SITRANS LVS200 Overview

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SITRANS LVS200 Overview

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Thương hiệu: Siemens
Danh mục:

SITRANS LVS200
Tình trạng:
Còn hàng
Giá:Liên hệ

SITRANS LVS200 là công tắc đo mức điểm rung để phát hiện mức chất rắn khối lượng lớn, mức thấp hoặc mức yêu cầu.

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Overview

SITRANS LVS200 is a vibrating point level switch for high, low, or demand level detection of bulk solids.

Benefits

High resistance to mechanical forces
Strong vibration resistance to high bulk material loads
Rotatable enclosure for convenient wiring
Suitable for low density material: standard version, 20 g/l (1.3 lb/ft³); liquid/solid interface version, 50 g/l (3 lb/ft³) and low density option min. 5 g/l (0.3 lb/ft³)
Customer desired extensions up to 20 000 mm (787 inch)
Optional detection of solids within liquid
Durable short fork option with 165 mm (6.5 inch) insertion length

Application

The standard LVS200 detects high, low, or demand levels of dry bulk solids in bins, silos, or hoppers. The liquid/solid interface version can also detect settled solids within liquids or solids within confined spaces such as feed pipes. It is designed to ignore liquids in order to detect the interface between a solid and a liquid.

A pipe extension version is available with either the standard or liquid/solid interface electronics and fork, separated by a customer supplied 1 inch pipe.

SITRANS LVS200 has an optional 4 to 20 mA output for monitoring buildup on the fork to determine when preventative maintenance should be performed in sticky applications.

The LVS200 has a compact design and can be top, side or angle mounted. The vibrating fork design ensures the tines are kept clean. The unique design of the fork and crystal assembly eliminates false high level readings even if tines become damaged.

A signal from the electronic circuit excites a crystal in the probe causing the fork to vibrate. If the fork is covered by material, the change in vibration is detected by the electronic circuitry which causes the relay to change state after a one second delay. When the fork is free from material pressure, full vibration resumes and the relay reverts to its normal condition.

Key Applications: dry bulk solids in bins, silos, hoppers or settled solids within liquids (interface version)

Technical specifications

SITRANS LVS200
Mode of operation
Measuring principle	Vibrating point level switch
Input
Measured variable	High, low, and demand
Measuring frequency
Standard	125 Hz
Liquid/solid interface and short fork version	350 Hz
Output
PNP	Open collector: Permanent load max. 0.4 A, short-circuit and overload protected Turn-on voltage: max. 50 V (reverse protection)
2-wire without contact	Load current: Min. 10 mA Max. 500 mA permanent Max. 2A < 200 ms Max. 5A < 50 ms Voltage drop on the electronic module: max. 7 V with closed electric circuit Cut-off current with open electric circuit: max. 5 mA
Relays
Version with 1 relay	SPDT relay
Version with 2 relays	DPDT relay
Relay delay	From loss of vibration: approximately 1 second From resumption of vibration: approximately 1 ... 2 seconds
Signal delay	Probe uncovered to covered: approximately 1 second Probe covered to uncovered: approximately 1 ... 2 seconds
Relay fail-safe	High or low, switch selectable
Alarm output	Relay 8 A at 250 V AC, non-inductive Relay 5 A at 30 V DC, non-inductive
mA output	8/16 mA or 4 ... 20 mA
Resolution	4 ... 20 mA ± 0.1 mA
Sensitivity	High or low, switch selectable
Rated operating conditions
Installation conditions
Location	Indoor/outdoor
Ambient conditions
Ambient temperature	‑40 ... +60 °C (‑40 ... +140 °F)
Storage temperature	‑40 ... +80 °C (‑40 ... +176 °F)
Installation category	III
Pollution degree	2
Medium conditions
Process temperature	All except CSA Class II, Group G: -40 ... +150 °C (-40 ... +302 °F) CSA Class II, Group G: -40 ... +140 °C (-40 ... +284 °F), CSA temperature code T3B
Max. threaded bushing temperature	80 °C (176 °F)
Max. enclosure surface temperature (Category 2D)	90 °C (194 °F)
Max. extension surface temperature (Category 1D)	150 °C (302 °F)
Pressure (vessel)	Max. 30 bar g (435 psi g) European Pressure Directive 2014/68/EU: Category 1
Minimum material density	Standard version: approx. 20 g/l (1.2 lb/ft³) Liquid/solid interface version: approx. 50 g/l (3 lb/ft³) Optional low density version: approx. 5 g/l (0.3 lb/ft³)
Design
Material
Enclosure	Epoxy coated aluminum
Process connection	Thread 1½" NPT [(Taper), ANSI/ASME B1.20.1], R ½" [(BSPT), EN 10226], and flange options Optional sliding bushing with 2" NPT [(Taper), ANSI/ASME B1.20.1] or BSP thread Thread material: stainless steel 303 (1.4301)
Tine material	Stainless steel 316L (1.4404), PTFE-coated tines are available upon special request
Degree of protection	IP65/Type 4/NEMA 4
Conduit entry	2 x M20 x 1.5 or 2 x ½" NPT (For FM and CSA approved versions only.)
Weight	Standard version, no extensions: approx. 2.0 kg (4.4 lb) Solids/liquids version, no extensions: approx. 1.9 kg (4.2 lb)
Power supply	19 ... 230 V AC, +10 %, 50 ... 60 Hz, 8 VA 19 ... 55 V DC, +10 %, 1.5 W
Certificates and approvals
	CSA/FM General Purpose CE CSA/FM Dust Ignition Proof RCM ATEX II 1/2 D CSA/FM IS Class I, II, III Div. 1, Groups A, B, C, D, E, F, G, FM Class I, Aex ia IIC, CSA Class I, Ex ia IIC, available only with power supply options 5 and 6 ATEX II 1G and 1/2 G Eex ia IIC; ATEX II 1D and 1/2 D, available only with power supply option 5

Dimensional drawings

SITRANS LVS200, dimensions in mm (inch)

Circuit diagrams

SITRANS LVS200 connections

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SITRANS LVS200 Overview

Overview

Benefits

Application

Technical specifications

Dimensional drawings

Circuit diagrams