תיאור
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 state of connected sensor they switch their output changeover relay contact or transistor
switch. Moreover they can provide simple 2-state level regulation (pump-up and pump-down control).
Classifi cation of explosive-proof performance:
II (1)G [Ex ia] IIC
I (M1) [Ex ia] I
FEATURES OF VARIANTS
• NSSU – 811 Single channel unit without additional functions for supply and state detection of one NAMUR
sensor. Output in variant "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
in variant "R" (relay contact).
• NDSU – 822 Dual channel unit without additional functions for supply and state detection of two NAMUR sensors.
Output in variant "T" (transistor switch) or "R" (relay contact).
• NLCU – 821 2-state level regulation unit by means of two connected limit NAMUR sensors. Output in variant
"R" (relay contact).
• NLCU – 822 2-state level regulation unit with LFD* system by means of two connected NAMUR sensors,
protection against non-logical states of level sensors. Output in variant "R" (relay contact).