16 Part number HA028582. Issue 6.0 May-07
2.9
Output 4 (AA Relay)
Output 4 is always a relay.
Relay Output
(Form C)
•
Isolated output 240Vac CATII
•
Contact rating: 2A 264Vac resistive
•
Output functions: Heating, or cooling,
or alarm or motorised valve open or
closed
* General Notes about Relays and Inductive
Loads
High voltage transients may occur when switching
inductive loads such as some contactors or solenoid
valves. Through the internal contacts, these transients
may introduce disturbances which could affect the
performance of the instrument.
For this type of load it is recommended that a
‘snubber’ is connected across the normally open
contact of the relay switching the load. The snubber
recommended consists of a series connected
resistor/capacitor (typically 15nF/100
Ω
). A snubber
will also prolong the life of the relay contacts.
A snubber should also be connected across the output
terminal of a triac output to prevent false triggering
under line transient conditions.
WARNING
When the relay contact is open, or it is connected
to a high impedance load, it passes a current
(typically 0.6mA at 110Vac and 1.2mA at 240Vac).
You must ensure that this current will not hold on
low power electrical loads. If the load is of this
type the snubber should not be connected.
OP4
AA
AB
AC
Summary of Contents for 3200
Page 1: ...3200PID Temperature controllers User Guide Manuel Utilisateur Bedienungsanleitung ENG FRA GER ...
Page 57: ...3200Régulateurs de température PID Manuel Utilisateur FRA ...
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Page 116: ...58 3200 Guide utilisateur HA028582FRA Indice 6 0 mai 07 ...
Page 117: ...3200PID Temperaturregler Bedienungsanleitung GER ...
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