Supply and switching units NxxU are used for energizing of NAMUR output sensors (DLS–27Xi, CPS–24Xi, etc.) located in hazardous explosive areas. Due to the state of the connected sensor, they switch their output changeover relay contact or a transistor switch. Moreover, they can provide a simple 2-state level regulation (pump-up and pump-down control).

Features

• For energizing and state-detection of NAMUR sensors (EN 60947-5-6)
• The connected sensor can be located in hazardous explosive areas up to zone 0
• Relay or transistors output
• High-frequency switching (up to 2kHz – ver. “T”)
• LED state indication
• Power supply 230 V AC or 24 V DC
• Mounting on DIN rail 35 mm

Features of Variants

• NSSU – 811 Single channel unit without additional functions for supply and state detection of one NAMUR sensor. Output invariant “T” (transistor switch) or “R” (relay contact).
• NSSU – 812 Single channel unit with LFD* system for supply and state-detection of one NAMUR sensor. Output invariant “R” (relay contact).
• NDSU – 822 Dual channel unit without additional functions for supply and state detection of two NAMUR sensors. Output invariant “T” (transistor switch) or “R” (relay contact).
• NLCU – 821 2-state level regulation unit using two connected limits NAMUR sensors. Output invariant “R” (relay contact).
• NLCU – 822 2-state level regulation unit with LFD* system using two connected NAMUR sensors, protection against non-logical states of level sensors. Output invariant “R” (relay contact).

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Specification

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