NAMUR NSSU, NDSU en NLCU INTRINSICALLY SAFE SUPPLY UNITS


 

  • For energizing and state-detection of NAMUR sensors (EN 60947-5-6)
  • 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

 

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:
EEX  II (1)G [Ex ia] IIC
EEX   I (M1) [Ex ia] I

 

 

Description

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).

* LFD – Line Fault Detection (detection of short circuit or line break)

 

CORRECT SPECIFICATION EXAMPLES

  • NSSU–811–230V–T
  • NDSU–822–24V–T
  • NLCU–821–230V–R
  • NSSU–812–230V–R
  • NDSU–822–230V–R
  • NLCU–822–24V–R

 

SAFETY, PROTECTION, COMPATIBILITY AND EXPLOSION PROOF

Connection to the supply line can be realised only through a fuse or a circuit breaker (max. 16 A). NSSU–811–T and NSSU–812–T units (with transistor switch) are equipped with protection against reverse polarity and current overload output terminals.
Working areas according to EN 60079-10 without risk of explosion, or in the fl ameproof enclosure "d".
Electrical equipment of protection class II. Electrical safety according to EN 61010-1. Electromagnetic compatibility according to EN 55022, EN 61000-6-2, EN 61000-4-2,-3, -4, -5, -6 and -11. The intrinsic safety of input terminals of the unit according to EN 60079-0 and EN 60079-11. Explosion proof of Intrinsically safe supply units examined by FTZÚ-AO 210 Ostrava-Radvanice, certifi cate No.: FTZÚ 04 ATEX 0136X.

 

 

Specifications

principe
House
meetelement
Process Connection
uitgang Contacten
Nominal diameter
Brand Dinel
materiaal
Manometer diameter
glycerine
Hygienic Non hygienic
Ask a quotation for this product

Related Products

You may also be interested in the following products:

DLS-27 CAPACITIVE LEVEL SENSORS

DLS-27 CAPACITIVE LEVEL SENSORS

CPS-24 CAPACITIVE PROXIMITY SWITCH

CPS-24 CAPACITIVE PROXIMITY SWITCH

© 2012-2018 Ebora Process Automation is a trademark of Ebora BV - 't Veld 3 - S, Heteren, Netherlands - info@ebora.nl