Foxboro™ DCS

Field Mounted Intelligent Enclosure

PSS 41H-2I20
Product Specification

March 2024

https://www.se.com
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Overview Field Mounted Intelligent Enclosure

Overview
The EcoStruxure™ Foxboro™ DCS Field Mounted Intelligent Enclosure provides an
integrated solution designed to be mounted close to instruments in the field to reduce
cables. The Field Mounted Enclosure includes Universal Input/Output (UIO) modules,
power supplies, and Termination Assemblies (TAs) that are pre-installed and tested,
and can be connected to a wide range of field devices. The enclosure supports
Schneider Electric’s Flexible Lean Execution strategy, which shortens project
schedules and reduces the risk of startup delays.
The Field Mounted Intelligent Enclosure is designed to be mounted in the field, and
connects through redundant single mode fiber to the Field Control Processors located
in the Equipment Room Intelligent Enclosure. For more information, see Equipment
Room Intelligent Enclosure (PSS 41H-2I30).
The enclosure supports up to 64 standard Universal I/O channels in simplex,
redundant, or simplex and redundant combinations, and optionally accommodates
integration of third party PLCs using simplex or redundant Field Device System
Integration modules supporting Modbus TCP.
A second enclosure can be cascaded from the first enclosure using single mode fiber
or copper cable, saving on communication home run cable to the equipment room.
Field cables, communication cables, and power cables enter the enclosure through
cable glands or a multi-cable transit (optional) located at the bottom of the enclosure.
The channel-to-channel isolated Universal I/O Module supports DI, DO, AI, AO,
HART, NAMUR, Pulse, and 1 ms SOE signal types.
Field cables terminate directly on Termination Assemblies (TAs) with signal
conditioners for optional field signal processing. See Termination Assemblies and
Signal Conditioners, page 8.
Terminals are provided to terminate spare field cable cores and screens. This rugged,
unpainted SS316L stainless steel enclosure can be mounted in harsh environmental
and hazardous areas.

PSS 41H-2I20, Rev B 3

Field Mounted Intelligent Enclosure Features

Features
• Protection against harsh environments and hazardous locations:
◦ NEMA® 4X/IP66 rated
◦ Class G3 (harsh) environment
◦ ATEX
• Universal I/O and TAs support any one of these options:
◦ 64 Simplex I/O
◦ 64 Redundant I/O
◦ 48 Simplex and 16 Redundant I/O
• Up to 16 Universal Standard I/O modules (8 x FBM247, 16 x FBM248, or
4 x FBM248 and 6 x FBM247) that support 64 simplex, redundant, or simplex and
redundant I/O Channels using TAs and signal conditioners
• Redundant Field Communication Modules (FCM2F10) for single mode fiber
communication to FCP280
• Up to two Field Device System Integrator Standard modules
(1 x or 2 x FBM232, 2 x FBM233) for Modbus TCP Communication
• Daisy chain from one enclosure to the next to reduce home run cables for
communication and power. Alternatively, the power output used to daisy chain an
enclosure can be used to provide power to a wireless field device access point
installed outside of the enclosure
• Up to two Fieldbus Isolator/Repeator modules for daisy chaining enclosures
using Copper (FBI200) or Fiber Optic cable (FCM2F10)
• 12-port fiber optic patch panel with ST connectors for terminating and distributing
fiber-optic cables for communication to the enclosure and wireless field device
access point
• Document pocket inside front door
• Door stoppers to help prevent the door from swinging or opening too widely
• 120 VAC, 230 VAC system supply
• Supports the Intelligent Commissioning Wizard, which significantly reduces
commissioning effort and shortens the time to plant start-up (see Field Device
Expert for HART Devices (PSS 41S-10FDMHRT))

Environmental Protection
The enclosure provides NEMA4X/IP66 environmental protection, allowing it to be
used in harsh locations.

Thermal Protection
Heat from the equipment mounted within the enclosure is convected naturally and is
dissipated by the exterior surfaces of the enclosure. For operating in ambient
temperatures up to 55°C (131°F), natural convection is supplemented by two
redundant fans that circulate air within the sealed enclosure.
The fans and temperature within the enclosure are monitored by the Enclosure
Monitoring Unit (EMU) that provides a diagnostic alarm on fan deterioration or
enclosure over temperature.

4 PSS 41H-2I20, Rev B

Features Field Mounted Intelligent Enclosure

Leave a minimum of 150 mm (6 in) space between adjacent cabinets or a cabinet and
a wall, to allow the flow of air to cool the cabinet.

Cable Entry
Bottom cable entry for power, communication, and field cables is through customer
supplied cable glands that maintain the enclosure protection classification, or optional
factory fitted Multi Cable Transit (MCT).

Modular Baseplate Mounting

The enclosure contains two 8-position standard 200 Series modular baseplates for
Foxboro DCS Fieldbus Modules (FBMs), and two 2-position baseplates for the
FCM2F10s. These are mounted on two vertical DIN rails as shown in Enclosure
Options, page 6. The FBM baseplates include signal connectors for the FBMs,
redundant independent DC power connections, system cable connections, module
fieldbus connections, and time synchronization connections.
For more information on the modular baseplates, see Standard 200 Series
Baseplates (PSS 41H-2SBASPLT).

Field Termination Assemblies

Termination Assemblies (TAs) are installed on the DIN rails mounted at the sides of
the FBM baseplates. The Universal I/O modules are connected to the TAs with pre-
installed system cables.
The TAs are supplied with redundant 24 VDC, protected by fuses that are monitored
by the Fuse Monitoring Unit (FMU).
The enclosure is shipped with TAs fitted with passive feed-through signal conditioners
which you can replace with the signal conditioners listed in Termination Assemblies
and Signal Conditioners, page 8.

Power Distribution Architecture

The enclosure provides a redundant 24 V power system using two FPS480-24 power
supplies fed by independent sources. Power wiring is routed through the bottom of the
enclosure. The input power connects to the primary and secondary entry terminal
blocks for main and backup power.
Electrical fuses are monitored by the Fuse Monitoring Unit (FMU) and an open fuse
indication from the FMU is wired into the Enclosure Monitoring Unit (EMU) through the
Alarm Distribution Assembly.

Grounding
All enclosure structural elements are integrally grounded by the enclosure design to
meet the appropriate industry regulations and standards. The enclosure is equipped
with two instrument earth bars. It also has a protective connection point at the outside
bottom of the enclosure for customer grounding purposes. Field wiring shields can be

PSS 41H-2I20, Rev B 5

Field Mounted Intelligent Enclosure Features

terminated either to the Terminal Assemblies or to the instrument ground bus bar.
Spare signal wires and shields can be terminated either to the Terminal Assemblies or
to the instrument ground bus bar.

Enclosure Diagnostic Alarms

The EMU provides an alarm for power supply failure detection, fuse failure detection
via the FMU, door open, fan deterioration, and enclosure over temperature. The EMU
provides a composite diagnostic alarm from a graduated analog signal that indicates
individual alarms and is prewired to a Universal I/O module channel for indication and
alarm.

Enclosure Security
The enclosure can be physically locked with a customer-supplied padlock to provide
physical security. The enclosure is also fitted with a door open switch that is alarmed
via the Enclosure Monitoring Unit to alert plant personnel.

Enclosure Options
The enclosure can be configured with the following options:
• 120 VAC or 230 VAC supply
• Customer supplied cable glands or factory fitted Multi Cable Transit (MCT)
• Termination Assembly selection for IS, Non-IS, and manufacturer
• 64 simplex UIO points, 64 redundant UIO points, or 48 simplex and 16 redundant
UIO points
• Third party communications through FBM232 modules for simplex Ethernet or
FBM233 modules for redundant Ethernet
• Fiber-optic connection to the HDLC Fieldbus using FCM2F10 modules
• Extended twinaxial connection to the HDLC Fieldbus using FBI200 modules

6 PSS 41H-2I20, Rev B

Features Field Mounted Intelligent Enclosure

Figure 1 - Interior View of the Enclosure

A 24 VDC Power Distribution Assembly K Instrument Ground Bar

B Alarm Distribution Assembly Terminals L Baseplate 8-Position FBM
C Primary Power Supply M Instrument Ground Bar
D Enclosure Monitoring Unit N Cable Entry (Blank Gland Plate)
E Door Open Switch O Termination Assemblies (Phoenix Contact shown)
F Power Entry Terminal Blocks P Wire Tray, 50 mm x 50 mm x 403 mm (2 in x 2 in x 15.9 in)
G Secondary Power Supply Q Electro Static Discharge Bonding Point
H Fans for internal air circulation R Fiber-Optic Patch Panel
I Baseplate 2-Position FCM S Lock for Customer-Supplied Padlock
J Fuse Monitoring Unit

PSS 41H-2I20, Rev B 7

Field Mounted Intelligent Enclosure Features

Termination Assemblies and Signal Conditioners

The following tables list the Termination Assemblies and Signal Conditioners
supported. You can select them as required at the time of ordering the enclosure.

Table 1 - Supported Phoenix Termination Assemblies and Signal Conditioners

Part Phoenix Part Description

Number
Base Module - 2906595 VIPER base module
VIP/S/D25M/BASE 1-8/L/C/EX (Termination Assembly),
screw connection (p/n
2906595)
• Shipped with IOA
FEED-THRU/EX
(p/n 2906598)
• Replace with the
IOAs below, as
required
IOA AI/AO/BFI/DS/0.5A/EX 2906599 IOA, analog protection
with disconnects and test
points
IOA DI/DO/BFI/DS/1.0A/EX 2906600 IOA, digital protection
with disconnects and test
points
IOA REL 24V DO/BFI/3.0A/EX 2910153 IOA, 24 V DO relay
IOA REL 120V DO/BFI/3.0A/EX 2910154 IOA, 120 V DO relay
IOA REL 24V DI/BFI/1.0A/EX 2910155 IOA, 24 V DO relay
IOA REL 120V DI/1.0A/EX 2910157 IOA, 120 V DI relay
IOA REL 230V DO/BFI/NO/3.0A/EX 2910421 IOA, 230 V DO relay NO
contact
IOA REL 230V DO/BFI/NC/3.0A/EX 2910422 IOA, 230 V DO relay NC
contact
IOA REL 230V DI/1.0A/EX 2910423 IOA, 230 V DI relay

8 PSS 41H-2I20, Rev B

Functional Specifications Field Mounted Intelligent Enclosure

Functional Specifications
Enclosure SS316L stainless steel field enclosure
Input Power (Redundant) See Compact Power Supply - FPS480-24 (PSS 41H-2C480)
Maximum Dissipated Power 148 W
Maximum Input Power 480 W
Enclosure Over Temperature Alarm 70°C (158°F)
Setting
Regulatory Compliance, Electromagnetic
• EMC Directive 2014/30/EU:
Compatibility (EMC)
Meets: EN 61326-1:2013 and EN 61000-6-2:2005
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; Hazardous locations when installed as
described in I-Series Intelligent Enclosures Planning and
Installation Guide (B0700GX).
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 I-Series Intelligent
Enclosures Planning and Installation Guide (B0700GX).
• European Low Voltage Directive 2014/35/EU and Explosive
Atmospheres (ATEX) Directive 2014/34/EU:

II 3G Ex ic ec nC IIC T3 Gc

II 3 D Ex tc IIIC T60 °C Dc
certified when installed as described in I-Series Intelligent
Enclosures Planning and Installation Guide (B0700GX).
RoHS Compliance Complies with European RoHS Directive 2011/65/EU when FBM232
and FBM233 options are not fitted

PSS 41H-2I20, Rev B 9

Field Mounted Intelligent Enclosure Environmental Specifications

Environmental Specifications
Operating Storage
Temperature -20° to +55°C (-4° to +131°F) (External -40° to +70°C (-40° to +158°F)
Ambient)
Altitude -300 to +3,000 m (-1,000 to +10,000 ft) -300 to +12,000 m (-1,000 to +40,000 ft)
Relative Humidity 5 to 95% (noncondensing)
Ingress NEMA 4X, IP66 (per EN 60 529/IEC 529)
Protection
Ratings
Contamination Class G3 (Severe) as defined in ISA Standard, S71.04
Class
Enclosure Over 70° C (158° F)
Temperature
Alarm
Vibration • 2.0 to 13.2 Hz, 1.0 mm
• 13.2 to 100 Hz, 0.7 g
Sound Power 47.2 dB
Level (SWL)

10 PSS 41H-2I20, Rev B

Physical Specifications Field Mounted Intelligent Enclosure

Physical Specifications
Mounting Wall mounted

WARNING
POTENTIAL RISK OF INJURY
The enclosure must be securely mounted. See I-Series Intelligent Enclosures Planning
and Installation Guide (B0700GX) for instructions to mount the enclosure.
Failure to follow these instructions can result in death, serious injury, or equipment
damage.

Weight Up to 150 kg (up to 330 lbs)

Construction SS316L, Unpainted
Panel Thickness • Doors:
14 Gauge (1.8 mm)
• Housing:
14 Gauge (1.8 mm)
• Gland Plate:
16 Gauge (1.5 mm)
Field Termination See I-Series Intelligent Enclosures Planning and Installation Guide (B0700GX)
Connections
Field-Wire • Termination Assemblies:
Termination
Eight TAs with screw-clamp field connectors that support up to 14 Gauge (2.5 mm2)
• Wire Tray:
Two wire trays 50 mm x 50 mm x 403 mm (2 in x 2 in x 15.9 in) for routing of field cables
Ground Bus Bar • Two bus bars for instrument ground
• Separate connection point (stud) for protective ground
Power Input • Type:
Terminals
Screw Clamp
• Wire Size:
Up to 10 AWG (6 mm2)

PSS 41H-2I20, Rev B 11

Field Mounted Intelligent Enclosure Dimensions-Nominal

Dimensions-Nominal

12 PSS 41H-2I20, Rev B

Related Documents Field Mounted Intelligent Enclosure

Related Documents
• Compact Power Supply - FPS480-24 (PSS 41H-2C480)
• Environmental Conditions for Process Measurement and Control Systems:
Airborne Contaminants, ISA-S71.04-1985 (not Foxboro-supplied)
• Equipment Room Intelligent Enclosure (PSS 41H-2I30)
• FBI200 Fieldbus Isolator/Filter (PSS 41H-2FBI200)
• FBM232 Field Device System Integrator Module, 10/100 Mbps Ethernet, Single
(PSS 41H-2S232)
• FBM233 Field Device System Integrator Module, 10/100 Mbps Ethernet,
Redundant (PSS 41H-2S233)
• FBM247, Current/Voltage Analog/Digital/Pulse I/O Configurable Module (PSS
41H-2S247)
• FBM248, Current/Voltage Analog/Digital/Pulse I/O Configurable Module
(Redundant) (PSS 41H-2S248)
• Field Control Processor 280 (FCP280) (PSS 41H-1FCP280)
• Fieldbus Communications Module, FCM2F2/FCM2F4/FCM2F1 (PSS 41H-2FCM)
• I-Series Intelligent Enclosures Planning and Installation Guide (B0700GX)
• Standard 200 Series Baseplates (PSS 41H-2SBASPLT)
• Standard and Compact 200 Series I/O - Agency Certifications (PSS 41H-
2CERTS)

PSS 41H-2I20, Rev B 13

 WARNING: This product can
expose you to chemicals
including lead and lead
compounds, which are
known to the State of
California to cause cancer
and birth defects or other
reproductive harm. For more
information, go to
www.p65warnings.ca.gov/.

Schneider Electric Systems USA, Inc.

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Foxboro, Massachusetts 02035–2040
United States of America

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As standards, specifications, and design change from time to time,

please ask for confirmation of the information given in this publication.

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PSS 41H-2I20, Rev B