Rosemount 2555 Specifications

Product Data Sheet

00813-0100-2555, Rev AB

Rosemount™ 2555 Solids Level Switch

Capacitance Probe

January 2020

■

Very high sensitivity (dielectric constant, DK >= 1.5)

■

Supports high mechanical loads of up to 10 kN

■

Simple to install and set-up

■

Robust version for overpressure up to 363 psi (25 bar)

■

Temperature from -40 to 932 °F (-40 to 500 °C)

Rosemount 2555 January 2020

Introduction

Measurement principles

The Rosemount™ 2555 Solids Level Switch uses the principle of measuring capacitance through RF (Radio Frequency) to detect the presence or absence of a solids medium and monitors the change in capacitance between the probe and the silo wall.

When the solids medium in the vessel (silo) falls away from the probe level, it causes an increase in capacitance that is detected by the electronics and the output switches to indicate an 'uncovered' state.

When the solids medium in the vessel (silo) rises and covers the rod, it causes a decrease of capacitance that is detected by the electronics and the output switches to indicate a 'covered' state.

The electrical output will vary depending on the electronics selected.

Key features and benefits

■

Flexible, robust solids switch - suitable for point level measurement of nearly all types of bulk materials

■

Reliable measurement of materials with low dielectric constants (DK from 1.5)

■

Designed for operation in high temperatures and pressures of up to 932 °F (500 °C) and 363 psi (25 bar)

■

Simple and quick automatic calibration for easy commissioning

■

Special probe design with high resistance to material build-up for safe maintenance-free operation

■

Continuous self-checking diagnostics for condition monitoring with easy-to-read display and push buttons

■

Approvals for hazardous locations (gas and dust)

■

Versatile installation options:

rod version: vertical, horizontal, and angled installation

—

— cable version: vertical installation

Note

A listing of dielectric (DK) values for solids materials can be in the Dielectric Values (DK Values) Data Sheet on-line document.

Contents

Introduction...................................................................................................................................................................................... 2

Ordering information........................................................................................................................................................................ 4

Spares and accessories...................................................................................................................................................................... 8

Specifications.................................................................................................................................................................................. 10

Product certifications...................................................................................................................................................................... 15

Dimensional drawings..................................................................................................................................................................... 19

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January 2020 Rosemount 2555

Applications

■

Level measurements of most bulk solids materials, including:

Flour, grains, sugar, cement, granulate, carbon black, and materials with coating properties

—

■

All types of vessel from small process silos to large storage silos

■

Extreme-temperature and high-pressure applications

■

Environments with heavy vibration

■

High-reliability and high-safety

■

Approvals for hazardous and explosive environments

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Rosemount 2555 January 2020

Ordering information

The specification and selection of product materials, options, or components must be made by the purchaser of the equipment. See Materials selection for more information.

Table 1: Rosemount 2555 Ordering Information

The starred offerings (★) represent the most common options and should be selected for best delivery. The non-starred offerings are subject to additional delivery lead time.

Model Product description

2555 Rosemount Solids Level Switch - Capacitance Probe ★

Probe thermal profile

S Standard 10-mm diameter probe (T

M Medium 22-mm diameter probe (T

E Extreme 22-mm diameter probe (T

R Standard 4-mm diameter rope (T

P Medium 8-mm diameter rope (T

V Extreme 8-mm diameter rope (T

process

= -40 to +464 °F (-40 to +240 °C), Pop -14.5 to 363 psi (-1 to +25 bar)) ★

process

= -40 to +464 °F (-40 to +240 °C), Pop -14.5 to 363 psi (-1 to +25 bar)) ★

process

= -40 to +932 °F (-40 to +500 °C), Pop -14.5 to 145 psi (-1 to +10 bar)) ★

process

= -40 to +464 °F (-40 to +240 °C), Pop -14.5 to 363 psi (-1 to +25 bar)) ★

= -40 to +932 °F (-40 to +500 °C), Pop -14.5 to 145 psi (-1 to +10 bar)) ★

Materials of construction: process connection/active probe and inactive extension rod Profiles

D 303/304/321 Stainless steel (1.4301/1.4305/1.4541) All ★

E 303/304/321 Stainless steel (1.4301/1.4305/1.4541), PFA coating to active probe only S ★

F 303/304/321 Stainless steel (1.4301/1.4305/1.4541), PFA coating to rope only R ★

G 303/304/321 Stainless steel (1.4301/1.4305/1.4541), PFA coating S ★

S 316/316L Stainless steel (1.4404/1.4401) All ★

T 316/316L Stainless steel (1.4404/1.4401), PFA coating to active probe only S ★

U 316/316L Stainless steel (1.4404/1.4401), PFA coating to rope only R ★

V 316/316L Stainless steel (1.4404/1.4401), PFA coating S ★

Conduit entry / cable threads

1 M20 x 1.5, 1 off screwed cable gland + 1 off blind plug for CE, ATEX, and IECEx ★

2 M20 x 1.5, 2 off screwed cable glands ★

3 M20 x 1.5, 1 off screwed cable gland + 1 off blind plug for FM ★

4 NPT ½-in. tapered ANSI B1.20.1 (1 off conduit + 1 off Ex-d blind plug) ★

Process connection size Profiles

(1)

¾-in./19 mm (DN25)/25A S and R ★

1-in./25 mm (DN25)/25A S and R ★

1.25-in./32 mm All ★

5 1.5 in./(DN38)/40A All ★

(1)

2 in./50 mm (DN50)/50A All ★

3 in./80 mm (DN80)/80A All ★

4 in./100 mm (DN100)/100A All ★

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Table 1: Rosemount 2555 Ordering Information (continued)

(1)

Process connection rating Sizes

AA ASME B16.5 Class 150 flange 2, 3, and 4 ★

DZ EN 1092-1 PN6 flange 4 ★

DA EN 1092-1 PN16 flange 4 ★

M30 x 1.5 mm S and R ★

M32 x 1.5 mm S and R ★

NN For use with non-flange process connection type All except 3

and 4

Process connection type Ratings

F Flat-face flange DZ and DA ★

R Raised-face flange AA ★

G BSPP (G) thread NN ★

N NPT thread NN ★

M Metric thread NN ★

C Tri Clamp (ISO 2852) NN ★

Electronic type

V Relay DPDT 21 to 230 Vac/Vdc ★

Active probe length Profiles

(2)

Standard length 3.94-in. (100 mm) S, M, and E ★

Standard length 7.87-in. (200 mm) S, M, and E ★

Standard length 11.8-in. (300 mm) S, M, and E ★

E Extended, customer-specified length in tenths of inches All ★

M Extended, customer-specified length in millimeters All ★

Specific extended active probe length All

★

00000 Factory default length (only if active probe length A, B, or C is selected) ★

XXXXX Specific customer-specified length in tenths of inches (XXXX.X inches) or millimeters (XXXXX mm) ★

Inactive extension length

(3)

No inactive extension ★

E Inactive extension, customer-specified length in tenths of inches ★

M Inactive extension, customer-specified length in millimeters ★

Specific inactive extension length

0000 Factory default length (only if inactive extension length A is selected) ★

XXXX Specific customer-specified length in tenths of inches (XXX.X inches) or millimeters (XXXX mm) ★

Product certifications Conduit entry

NA No hazardous locations certifications 1, 2, and 4 ★

(4)

ATEX, Dust Certification 1, 2, and 4 ★

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Table 1: Rosemount 2555 Ordering Information (continued)

(4)

(4)(5)

KZ American and Canadian Ordinary Location (unclassified, safe area) 2, 3, and 4 ★

Options (include with selected model number)

Calibration data certification

Q4 Certificate of functional test ★

IECEx, Dust Certification 1, 2, and 4 ★

American, DIP 2, 3, and 4 ★

American, Flameproof/Dust certification 4

IECEx, Flameproof/Dust certification 4

ATEX, Flameproof/Dust certification 4

(4)(5)

Technical Regulations Customs Union (EAC), Dust Certification 1, 2, and 4

ATEX, Flameproof/Increased Safety/Dust Certification 1, 2, and 4

IECEx, Flameproof/Increased Safety/Dust Certification 1, 2, and 4

(4)(5)

Technical Regulations Customs Union (EAC), Flameproof/Increased Safety/Dust certification 1, 2, and 4

American, Flameproof/Dust certification 4

Weather protection

P2 Weather protection cover ★

Electronics sensitivity configuration

V1 Calibrate to 0.5 pF ★

V2 Calibrate to 1 pF ★

V3 Calibrate to 4 pF ★

V4 Calibrate to 10 pF ★

Active probe extension Profiles

R0 Rigid, 316L (1.4404) stainless steel, 15.7 in. (400 mm) long, ø10-mm probe S ★

R1 Rigid, 316L (1.4404) stainless steel, 15.7 in. (400 mm) long, ø10-mm probe, includes fixing hole S ★

R2 Rigid, 316L (1.4404) stainless steel, 15.7 in. (400 mm), ø22-mm probe M, E, P, V ★

R3 Flexible, 304/303 (1.4301/1.4305) stainless steel, 39.4 in. (1000 mm) long, ø10-mm probe S ★

R4 Flexible, 304/303 (1.4301/1.4305) stainless steel, 39.4 in. (1000 mm) long,

S ★

ø10-mm probe, includes fixing hole

R5 Rope, 304/303 (1.4301/1.4305) stainless steel, 78.7 in. (2000 mm) long,

S ★

ø10-mm probe and ø4-mm rope

R6 Rope, 304/303 (1.4301/1.4305) stainless steel, 78.7 in. (2000 mm) long,

S ★

ø10-mm probe, includes fixing hole and ø4-mm rope

R7 Rope, 316L/316 (1.4404/1.4401) stainless steel, 78.7 in. (2000 mm) long,

S ★

ø10-mm probe and ø4-mm rope

R8 Rope, 316L/316 (1.4404/1.4401) stainless steel, 78.7 in. (2000 mm) long,

S ★

ø10-mm probe, includes fixing hole and ø4-mm rope

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Table 1: Rosemount 2555 Ordering Information (continued)

R9 Rope, 316L/316 (1.4404/1.4401) stainless steel, 78.7 in. (2000 mm) long,

M, E, P, V ★

ø22-mm probe, ø8-mm rope

Sliding sleeve

(6)

Profiles

S1 Sliding sleeve S, M, R, P ★

Extended product warranty

WR5 5-year limited warranty ★

Typical model number: 2555 S D 1 5 NN G V A 00000 A 0000 NA

(1)

This process connection size is not available when Materials of Construction codes G or V is selected.

(2)

This active probe length is not available when Materials of Construction codes F or U are selected.

(3)

The No Inactive Extension option is not available when Materials of Construction codes G or V is selected.

(4)

This product certification is available when Materials of Construction codes D or S are selected.

(5)

Contact your local Emerson representative for the availability of this option code.

(6)

The Sliding Sleeve option is not available when Materials of Construction codes G or V are selected.

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Rosemount 2555 January 2020

Spares and accessories

The specification and selection of product materials, options, or components must be made by the purchaser of the equipment. See Materials selection for more information.

The starred offerings (★) represent the most common options and should be selected for best delivery. The non-starred offerings are subject to additional delivery lead time.

Table 2: Spares

Part number Description

02500-1000-0106 Electronics board: Relay DPDT, universal voltage ★

02500-7000-0001 Extension: Rigid 316L SST (1.4404), 15.7 in. (400 mm) long, Ø10 mm probe ★

02500-7000-0002 Extension: Rigid 316L SST (1.4404), 15.7 in. (400 mm) long, Ø22 mm probe ★

02500-7000-0003 Extension: Flexible 304/303 SST (1.4301/14305), 39.4 in. (1000 mm) long, Ø10 mm probe ★

02500-7000-0004 Extension: Rope 304/303 SST (1.4301/14305), 78.7 in. (2000 mm) long, Ø10 mm probe, Ø4 mm rope ★

02500-7000-0005 Extension: Rope 316L SST (1.4404), 78.7 in. (2000 mm) long, Ø10 mm probe, Ø4 mm rope ★

02500-7000-0006 Extension: Rope 316L SST (1.4404), 78.7 in. (2000 mm) long, Ø10 mm probe, Ø8 mm rope ★

02500-1000-0109 Standard Ø4 mm rope, 316 SST (1.4401), not coated, price per 39.4 in, (1000 mm) ★

02500-1000-0110 Standard Ø4 mm rope, 316 SST (1.4401), coated, price per 39.4 in, (1000 mm) ★

02500-1000-0111 Weight Ø22 mm for 4 mm rope, 304/303 SST (1.4301/14305), including fixings ★

02500-1000-0112 Weight Ø22 mm for 4 mm rope, 316L SST (1.4404), including fixings ★

02500-1000-0113 Rope holder Ø22 mm for 4 mm rope, 304/303 SST (1.4301/14305), including fixings ★

02500-1000-0114 Rope holder Ø22 mm for 4 mm rope, 316L SST (1.4404), including fixings ★

02500-1000-0115 Medium Ø8 mm rope, 316 SST (1.4401), not coated, price per 39.4 in, (1000 mm) ★

02500-1000-0116 Weight Ø35 mm for 8 mm rope, 304/303 SST (1.4301/14305), including fixings ★

02500-1000-0117 Weight Ø35 mm for 8 mm rope, 316L SST (1.4404), including fixings ★

02500-1000-0118 Rope holder Ø22 mm for 8 mm rope, 304/303 SST (1.4301/14305), including fixings ★

02500-1000-0119 Rope holder Ø22 mm for 8 mm rope, 316L SST (1.4404), including fixings ★

02500-1000-0056 1 off M32 x 1½ mm hexagon nut (kit), 303 SST (1.4305), ★

02500-1000-0121 1 off ¾-in. BSPP hexagon nut (kit), 303 SST (1.4305) ★

02500-1000-0058 1 off 1-in. BSPP hexagon nut (kit), 303 SST (1.4305) ★

02500-1000-0060 1 off M30 x 1½ mm hexagon nut (kit), 303 SST (1.4305) ★

02500-1000-0063 1 off 1½ in. BSPP hexagon nut (kit), 303 SST (1.4305) ★

02500-1000-0064 1 off 1¼ in. BSPP hexagon nut (kit), 303 SST (1.4305) ★

02500-1000-0126 Weather protection for housing ★

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Table 3: Accessories

Part number Description

02500-7500-0003 Mounting kit 1 for DN100 PN6 and EN1092-1 flange with ø18 mm holes, containing:

4 off M16 x 60 mm screws (304-grade stainless steel) 4 off M16 nuts 4 off washers 1 off seal (non-food grade) for up to 464 °F (240 °C)

02500-7500-0006 Mounting kit 2 for DN100 PN6 and EN1092-1 flange with M16 threaded holes, containing:

4 off M16 x 40 mm screws (A2-grade stainless steel) 4 off M16 washers (A2-grade stainless steel) 1 off seal (non-food grade) for up to 464 °F (240 °C)

02500-7500-0009 Mounting kit 3 for DN100 PN16 and EN1092-1 flange with ø18 mm holes, containing:

8 off M16 x 60 mm screws (A2-grade stainless steel) 8 off M16 nuts (A2-grade stainless steel) 8 off M16 washers (A2-grade stainless steel) 1 off seal (non-food grade) for up to 464 °F (240 °C)

02500-7500-0012 Mounting kit 4 for DN100 PN16 and EN1092-1 flange with M16 threaded holes, containing:

8 off M16 x 40 mm screws (A2-grade stainless steel) 8 off M16 washers (A2-grade stainless steel) 1 off seal (non-food grade) for up to 464 °F (240 °C)

02500-7501-0001 Flat sealing gasket for 1-in. threaded process connection

Maximum operating temperature of 464 °F (240 °C)

★

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Rosemount 2555 January 2020

Specifications

Electrical data

Connection terminals

Cable entry

Signal output delay

Safety operation (FSL or FSH)

Operation frequency

Overvoltage category

Pollution degree

Electronics

Power supply

Maximum ripple of power supply

Maximum installed load

Signal output

Display

Status indication

Data storage

Isolation

Protection class

0.14 - 2.5 mm2 (AWG 26-14)

M20 × 1.5 screwed cable gland

½-in. NPT conduit connection

Clamping range (diameter) of the factory provided cable glands:

0.24 to 0.47-in. (6 to 12 mm) for M20 × 1.5

Configurable from 0.5 to 60 seconds.

Configurable switches for each signal output. Select Fail Safe High (FSH) or Fail Safe Low (FSL) depending on application.

100 kHz

2 (inside housing)

Universal voltage Relay DPDT

21 to 230 Vac (50/60 Hz) or Vdc ±10%

includes ±10% from EN 61010

7 Vss for dc supply

1.5 VA or 1.5 W

Floating relay DPDT

Maximum 250 Vac, 8 A (non-inductive) Maximum 30 Vdc, 5 A (non-inductive)

Four digit LCD Displays actual measured capacitance, signal output state, and self diagnostics Lowest operating temperature: -22 °F (-30 °C)

Tri-color built-in LED (according to NE44): Power on, signal output, failure/maintenance

Non-volatile EPROM for configuration settings and calibration data.

Power supply to signal output: 2225 Vrms Signal output to signal output: 2225 Vrms

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