback signal.
Corresponding contact input must be allocated to calibration gas pressure low.
Process Gas Alarm If ON then a contact input indicating process gas pressure alarm results in contact output.
This is a process gas pressure alarm answerback signal.
Corresponding contact input must be allocated to process gas pressure alarm.
Temperature Alarm If ON then if internal temperature of averaging converter is over limit, contact output occurs. When
the converter is used under severe environmental temperature conditions, you can use this contact
to switch on a cooler.
Error If ON then any type of error causes contact output.
Acts the same as common error contact.
Other statuses
Warmup If ON then during warmup there is contact output.
For definition of warmup, see Subsection 8.1.2 Setting Output Hold.
Output Range Switching If ON then while contact-input range-switching signal is detected,then there is contact output.
This is a range-switching input answerback signal.
Corresponding contact input must be allocated to measurement range switching.
Maintenance If ON then while (under) maintenance there is contact output.
For definition of (under) maintenance, see Subsection 8.1.2 Setting Output Hold.
Calibration If ON then while (under) calibration there is contact output.
For definition of (under) calibration, see Subsection 8.1.2 Setting Output Hold.
Indication Check If ON then during indication check there is contact output.
For definition of indication check, see Section 10.4 Indication Check.
Blow back If ON then there is Blow back switch contact output.
For definition of blow back, see Section 10.5 Blow back.
3rd Check Gas If ON then during indication check, there is contact output to operate 3rd Check Gas solenoid valve.
For definition of indication check, see Section 10.4 Indication Check.