FOXBORO FBM201e Analog Input (0 to 20 mA) Interface Modules

FOXBORO  FBM201e  Analog Input (0 to 20 mA) Interface Modules

The FBM201e Analog Input Interface Module provides eight dc current input channels.

FEATURES

Key features of the FBM201e module are:

Eight 0 to 20 mA dc channels for input of analog

sensor signals

Each analog input channel is galvanically isolated

from other channels and ground

Compact, rugged design suitable for enclosure in

Class G3 (harsh) environments

Execution of an analog input application program

that provides conversion time and configurable

options for integration time and Rate of Change

Limits

High accuracy achieved by sigma-delta data

conversions for each channel

Termination Assemblies (TAs) for locally or

remotely connecting field wiring to the FBM201e

Termination Assemblies for per channel internally

and/or externally loop powered transmitters.

OVERVIEW

Each FBM201e Analog Input Interface Module

contains eight analog input channels, each channel

accepting a 2-wire, dc input from an analog sensor

such as a 4 to 20 mA transmitter

The modules perform the signal conversion required

to interface the electrical input signals from the field

sensors to the optionally redundant fieldbus.

COMPACT DESIGN

The FBM201e module has a compact design, with a

rugged extruded aluminum exterior for physical

protection of the circuits. Enclosures specially

designed for mounting the FBMs provide various

levels of environmental protection, up to harsh

environments per ISA Standard S71.04.

HIGH ACCURACY

For high accuracy, the module incorporates sigma

delta data conversion on a per-channel basis, which

can provide a new analog input reading every 25 ms,

and a configurable integration period to remove any

process noise and power-line frequency noise.

Each time period, the FBM converts each analog

input to a digital value, averages these values over

the time period, and provides the averaged value to

the controller.

EASY REMOVAL/REPLACEMENT

The module can be removed/replaced without

removing field device termination cabling, power or

communications cabling.

VISUAL INDICATORS

Light-emitting diodes (LEDs) incorporated into the

front of the modules provide visual status indications

of Fieldbus Module (FBM) functions.

MODULAR BASEPLATE MOUNTING

The module mounts on a modular baseplate (see

Figure 1) which accommodates up to four or eight

FBMs. The modular baseplate is either DIN rail

mounted or rack mounted, and includes signal

connectors for redundant fieldbus, redundant

independent dc power, and termination cables.

FIELDBUS COMMUNICATION

A Fieldbus Communication Module or a Control

Processor interfaces the redundant 2 Mbps module

Fieldbus used by the FBMs. The FBM201e module

accepts communication from either path (A or B) of

the redundant 2 Mbps fieldbus – should one path fail

or be disabled at the system level, the module

continues communication over the active path.

TERMINATION ASSEMBLIES

Field I/O signals connect to the FBM subsystem via

DIN rail mounted TAs (see Figure 1). The TAs used

with the FBM201e module are described in

“TERMINATION ASSEMBLIES AND CABLES” on

page 7

FUNCTIONAL SPECIFICATIONS

Process I/O Communications

Communicates with its associated FCM or FCP via

the redundant 2 Mbps module Fieldbus.

Input Channels

8 isolated and independent channels

Input Range (each channel)

0 to 20 mA dc

Input Channels (8)

ANALOG ACCURACY (INCLUDES LINEARITY)

±0.02% of span

Accuracy temperature coefficient: ±50 ppm/ºC

FIELD DEVICE CABLING DISTANCE

Maximum distance of the field device from the

FBM is a function of compliance voltage @20 mA

(21.4 V dc), wire resistance, and voltage drop at

the field device.

Input Channel Isolation

Each channel is galvanically isolated from all other

channels and earth (ground). The module/TA

withstands, without damage, a potential of 600 V ac

applied for one minute between any channel and

ground, or between a given channel and any other

channel.

WARNING

This does not imply that these channels are

intended for permanent connection to

voltages of these levels. Exceeding the limits

for input voltages, as stated elsewhere in this

specification, violates electrical safety codes

and may expose users to electric shock.

Power Requirements

INPUT VOLTAGE RANGE (REDUNDANT)

INPUT CHANNEL IMPEDANCE

61.5 Ω nominal

INPUT SIGNAL A/D CONVERSION

Each channel performs A/D signal conversion

using an independent Sigma-Delta converter.

INTEGRATION PERIOD

Software configurable.

COMMON MODE REJECTION

>100 db at 50 or 60 Hz

NORMAL MODE REJECTION

>95 db at 50 or 60 Hz

LOOP SUPPLY

24 V dc ±2.5%

OUTPUT IMPEDANCE

68 Ω

LOOP POWER SUPPLY PROTECTION

Each channel is channel-to-channel galvanically

isolated, current limited, and voltage regulated.

All analog inputs are limited by their design to less

than 30 mA. If the current limit circuit shorted out,

the current is limited to about 100mA.

24 V dc +5%, -10%

CONSUMPTION

7 W (maximum)

HEAT DISSIPATION

3 W (maximum)

Calibration Requirements

Calibration of the module and termination assembly is

not required

FUNCTIONAL SPECIFICATIONS (CONTINUED)

Regulatory Compliance

ELECTROMAGNETIC COMPATIBILITY (EMC)

European EMC Directive 89/336/EEC

Meets: EN 50081-2 Emission standard

EN 50082-2 Immunity standard

EN 61326 Annex A (Industrial

Levels)

CISPR 11. Industrial Scientific and Medical

(ISM) Radio-frequency Equipment –

Electromagnetic Disturbance Characteristics – Limits and Methods of Measurement

Meets Class A Limits

IEC 61000-4-2 ESD Immunity

Contact 4 kV, air 8 kV

IEC 61000-4-3 Radiated Field Immunity

10 V/m at 80 to 1000 MHz

IEC 61000-4-4 Electrical Fast

Transient/Burst Immunity

2 kV on I/O, dc power and communication

lines

IEC 61000-4-5 Surge Immunity

2kV on ac and dc power lines; 1kV on I/O

and communications lines

IEC 61000-4-6 Immunity to Conducted

Disturbances Induced by Radio frequency

Fields

10 V (rms) at 150 kHz to 80 MHz on I/O,

dc power and communication lines

IEC 61000-4-8 Power Frequency Magnetic

Field Immunity

30 A/m at 50 and 60 Hz

PRODUCT SAFETY

Underwriters Laboratories (UL) for U.S. and

Canada

UL/UL-C listed as suitable for use in

UL/UL-C listed Class I, Groups A-D;

Division 2; temperature code T4 enclosure

based systems. These modules are also UL

and UL-C listed as associated apparatus for

supplying non-incendive communication

circuits for Class I, Groups A-D hazardous

locations when connected to specified

I/A Series® processor modules as described

in the I/A Series DIN Rail Mounted

Subsystem User’s Guide (B0400FA).

Communications circuits also meet the

requirements for Class 2 as defined in

Article 725 of the National Electrical Code

(NFPA No.70) and Section 16 of the

Canadian Electrical Code (CSA C22.1).

Conditions for use are as specified in the

I/A Series DIN Rail Mounted Subsystem

User’s Guide (B0400FA).

European Low Voltage Directive 73/23/EEC

and Explosive Atmospheres (ATEX) directive

94/9/EC

CENELEC (DEMKO) certified as

EEx nA [nL] IIC T4 for use in CENELEC

certified Zone 2 enclosure certified as

associated apparatus for supplying non

incendive field circuits for Zone 2. Group IIC,

potentially explosive atmospheres when

connected to specified I/A Series processor

modules as described in the I/A Series DIN

Rail Mounted Subsystem User’s Guide

(B0400FA). Also, see Table 1 on page 8

ENVIRONMENTAL SPECIFICATIONS(1)

Operating

TEMPERATURE

FBM201e-20 to +70°C (-4 to +158°F)

Termination Assembly-20 to +70°C (-4 to +158°F)

RELATIVE HUMIDITY

5 to 95% (noncondensing)

ALTITUDE-300 to +3.000 m (-1.000 to +10.000 ft)

Storage

TEMPERATURE-40 to +70°C (-40 to +158°F)

Mounting

FBM201e

The module mounts on a modular baseplate. The

baseplate can be mounted on a DIN rail

(horizontally or vertically), or horizontally on a

19-inch rack using a mounting kit. Refer to DIN

Rail Mounted Modular Baseplates (PSS 21H

2W6 B4) for details.

TERMINATION ASSEMBLY

The TA mounts on a DIN rail and accommodates

multiple DIN rail styles including 32 mm (1.26 in)

and 35 mm 1.38 in).

Mass

FBM201e

284 g (10 oz) approximate

TERMINATION ASSEMBLY

Compression

181 g (0.40 lb) approximate

Ring Lug

249 g (0.55 lb) approximate

RELATIVE HUMIDITY

5 to 95% (noncondensing).

ALTITUDE-300 to +12.000 m (-1.000 to +40.000 ft)

Contamination

Suitable for use in Class G3 (Harsh) environments as

defined in ISA Standard S71.04. based on exposure

testing according to EIA Standard 364-65. Class III.

Vibration

7.5 m/S2 (0.75 g) from 5 to 500 Hz

PHYSICAL SPECIFICATIONS

Dimensions – FBM201e

HEIGHT

102 mm (4 in)

114 mm (4.5 in) with mounting lugs

WIDTH

45 mm (1.75 in)

DEPTH

104 mm (4.11 in)

Dimensions – Termination Assembly

See page 10

Part Number

FBM201e

P0924TA

TERMINATION ASSEMBLIES

See “FUNCTIONAL SPECIFICATIONS –

TERMINATION ASSEMBLIES” on page 8

PHYSICAL SPECIFICATIONS (CONTINUED)

Termination Cables

CABLE LENGTHS

Up to 30 m (98 ft)

CABLE MATERIALS

Hypalon®/XLP

TERMINATION CABLE TYPE

Type 1 – See Table 2 on page 9

BASEPLATE TO MAIN TA CABLE CONNECTION

FBM Baseplate End

37-pin D-subminiature

Termination Assembly End

25-pin D-subminiature

Construction – Termination Assembly

MATERIAL

Polyamide (PA), compression

PA, ring lug

TERMINATION ASSEMBLIES AND CABLES

Field input signals connect to the FBM subsystem via

DIN rail mounted Termination Assemblies, which are

electrically passive (see Figure 1). TAs for the

FBM201e module are available in the following forms:

Compression screw type using Polyamide (PA)

material

Ring lug type using Polyamide (PA) material

See “FUNCTIONAL SPECIFICATIONS –

TERMINATION ASSEMBLIES” on page 8 for a list of

TAs used with the FBM201e module.

Field Termination Connections

COMPRESSION-TYPE ACCEPTED WIRING

SIZES

Solid/Stranded/AWG

0.2 to 4 mm2/0.2 to 2.5 mm2/24 to 12 AWG

Stranded with Ferrules

0.2 to 2.5 mm2 with or without plastic collar

RING-LUG TYPE ACCEPTED WIRING SIZES

#6 size connectors (0.375 in (9.5 mm))

0.5 to 4 mm2/22 AWG to 12 AWG

A removable termination cable connects the DIN rail

mounted TA to the FBM via a field connector on the

baseplate in which the FBM is installed. Termination

cables are available in Hypalon® XLP.

Termination cables are available in a variety of

lengths, up to 30 meters (98 feet), allowing the

Termination Assembly to be mounted in either the

enclosure or in an adjacent enclosure. See Table 2

for a list of termination cables used with the TAs for

the FBM201e module