Crouse-hinds Mtl f300 User manual

F300 megablock range

MTL ﬁeldbus device couplers

July 2019

INM F300 rev 6

Instruction manual

MTL ﬁeldbus networks

DRAFT- 09 July 2019

ii INM F300 rev 6

DRAFT- 09 July 2019

Declaration of Conformity

A printed version of the Declaration of Conformity has been provided separately within the original shipment of

goods. However, you can ﬁnd a copy of the latest version at http://www.mtl-inst.com/certiﬁcates

iiiINM F300 rev 6

DRAFT- 09 July 2019 DRAFT- 09 July 2019

CONTENTS

DECLARATION OF CONFORMITY ......................................................II

GENERAL SAFETY INFORMATION....................................................IV

1 OVERVIEW ........................................................................1

2 DESCRIPTION ......................................................................1

3 COMPONENTS AND ACCESSORIES ...................................................2

4 MECHANICAL ......................................................................2

4.1 Mounting orientation .....................................................................2

4.2 Enclosure requirements...................................................................2

4.3 DIN-rail mounting........................................................................3

4.4 Removal from DIN-rail ....................................................................3

5 ELECTRICAL CONNECTIONS .........................................................3

5.1 DC Power Requirements ..................................................................4

5.2 Terminator ..............................................................................4

5.3 Trunk connections .......................................................................4

5.4 Spur port connections ....................................................................5

5.5 Cable screen connections .................................................................5

5.6 Surge protection.........................................................................5

6 TESTING ..........................................................................6

6.1 Power LED ..............................................................................6

6.2 Spur LEDs ..............................................................................6

7 ROUTINE MAINTENANCE ............................................................6

8 ATEX SAFETY INSTRUCTIONS ........................................................7

8.1 General ................................................................................7

8.2 Installation..............................................................................7

8.3 Inspection and maintenance ...............................................................7

8.4 Repair .................................................................................7

8.5 Marking ................................................................................8

9 FM CONTROL DRAWINGS ...........................................................9

10 IECEx SAFETY INSTRUCTIONS ......................................................11

10.1 Conditions of safe use ...................................................................11

10.2 IECEx Control drawings ...............................................................12-15

iv INM F300 rev 6

DRAFT- 09 July 2019

GENERAL SAFETY INFORMATION

The following methods are used in this manual to alert the user to important information:-

WARNING !

Warnings are provided to ensure operator safety and MUST be followed.

CAUTION

Cautions are provided to prevent damage to the instrument.

NOTE

These are used to give general information to ensure correct operation.

SAFETY INSTRUCTIONS FOR INSTALLATION AND OPERATING PERSONNEL

The operating instructions provided here contain essential safety instructions for installation personnel and

those engaged in the operation, maintenance and servicing of the equipment.

WARNING !

Failure to comply with these instructions can endanger the lives or health of personnel and risk damage

to the plant and the environment.

WARNING !

The responsibility for planning, installation, commissioning, operation and maintenance, particularly with

respect to applications in explosion-hazard areas, lies with the plant operator.

Before commencing installation or commissioning:

• Read and understand the contents of this manual and the product datasheet

• Ensure installation and operating personnel have received adequate training for this task

• Ensure that any operating instructions are fully understood by the personnel responsible.

• Observe national and local installation and mounting regulations (e.g. IEC 60079-14).

WARNING !

If these assemblies have been used previously in general electrical installations,

they MAY NOT be used in explosion-hazard area applications.

During operation:

• Make the relevant instructions available at all times to the operating personnel.

• Observe safety instructions.

• Observe national safety and accident prevention regulations.

• Operate the equipment within its published speciﬁcation.

• Servicing, maintenance work or repairs not described in this manual must not be performed without prior

agreement with the manufacturer.

• Any damage to this equipment may render its explosion protection null and void.

• No changes to any of the components that might impair their explosion protection are permitted.

If any information provided here is not clear:

• Contact Eaton’s MTL product line or one of its representatives.

NOTE

Improper installation and operation of the enclosure can result in the invalidation of the guarantee.

1INM F300 rev 6

DRAFT- 09 July 2019 DRAFT- 09 July 2019

1 OVERVIEW

F300 Megablocks are DIN-rail mounted, device couplers for Foundation™ ﬁeldbus

or Proﬁbus PA networks. They allow connection of ﬁeld devices to the segment

trunk cable and provide short-circuit protection to the segment.

Megablocks minimize hand wiring and allow individual devices to be added to

and removed from the segment without disrupting network communication.

Megablocks are available in four, eight, and twelve port versions. Multiple

Megablocks are easily wired together to allow larger segments to be constructed.

Each F300 Megablock includes an F97 Terminator for installation in the trunk

terminals, which is clearly marked with a large ‘T’ for easy identiﬁcation by ﬁeld

personnel.

Individual surge-protector modules (FS32) can also be ﬁtted to any of the

Megablock ﬁeldbus terminals to provide protection against induced surges and

transients that can potentially destroy or degrade certain components inside the

F300 Megablocks.

2 DESCRIPTION

Simple and reliable interconnection

Each Megablock has dedicated connections for the ﬁeldbus “home run” or trunk

cable. Trunk connections are identiﬁed by their black connectors. Numbered

(grey) connectors are provided for each spur.

Wiring connections to the Megablock are made using pluggable connectors

(screw terminal type are standard, but other connection styles are available).

These allow wire terminations to be made to the individual connectors, which are

then plugged into the Megablock. Devices can be connected and disconnected

easily during commissioning. On completion, the connector retaining screws are

tightened to secure each connector to the Megablock.

F300 megablock range

MTL Fieldbus device couplers

Figure 1.1 - Megablock models F312, F308 and F304

2INM F300 rev 6

DRAFT- 09 July 2019

Short-circuit protection

To minimize susceptibility to single points of failure, F300 Megablocks are provided

with built-in SpurGuard™ short-circuit protectors, which prevent the entire Fieldbus

segment from being pulled down in the event of a short circuit on any one of the

individual ﬁeld devices or spur cable runs.

NOTE

During a short circuit, the shorted spur draws more current than a normal

Fieldbus device - this must be taken into account in segment design.

Diagnostic aids

Each Megablock comes with a green LED to indicate whether DC Power is present,

and a red LED next to each numbered spur indicates when the spur is in short circuit.

3 COMPONENTS AND ACCESSORIES

Product part numbers and their descriptions are listed below.

Part Number Description

F304[-PC]* 4-way Megablock

F308[-PC]* 8-way Megablock

F312[-PC]* 12-way Megablock

F97 Terminator for F300 range of Megablocks

F300-A01-5 Trunk-spur partition – pack of 5

FS32 Spur surge protector module

F300-BAR-5 FS32 grounding bars for trunk - pack of 5

F304-BAR-10 FS32 grounding bars for F304 - pack of 10 †

F308-BAR-10 FS32 grounding bars for F308 - pack of 10 †

F312-BAR-10 FS32 grounding bars for F312 - pack of 10 †

* The standard connector for the Megablock is a pluggable screw terminal (elevator type).

Pluggable spring-clamp connectors rely on constant spring pressure to maintain contact with the

wire. To order Megablocks with pluggable spring-clamp connectors, add a –PC sufﬁx to the part

number (i.e. F304-PC).

† Up to two bars may be required for each Megablock.

4 MECHANICAL

4.1 Mounting orientation

Megablocks mount vertically or horizontally on 35mm DIN rail within a ﬁeld junction

box The use of DIN rail end stops are recommended to prevent sliding (especially for

vertical installations).

Eight, and twelve port Megablocks have areas on their body for labelling so that

segments can be easily identiﬁed according to plant standards.

4.2 Enclosure requirements

4.2.1 General requirements

Megablocks may be mounted in hazardous (classiﬁed) areas – see section 8. The

following conditions must also be satisﬁed to ensure safe and reliable operation.

a) Prevent any form of pollution that could compromise the operation of the unit.

For example, choose an unpolluted location or a suitable enclosure to protect the

assembly.

b) Provide an adequate level of mechanical protection. This can be achieved by

selecting a protected location, a suitable enclosure, or a combination of both.

c) Ensure that all cable entries and connections are secure by making provision for

3INM F300 rev 6

DRAFT- 09 July 2019 DRAFT- 09 July 2019

the careful routing and securing of all cables.

d) Provide adequate security against unauthorized interference.

4.2.2 Outdoor mounting

In addition to the General Requirements above, if the Megablock is mounted in an

outdoor location, use a suitable enclosure with a minimum of IP54 ingress protection.

A higher level of ingress protection rating will be necessary if the working atmosphere

is, or can be, corrosive, or if the enclosure is subject to wet or dusty environments.

4.3 DIN-rail mounting

The Megablocks are designed for mounting on 35mm x 7.5mm T-section “top hat” DIN

rail to EN50022 and use built-in DIN rail clips to attach to the rail.

4.3.1 Mounting procedure

Megablocks are attached to the DIN rail using a “push-and-tilt” method- as illustrated

on the body label and in Figure 4.1 below.

Tilt the Megablock towards the trunk-connector side of the Megablock and then

engage the DIN-rail clips under the ledge of the DIN rail. Push the Megablock against

the edge of the rail then rotate the Megablock until it sits ﬂat onto the DIN rail, then

release the pressure to allow the clips on the other side to engage.

1Remove

Install

Push

Figure 4.1: DIN Rail Installation and Removal

4.4 Removal from DIN-rail

Refering to Figure 4.1, push the Megablock against the edge of the DIN rail, tilt the

other side of the Megablock up and away from the DIN rail, then release the side

pressure to disengage the DIN rail clips from the DIN rail ledge.

5 ELECTRICAL CONNECTIONS

The Trunk and Spur connectors are pluggable (with securing screws) and available

in the standard screw-terminal version or a spring-clamp version. Megablocks with

spring clamp connectors have a –PC sufﬁx on the Megablock part number (-PC). See

Figures 5.1 and 5.2. The terminals can accept the following conductor sizes:

Type Conductor size

Screw terminals 0.14 to 2.5mm2

Spring clamp terminals (-PC) 0.20 to 2.5mm2

NOTE

A torque screwdriver set between 0.5 - 0.6Nm is recommended for tightening all

terminal screws.

e) Conform to the permitted ambient temperature range of –45°C to +70°C.

4INM F300 rev 6

DRAFT- 09 July 2019

Figure 5.3

F97 terminator

Figure 5.1: Screw Terminal Figure 5.2: Spring Clamp

NOTE

When wiring to spring-clamp terminals, use a screwdriver with a 3-4 mm blade to

depress the spring-clamp button before inserting the termination cable. See Figure 5.2.

5.1 DC Power Requirements

Megablocks draw DC power from the ﬁeldbus trunk segment they are connected

to. The minimum DC input voltage, and current required, vary with the Megablock

type. Refer to the F300 datasheet for exact current requirements. The maximum

input voltage is 32V DC, but a lower voltage may be required in order to achieve safety

in some hazardous area applications- refer to the Control Drawings in Sections 9 & 10

of this manual.

5.2 Terminator

A terminator (Model No. F97) is provided with each

F300 Megablock. The terminator should be installed on

the trunk of the last Megablock in order to correctly

terminate the bus. The terminator is placed in the

second set of terminals on the trunk connector.

For spring clamp terminals, push the terminator ﬁrmly into

place. Take care to orientate the terminator so that the “T–F97” molded logo is facing

inwards towards the body of the Megablock, otherwise difﬁculty will be experienced

in accessing the spring-clamp buttons to remove it. For screw terminals, loosen the

screws, insert the terminator so that the molded logo is visible and then tighten the

screws. The F97 terminator has no speciﬁc polarity but inserting it with the ‘T’ visible

clearly identiﬁes the component, and its purpose.

When not in use, the F97 should be stored in the convenient storage slot provided in

the F300 body close to the trunk connection (Figure 1.1 shows it mounted this way on

the F304 model).

5.3 Trunk connections

Each trunk connector provides two sets of interlinked (+), (–) and cable screen (S)

connections.

The second connection enables the user to onward connect the trunk to a further

Megablock and avoids breaking the connection if an “upstream” Megablock needs to

be removed.

The second connection can also be used, as mentioned above, to install the F97

terminator if it is the last Megablock on the segment. See Section 5.5 for information

on cable screen grounding.

WARNING !

It is not permitted to connect or disconnect the trunk wiring in a hazardous

area without a gas clearance certificate or unless the circuit to which it is

connected has been de-energised.

5INM F300 rev 6

DRAFT- 09 July 2019 DRAFT- 09 July 2019

5.3.1 Ex nA [ic] applications

When the equipment is installed in an Ex nA [ic] application, a trunk-spur partition*

must be installed to segregate the trunk and spur wiring- see Figures 5.4 and 5.5.

* available in packs of ﬁve as Part No. F300-A01-5

Partition

Terminator

Trunk

terminal

Figure 5.4: Trunk-Spur partition

installation

Figure 5.5: Trunk-Spur partition in

position

Position the partition as shown in Figure 5.4 and locate the ﬁngers into the channels

on the sides of the device body. Press the partition onto the body until the ﬁngers

click into place at the bottom of the case- see Figure 5.5. The channels have different

sizes so the partition cannot be installed backwards.

5.4 Spur port connections

Each spur port connector provides (+), (–) and cable screen (S) connections. See

section 5.5 for information on cable screen grounding.

Cable screen connections

The ‘S’ screen terminals for the trunk and the spurs are interconnected/commoned within

the F3xx device and should be grounded at only one point for the whole segment (i.e. a

single-point ground). The recommended position for that connection is in the control room

close to the power supply at the DCS, or else in accordance with local system practice.

5.5 Surge protection

Each ﬁeldbus terminal, trunk or spur, on a Megablock can be ﬁtted with an FS32 surge

protector to prevent damage to the internal components. The FS32 uses the same

pluggable connector as the ﬁeld connector; so the ﬁeld connector is removed, the

FS32 inserted and the original ﬁeld connector is ﬁtted to the FS32. See Figure 5.6 &

5.7.

Trunk - F300-BAR Spur - F312-BAR M4 ground screw locations

Figure 5.6: Typical grounding bars Figure 5.7: With some FS32 modules

6INM F300 rev 6

DRAFT- 09 July 2019

Mounting brackets, known as “grounding bars”, can be ﬁtted into ready moulded

positions on both sides of the Megablock. (Grounding bar types are chosen to suit the

model - see page 2.) The FS32 has a central mounting screw to provide a mechanical

and electrical connection to the grounding bar. The bar must then be wired to a low-

impedance, protective local ground point in order to dissipate any induced surge currents.

NOTE

If a trunk-spur partition is to be fitted (Section 5.3.1), install it before mounting the

FS32 modules adjacent to it.

To mount FS32 surge protection modules on a Megablock:

1. Remove and retain the pluggable terminals from one side of the Megablock.

2. Locate the grounding bar lugs in the moulded positions on the side of the

Megablock and press it ﬁrmly into place- see Figure 5.6.

3. Repeat 1 and 2 for the other side of the Megablock, if required.

4. Use an M4 screw and ring terminal to connect each grounding bar to a suitable

low-impedance ground point- see Figure 5.7.

5. Mount an FS32 into one of the empty sockets and tighten its two plug screws,

then tighten the grounding screw into the mounting bar.

6. Insert one of the pluggable terminals into the FS32 and tighten its securing screws.

7. Repeat 5 and 6 for all the other FS32 modules.

A separate grounding bar (F300-BAR) is used for the trunk connector, which must be

similarly connected to ground- see Figures 5.6 & 5.7 Follow a similar procedure to the

one above for the trunk circuit.

NOTE

The FS32 surge protector is not certifed for installation in a Zone 2 hazardous area

and should be used only in applications where the Megablock is installed in a safe

(non-hazardous) area. Consult Eaton’s MTL product line for information on surge

protection in Zone 2 hazardous areas.

6 TESTING

6.1 Power LED

Each Megablock has a green power LED (labelled PWR). This LED lights when the

segment DC voltage exceeds 10V to indicate power is present.

6.2 Spur LEDs

A red LED is located next to each Megablock spur port. The LED lights when the

SpurGuard™ current-limiting function is activated by a short-circuit on the spur.

7 ROUTINE MAINTENANCE

Check the general condition of the installation periodically to make sure that no

deterioration has occurred. At least every twoyears (and more frequently for particularly

harsh environments) check that:

• cable, wire connections, terminations, and screens are in good condition

• the green Power LED is lit

• no red spur LEDs are lit

• no signs of damage or corrosion are present

WARNING !

The plastic parts can store static charge. Clean only with a damp cloth to

prevent static buildup.

7INM F300 rev 6

DRAFT- 09 July 2019 DRAFT- 09 July 2019

8 ATEX SAFETY INSTRUCTIONS

The following information is in accordance with the Essential Health and Safety

Requirements (Annex II) of the EU Directive 2014/34/EU [the ATEX Directive- safety of

apparatus] and is provided for those locations where the ATEX Directive is applicable.

8.1 General

a) This equipment must only be installed, operated and maintained by competent

personnel. Such personnel shall have undergone training, which included instruction

on the various types of protection and installation practices, the relevant rules

and regulations, and on the general principles of area classiﬁcation. Appropriate

refresher training shall be given on a regular basis. [See clause 4.2 of EN 60079-17].

b) This equipment has been designed to provide protection against all the relevant

additional hazards referred to in Annex II of the directive, such as those in clause 1.2.7.

c) This equipment has been designed to meet the requirements of EN 60079-15.

8.2 Installation

a) The installation must comply with the appropriate European, national and local

regulations, which may include reference to the code of practice EN 60079-14. In

addition, particular industries or end users may have speciﬁc requirements relating

to the safety of their installations and these requirements should also be met. For

the majority of installations the Directive 1999/92/EC [the ATEX Directive- safety of

installations] is also applicable.

b) This apparatus may be installed in a safe area and also in a Zone 2 location

providing that the relevant installation conditions are met. When mounted in a

Zone 2 location the apparatus must be provided with an enclosure, which offers an

additional degree of protection appropriate to the area classiﬁcation.

c) Unless already protected by design, this equipment must be protected by a

suitable enclosure against:

i) mechanical and thermal stresses in excess of those noted in the certiﬁcation

documentation and the product speciﬁcation

ii) aggressive substances, excessive dust, moisture and other contaminants.

Read also the Special Conditions for Safe Use (below) for any additional or more

speciﬁc information.

Special Conditions of Safe Use for Zone 2 applications

Ex nA IIC T4 Gc and Ex nA [ic] IIC T4 Gc

1. The apparatus is to be installed in an enclosure which maintains a minimum

ingress protection rating of IP54 and meets the enclosure requirements of EN

60079-0, EN 60079-11 and EN 60079-15.

2. Provisions shall be made externally to the apparatus to prevent the rated input

being exceeded by transient disturbances of more than 140% of the rated voltage.

See footnote.

FISCO Ex ic IIC T4 Gc

1. The apparatus is to be installed in an enclosure which maintains a minimum

ingress protection rating of IP54 and meets the enclosure requirements of

EN 60079-0 and EN 60079-11.

Note: All MTL ﬁeldbus power supplies are designed to protect the ﬁeldbus trunk from transient

disturbances on the DC power feed and will meet the requirements of maintaining transient

disturbances below 140% of the rated voltage.

8INM F300 rev 6

DRAFT- 09 July 2019

8.3 Inspection and maintenance

a) Inspection and maintenance should be carried out in accordance with European,

national and local regulations which may refer to the standard EN 60079-17. In

addition speciﬁc industries or end users may have speciﬁc requirements which

should also be met.

b) Access to the internal circuitry must not be made during operation.

8.4 Repair

This product cannot be repaired by the user and must be replaced with an equivalent

certiﬁed product.

NOTE: All MTL ﬁeldbus power supplies are designed to protect the ﬁeldbus trunk from

transient disturbances on the DC power feed and will meet the requirements of maintaining

transient disturbances below 140% of the rated voltage.

8.5 Marking

Each device is marked in compliance with the Directive.

This information applies to products manufactured during or after the year 2011.

Typical certiﬁcation marking

For F3xx

For F3xx-V2

NOTE

For details of FM and IECEx approvals see Sections 9 & 10.

9INM F300 rev 6

DRAFT- 09 July 2019 DRAFT- 09 July 2019

9 FM CONTROL DRAWINGS

FIELDBUS POWER SUPPLY

Vout (max) ≤24V Gas Groups A, B (IIC)

Vout (max) ≤32V Gas Groups C,D (IIB, IIA)

Iout (max) ≤2A

Must meet Ex n requirements for

Ex nA [nL] installations.

+ -

24VDC Power

Source (typical)

Host Connection (typical)

NON-HAZARDOUS LOCATION

Shield is grounded for reasons other than Electrical Safety

Class I Div 2 ABCD T4 -50°C ≤Tamb ≤70°C

Class I Zone 2 IIC T4 (US only)

Ex nA [nL] IIC T4 (Canada only) Field wiring shall be rated for 70C

HAZARDOUS (CLASSIFIED) LOCATION

Black Trunk

Connections

Gray Spur Outputs are energy limited (Non-

incendive Field Wiring) and may be live worked

without gas clearance where allowed by local

code.

To support live working of the devices

connected to the gray spurs, the following

criteria must be met:

Device must have entity parameters with

a maximum input voltage greater than or

equal to Voc of the Megablock.

Ca≤Ci+ Ccable

La≤Li+ Lcable

F3xx Megablock

Terminator

F97

Vmax=32V

Imax = 2A

+S-

Megablock™ Part Numbers:

F3xx[-V2][-T][-PC][-PD]

xx – indicates the number of spurs (04, 08, 12, or 16)

-V2 – option for no over-voltage protection

-T – option for a built-in terminator

-PC – option for pluggable spring clamp connectors

-PD – option for pluggable insulation displacement

connectors

Standard connectors are Pluggable Screw Terminal type.

The F97 is not used if the F3xx contains an internal

Terminator (-T part number suffix).

FM CONTROL DRAWING FOR F3XX

MEGABLOCK™ SERIES FIELDBUS

CONNECTION BLOCKS

CID2, Zone 2 INSTALLATIONS

Doc. No. 502-484 Rev. C.0

Sheet 1 of 2

2221 Yew Street, Forest Grove, Oregon 97116 USA

F3xx Megablock™

Fieldbus Connection Block

(F308, 8-spur series shown)

Gray spur connections are

Current limited to 53.5mA (nominal)

Vmax= 24V Gas Groups A, B (IIC)

Vmax= 32V Gas Groups C, D (IIB, IIA)

Imax = 2A

Voc = Vmax power supply

Isc = 56mA

Ci= Li= 0,

Po= 1.344W Gas Groups A, B (IIC)

Po= 1.792W Gas Groups C, D (IIB, IIA)

- +

+S-

Fusing of the power

source is recommended

If the Fieldbus Power Supply is suitably rated, it may be installed in the Hazardous Area.

Installation must be in accordance with the National Electrical Code

(NFPA 70, Article 504), ANSI/ISA-RP12.6, and CEC Part 1, or any

other applicable local electrical requirements.

The plastic parts can store static charge. Clean only with a damp

cloth to prevent static buildup.

Wire Requirements:

Connector Type AWG Torque

Screw Terminal 22-14 0.5-0.6Nm

Spring Clamp 24-12 NA

Insulation Displacement 20-18 NA

WARNING – EXPLOSION HAZARD. DO NOT DISCONNECT EQUIPMENT WHEN

A FLAMMABLE OR COMBUSTIBLE ATMOSPHERE IS PRESENT

(except gray spurs)

Gas Groups A, B (IIC) C (IIB) D (IIA)

Ca 80nF 80nF 80nF

La 0.15mH 0.26mH 0.26mH

Galvanic isolation in accordance with IEC61010 provided by Power Source or Power Supply.

Approved by: Cyrus Kelly Date: 10 FEB 2017

Gray Spur (Fieldbus Device) Connections

10 INM F300 rev 6

DRAFT- 09 July 2019

2221 Yew Street, Forest Grove, Oregon 97116 USA

F3XX MEGABLOCK™ SERIES

INSTALLATION INSTRUCTIONS

Approved by: Cyrus Kelly

Doc. No. 502-484 Rev. C.0

Sheet 2 of 2

Installing the Partition, Terminator, and Connector

Partition, Terminator, and Connector Installed

Date: 10 FEB 2017

Partition Installation

Connector Installation

The Partition must be installed for Ex nA [ic] applications. Orient the partition as shown

above and press down as indicated by the arrow. The ‘fingers’ will slide in the two

channels on each side of the F3xx until they latch in place at the bottom of the case. The

channels are sized differently so the Partition cannot be installed backwards.

If needed the F97 Terminator is installed in the Black Dual Pluggable connector as

shown above. Insert it into the connector and tighten the screws.

The connectors are installed as shown in the diagram above. Fully insert them into

the mating connector on the F3xx. Secure the two retaining screws to prevent the

connector from unexpectedly dislodging.

Terminator Installation

DIN Rail Mounting

F3xx Megablocks are designed to be mounted on 35

mm DIN rail using the clip mechanism on the back of

each unit. Mounting can be vertical or horizontal. Use

of DIN rail end stops is recommended.

Push

Remove

Install

Special Conditions of Safe Use

The apparatus shall be installed in an enclosure which maintains an ingress

protection rating of IP54 and meets the enclosure requirements of E60079-0

and E60079-15.

The apparatus shall be installed in an enclosure meeting the requirements of

ANSI/ISA 61010-1 (82.02.01) and CSA Standard C22.2 No 61010-1.

The apparatus shall be installed in compliance with the enclosure, mounting,

spacing and segregation requirements of the ultimate application.

Provisions shall be made externally to the F3XX to prevent the rated input being

exceeded by transient disturbances of more than 140% of the rated voltage.

Relcom Inc. Forest Grove, OR USA

NI Class I Div 2 ABCD T4

Install per document 502-484

NI Class I Zone 2 IIC T4 (US only)

Ex nA [nL] IIC T4 (Canada only)

Certification Markings

Repair and Maintenance

No regular maintenance is required for these products. There are also no user serviceable

parts in this product. Contact the distributor or factory for any product issues.

11INM F300 rev 6

DRAFT- 09 July 2019 DRAFT- 09 July 2019

10 IECEx SAFETY INSTRUCTIONS

10.1 Conditions of safe use

Ex nA IIC T4 Gc and Ex nA [ic] IIC T4 Gc

1. The apparatus is to be installed in an enclosure which maintains a minimum

ingress protection rating of IP54 and meets the enclosure requirements of IEC

60079-0, IEC 60079-11 and IEC 60079-15.

2. Provisions shall be made externally to the apparatus to prevent the rated input

being exceeded by transient disturbances of more than 140% of the rated voltage.

See footnote.

FISCO Ex ic IIC T4 Gc

1. The apparatus is to be installed in an enclosure which maintains a minimum

ingress protection rating of IP54 and meets the enclosure requirements of IEC

60079-0 and IEC 60079-11.

Note: All MTL ﬁeldbus power supplies are designed to protect the ﬁeldbus trunk from transient

disturbances on the DC power feed and will meet the requirements of maintaining transient

disturbances below 140% of the rated voltage.

12 INM F300 rev 6

DRAFT- 09 July 2019

10.2 IECEx Control drawings

FIELDBUS POWER SUPPLY

Uo≤32V

Io≤2A

Install according to power supply

instructions to ensure maximum voltage

and current output is not exceeded.

+ -

24VDC Power

Source (typical)

Host Connection (typical)

NON-HAZARDOUS LOCATION

Shield is grounded for reasons other than Electrical Safety

Ex nA IIC T4 -50°C ≤Tamb ≤70°C

HAZARDOUS (CLASSIFIED) LOCATION

Black Trunk

Connections

F97

Ui=32V

Ii = 2A

+S-

Approved by: Cyrus Kelly

Doc. No. 502-485 Rev. E.0

2221 Yew Street, Forest Grove, Oregon 97116 USA

F3xx Megablock™

Fieldbus Connection Block

(F308, 8-spur series shown)

Gray spur connections are

Current limited to 53.5mA (nominal)

Ui=32V

Ii= 2A

- +

+S-

Fusing of the power

source is recommended

Installation must be in

accordance with any

applicable local

electrical requirements.

WARNING – EXPLOSION HAZARD. DO NOT DISCONNECT

EQUIPMENT WHEN A FLAMMABLE OR COMBUSTIBLE

ATMOSPHERE IS PRESENT

CONTROL DRAWING FOR F3XX

MEGABLOCK™ SERIES FIELDBUS

CONNECTION BLOCKS

IECEx Ex nA INSTALLATIONS

Galvanic isolation in accordance with IEC 61010 provided by Power Source or Power Supply.

Sheet 1 of 4

If the Fieldbus Power Supply is protected by a type of protection listed in IEC 60079-0, it

may be installed in the Hazardous Area.

Megablock™ Part Numbers:

F3xx[-V2][-T][-PC][-PD]

xx – indicates the number of spurs (04, 08, 12, or 16)

-V2 – option for no over-voltage protection

-T – option for a built-in terminator

-PC – option for pluggable spring clamp connectors

-PD – option for pluggable insulation displacement

connectors

Standard connectors are Pluggable Screw Terminal type.

The F97 is not used if the F3xx contains an internal

Terminator (-T part number suffix).

Wire Requirements:

Connector Type AWG Torque

Screw Terminal 22-14 0.5-0.6Nm

Spring Clamp 24-12 NA

Insulation Displacement 20-18 NA

F3xx Megablock

Terminator

Gray Spur (Fieldbus Device) Connections

Special Conditions of Safe Use

The F3xx Megablock is to be installed in an enclosure which maintains a

minimum ingress protection rating of IP54 and meets the enclosure

requirements of IEC60079-0 and IEC60079-15.

Provisions shall be made externally to the F3xx to prevent the rated input being

exceeded by transient disturbances of more than 140% of the rated voltage.

Date: 10 FEB 2017

Agency drawing changes not

allowed without prior written

permission from Agency.

13INM F300 rev 6

DRAFT- 09 July 2019 DRAFT- 09 July 2019

FIELDBUS POWER SUPPLY

Uo≤24V (IIC)

Uo≤32V (IIB, IIA)

Io≤2A

Install according to power supply

instructions to ensure maximum voltage

and current output is not exceeded.

+ -

24VDC Power

Source (typical)

Host Connection (typical)

NON-HAZARDOUS LOCATION

Shield is grounded for reasons other than Electrical Safety

Ex nA [ic] IIC T4 -50°C ≤Tamb ≤70°C

HAZARDOUS (CLASSIFIED) LOCATION

Black Trunk

Connections

Ex ic (FISCO) Gray Spur Outputs:

Cable ≤60m

Cable Resistance Rc: 15-150ohms/km

Cable Capacitance Cc: 45-200nF/km

Cable Inductance Lc: 0.4-1.0mH/km

Fieldbus device FISCO certified in

accordance with IEC 60079-27.

Uoof Fieldbus Power Supply ≤17.5V

Installation to comply with IEC 60079-27.

Ex ic (Entity) Gray Spur Outputs:

Co> Ci+ Ccable

Lo> Li+ Lcable

Fieldbus device ‘Ex i' rated to meet Uoof

Megablock and have entity parameters.

F97

Ui=32V

Ii = 2A

+S-

Approved by: Cyrus Kelly

Doc. No. 502-485 Rev. E.0

2221 Yew Street, Forest Grove, Oregon 97116 USA

F3xx Megablock™

Fieldbus Connection Block

(F308, 8-spur series shown)

Gray spur connections are

Current limited to 53.5mA (nominal)

Ui=24V (IIC), Ui=32V (IIB, IIA)

Ii= 2A, Ci=0, Li=0

Uo = Megablock input voltage. The apparatus

supplying the input voltage must provide voltage

limiting meeting IEC 60079-11 requirements.

Io= 56mA

Po= 1.344W (IIC), Po= 1.792W (IIB, IIA)

- +

+S-

Fusing of the power

source is recommended

Installation must be in

accordance with any

applicable local

electrical requirements.

WARNING – EXPLOSION HAZARD. DO NOT DISCONNECT

EQUIPMENT WHEN A FLAMMABLE OR COMBUSTIBLE

ATMOSPHERE IS PRESENT

(except gray spurs).

Gas Groups IIC IIB IIA

Co80nF 80nF 80nF

Lo0.15mH 0.26mH 0.26mH

CONTROL DRAWING FOR F3XX

MEGABLOCK™ SERIES FIELDBUS

CONNECTION BLOCKS

IECEx Ex nA [ic] INSTALLATIONS

SEPARATOR MUST BE

INSTALLED BETWEEN BLACK

AND GRAY CONNECTORS TO

SUPPORT [ic] RATING

Galvanic isolation in accordance with IEC 61010 provided by Power Source or Power Supply.

Sheet 2 of 4

If the Fieldbus Power Supply is protected by a type of protection listed in IEC 60079-0, it

may be installed in the Hazardous Area.

Megablock™ Part Numbers:

F3xx[-T][-PC][-PD]

xx – indicates the number of spurs (04, 08, 12, or 16)

-T – option for a built-in terminator

-PC – option for pluggable spring clamp connectors

-PD – option for pluggable insulation displacement

connectors

Standard connectors are Pluggable Screw Terminal type.

The F97 is not used if the F3xx contains an internal

Terminator (-T part number suffix).

Wire Requirements:

Connector Type AWG Torque

Screw Terminal 22-14 0.5-0.6Nm

Spring Clamp 24-12 NA

Insulation Displacement 20-18 NA

F3xx Megablock

Terminator

Gray Spur (Fieldbus Device) Connections

Special Conditions of Safe Use

The F3xx Megablock is to be installed in an enclosure which maintains a

minimum ingress protection rating of IP54 and meets the enclosure

requirements of IEC60079-0, IEC60079-11 and IEC60079-15.

Provisions shall be made externally to the F3xx to prevent the rated input being

exceeded by transient disturbances of more than 140% of the rated voltage.

Date: 10 FEB 2017

Agency drawing changes not

allowed without prior written

permission from Agency.

14 INM F300 rev 6

DRAFT- 09 July 2019

Ex ic FISCO FIELDBUS POWER SUPPLY

Complies with IEC 60079-27

+ -

24VDC Power

Source (typical)

Host Connection (typical)

NON-HAZARDOUS LOCATION

Shield is grounded for reasons other than Electrical Safety

HAZARDOUS (CLASSIFIED) LOCATION

Black Trunk

Connections

Gray Spur Connections

Gray Spur Connections F3xx Megablock

Terminator

F97

+S-

2221 Yew Street, Forest Grove, Oregon 97116 USA

F3xx Megablock™

Fieldbus Connection Block

(F308, 8-spur series shown)

Gray spur connections are

Current limited to 53.5mA (nominal)

Ci=0, Li=0

- +

+S-

Fusing of the power

source is recommended

If the Fieldbus Power Supply is protected by a type of protection listed in IEC 60079-0, it

may be installed in the Hazardous Area.

CONTROL DRAWING FOR F3XX

MEGABLOCK™ SERIES FIELDBUS

CONNECTION BLOCKS

IECEx Ex ic INSTALLATIONS

Cable resistance, Rc:

Cable inductance, Lc:

Max. Segment length:

Maximum Spur length:

15 – 150 ohms/km

0.4 – 1.0 mH/km

1 km for IIC; 5 km for IIB (Note 1)

60m

Cable capacitance, Cc: 45-200nF/km

Note 1: Limited to 1.9 km by IEC61158-2.

Approved by: Cyrus Kelly Date: 10 FEB 2017

Doc. No. 502-485 Rev. E.0

Device Inductance: 0 – 10µH

Device Capacitance: 0 – 5nF

FISCO ic (FNICO) Installation Requirements

Sheet 3 of 4

Installation to comply with IEC 60079-27

Installation must be in

accordance with any applicable

local electrical requirements.

Wire Requirements:

Connector Type AWG Torque

Screw Terminal 22-14 0.5-0.6Nm

Spring Clamp 24-12 NA

Insulation Displacement 20-18 NA

Ex ic IIC T4 Gc FISCO -50°C ≤Tamb ≤70°C

Special Conditions of Safe Use

The F3xx Megablock is to be installed in an enclosure which maintains a

minimum ingress protection rating of IP54 and meets the enclosure

requirements of IEC60079-0 and IEC60079-11

Warning: The plastic parts can store

static charge. Clean only with a damp

cloth to prevent static buildup.

Agency drawing changes not

allowed without prior written

permission from Agency.

Megablock™ Part Numbers:

F3xx[-V2][-T][-PC][-PD]

xx – indicates the number of spurs (04, 08, 12, or 16)

-V2 – option for no over-voltage protection

-T – option for a built-in terminator

-PC – option for pluggable spring clamp connectors

-PD – option for pluggable insulation displacement

connectors

Standard connectors are Pluggable Screw Terminal type.

The F97 is not used if the F3xx contains an internal

Terminator (-T part number suffix).

15INM F300 rev 6

DRAFT- 09 July 2019 DRAFT- 09 July 2019

2221 Yew Street, Forest Grove, Oregon 97116 USA

F3XX MEGABLOCK™ SERIES

INSTALLATION INSTRUCTIONS

Approved by: Cyrus Kelly

Doc. No. 502-485 Rev. E.0

Sheet 4 of 4

Installing the Partition, Terminator, and Connector

Partition, Terminator, and Connector Installed

Repair and Maintenance

No maintenance is required for

these products. There are also

no user serviceable parts in

these products. Contact the

distributor or factory for any

product issues.

F3xx and F97 IECEx FMG 11.0017 X

Install per Doc. No. 502-485

Ex nA IIC T4 Gc

Ex nA [ic] IIC T4 Gc

Ex ic IIC T4 Gc FISCO

-50C<Tamb<70C

Certification Markings – F3xxPartition Installation