112 AO2000 CONTINUOUS GAS ANALYZERS | OI/AO2000-EN REV. B
Digital I/O module: Electrical connections
Digital inputs DI1 to DI4
Opto-electronic coupler with 24 V DC As an alternative, activation by floating
contacts with an external voltage of 12 to 24 V DC or by Open-Collector driv-
ers PNP or NPN.
Digital outputs DO1 to DO4
Floating double-throw contacts, max. contact load rating 30 V/1 A.
The relays must always be operated within the specified data. Inductive or
capacitive loads are to be connected with appropriate protective measures
(freewheeling diodes for inductive and series resistors with capacitive
loads).
Relays are shown in the unpowered state. The unpowered state corresponds
to the state in the event of a fault ("fail safe").
Design
2x12-pole plug-in terminal strip. Please refer to the information about the
requisite material (see page 116)!
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