Bussed 24VDC DO The Digital Output Bussed 24VDC has provisions for both internal and external field power excitation. As a bussed output device, all of the outputs share a common return (ground). All outputs get their power from the same source, which can be either the system power supply or an externally connected 24V power supply. When selection is from an external source, outputs can be galvanically isolated from the Series C power system. A wiring option on the IOTA determines if outputs are referenced to the Series C system power or an external field power source. FAILOPT Series C DO module will support FAILOPT parameter on a per channel basis. The output can be directed by configuration to either HOLD THE LAST VALUE, or SHED to a SAFE VALUE. The safe value can be configured by the user.
Universal Input Output
• Each channel user configurable as:
• Analog Input
• Analog Output
• Digital Input • Digital Output
• Pulse Input (channels 15-18)
• Open Wire Detection • Fast Scan (Priority I/O Module Scan)
• Electronic short circuit protection1
• Safe-state (FAILOPT) behaviors configurable on a per channel basis for Digital / Analog Output
• HART 7 support (analog IO)
• Extended Temperature Range -40 to +70°C module ambient
Note
1: Dependent on actual channel configuration for the module and the environment. Please refer to the User’s Guide for calculation method. Note 2: Please refer to the User’s Guide for calculation method to determine channel usage versus operating temperature. Note 3: Short circuit will be limited to less than 1.4 Amps within 2 microseconds, and to 750 mA within 10 microseconds. If the short period persists more than 10 mili seconds, the DO channel will be shutof
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