System 800xA offers flexible and modular I/O solutions through fieldbus technologies and hardwired I/O systems like S800 and S900. The system is now enhanced with Select I/O that allows to condition each signal coming from the field individually. Select I/O is Ethernet connected and consist of single channel granular Signal Conditioning Modules (SCM).

DOS810 a Digital Output 24V 0.6A Signal Conditioning Module.

Features and benefits

• Digital output for 2-wire field devices
• 24 V / 0.6 A current sourcing
• Can be used in hazardous areas
• Field power sourced from the power injection
• Short circuit proof, electronically current limited to 0.6 A
• Built-in inductive load suppression, free-wheeling diode
• Galvanic isolation
• Protected against wrong wiring

• Diagnostics:
– Loop supervision (open circuit and short circuit)
– Hardware error supervision
– Communication supervision
– Internal power supervision
– Power injection supervision

• OSP (Output Set to Predetermined value)
• Single loop granularity - each SCM handles a single channel.
• Supports hot swap
• Mechanical locking slider which turns off field device power and/or output before removal.
• Field disconnect function which can galvanically separate the field loop wiring from the SCM during commissioning and maintenance.
• All SCMs have electronic current limitation
• Mechanical keying to prevent insertion of wrong module type after commissioning.
• 24V DC powered through Modulebus
• Configurable through parameters
• LED indicators on the SCM indicate the operational state of the module.