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FOXBORO FCM2F4 Fieldbus Communications Module

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FOXBORO / FIELD COMMUNICATIONS

FCM2F4

Fieldbus Communications Module

Fiber-optic extension for the Module Fieldbus, intended for baseplate-to-baseplate connections in Foxboro 200 Series architectures.

SERIES

FCM2F2 · FCM2F4 · FCM2F10

PERFORMANCE SNAPSHOT

4 km

Max. fiber distance

2 Mb

HDLC Fieldbus

MMF

Fiber interface

Why FCM2F4?

It occupies the middle range of the FCM2F family, providing a 4 km optical extension while FCM2F2 provides 2 km and FCM2F10 provides 10 km.

Configuration: redundant or non-redundant arrangements can be used according to system architecture.

QUICK CONTACT

Source FCM2F4

Tell us the required quantity and system configuration.

✉ Email: sales@amikon.cn ☎ WhatsApp: 86-18020776792

Sales Manager: Miya zheng

4 km optical extension
Compact 200 Series architecture

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Product Details

FOXBORO FCM2F4

Overview Inquiry Features Specifications Series FAQ More Models

FIELDBUS COMMUNICATIONS / 200 SERIES

FCM2F4

A fiber optic Fieldbus Communications Module designed to extend the 200 Series Module Fieldbus between baseplates. FCM2F4 supports a nominal maximum baseplate-to-baseplate fiber optic distance of 4 km (2.48 mi), making it suitable for remote I/O placement where longer copper runs, electrical noise, or ground-potential differences are concerns.

TYPE	Fieldbus Communications Module
FIBER LINK	Up to 4 km
FAMILY	FCM2F Series
PLATFORM	200 Series

Overview

The Foxboro FCM2F4 is a Fieldbus Communications Module used as a fiber optic extension between 200 Series baseplates. It allows Fieldbus Modules to be positioned closer to the process while the associated baseplates can be separated over a longer physical distance.

The fiber link provides electrical isolation and is not affected by common electrical disturbances such as EMI, RFI and lightning. This makes the architecture particularly useful around rotating equipment, arc-welding areas, high-voltage cable routes and installations where ground-loop or voltage-difference problems may be difficult to avoid.

FAST QUOTATION

Request FCM2F4 Pricing

To prepare a precise quotation, please provide:

Part Number	Quantity
Destination	Required Date
Machine / System

CONTACT AMIKON

Email sales@amikon.cn Phone / WhatsApp 86-18020776792

Sales Manager Miya zheng

DELIVERY

3–5 Days

WARRANTY

12 Months

PACKAGING

Brand New

PAYMENT

T/T

DELIVERY WAY

E-packing / FedEx / EMS / TNT / DHL / UPS

02 / ENGINEERING VALUE

Why FCM2F4?

FCM2F4 is the 4 km member of the FCM2F family. Its role is not simply to extend a cable run; it enables a physically distributed 200 Series architecture while retaining a fiber-based communication path between baseplates.

04 KM EXTENSION Nominal maximum baseplate-to-baseplate fiber distance of 4 km.	FIBER ISOLATION Helps isolate communication paths from voltage differences and ground-loop conditions.
NO CALIBRATION The module does not require calibration.	REDUNDANT OPTION FCMs can be mounted in pairs for redundant Fieldbus A/B paths; a non-redundant configuration uses one FCM.

Technical
Core

Parameter	FCM2F4 Specification
Foxboro Part Number	RH917JA
Function	Fiber optic extension of the Module Fieldbus
Maximum Fiber Distance	Up to 4 km (2.48 mi)
Fiber Type	Multimode graded-index glass fiber
Fiber Core / Cladding	62.5 μm core / 125 μm cladding
Connector	ST-type connectors
Numerical Aperture	0.275
Maximum Signal Loss	1 dB/km at 1300 nm; 3.6 dB/km at 850 nm
Input Voltage	24 V DC +5%, −10%
Power Consumption	5 W maximum at 24 V DC
Operating Temperature	−20 to +70 °C (−4 to +158 °F)
Relative Humidity	5 to 95%, noncondensing
Vibration	0.75 g, 5 to 200 Hz
Dimensions	102 mm H × 45 mm W × 104 mm D; 114 mm H including mounting lugs
Approx. Weight	284 g

04 / FAMILY POSITION

FCM2F Series

The FCM2F family provides three distance classes for fiber-based extension of the 200 Series Module Fieldbus. The selection is primarily determined by the required distance and fiber architecture.

Model	Part Number	Maximum Distance	Fiber
FCM2F2	RH914YZ	2 km	Multimode graded-index
FCM2F4	RH917JA	4 km	Multimode graded-index
FCM2F10	RH916TQ	10 km	Single-mode

SELECTION LOGIC

Why 4 km?

FCM2F4 is positioned between the 2 km FCM2F2 and 10 km FCM2F10. It is the natural choice when the required baseplate separation exceeds the shorter range but does not call for the 10 km class.

05 / FIELD DEPLOYMENT

Where FCM2F4 Fits

Remote Baseplate Placement

Useful when 200 Series FBMs need to be positioned closer to field devices while the control architecture remains physically separated.

Electrically Noisy Areas

Fiber communication is suited to environments containing rotating machinery, arc welders and high-voltage cable routes.

Lightning / Ground-Potential Concerns

The electrical isolation of the optical link helps reduce exposure to voltage differences and ground-loop conditions.

INSTALLATION CHECKPOINTS

Before Replacement

01	Confirm the FCM2F type at both ends of the fiber segment.
02	Verify that the installed fiber meets the specified multimode graded-index characteristics.
03	Check ST-type connector termination and the total optical path loss.

FIELD SYMPTOMS

When Investigation Is Needed

Intermittent communication: inspect the fiber path, connectors, link indicators and cable loss before replacing the module.

Loss of one redundant path: check the corresponding FCM, fiber pair and Fieldbus A/B connection.

No optical communication after replacement: verify that both ends use matching FCM2F types and that the fiber characteristics are correct.

Buyer
FAQ

Q1. Can FCM2F4 be used when the required baseplate distance is around 4 km?

Yes. FCM2F4 is the 4 km member of the family and provides a nominal maximum baseplate-to-baseplate fiber optic distance of up to 4 km. The actual installation should remain within the specified optical loss and cable requirements.

Q2. Is FCM2F4 a suitable replacement when an existing 2 km FCM2F2 no longer provides enough distance?

FCM2F4 provides the next distance class in the FCM2F family, but a replacement should be evaluated against the complete fieldbus topology, fiber type, connector arrangement and the matching module at the opposite end.

Q3. Does FCM2F4 require a second module for every installation?

Not always. A non-redundant configuration can use one FCM per baseplate. For a redundant Fieldbus arrangement, FCMs are mounted in pairs to support the A and B paths.

Q4. What fiber should be selected for FCM2F4 when replacing an installed module?

FCM2F4 requires multimode graded-index glass fiber with a 62.5 μm core and 125 μm cladding, 0.275 numerical aperture and ST-type connectors. The specified optical loss limits also need to be respected.

Q5. Why choose FCM2F4 instead of FCM2F10 for a replacement project?

FCM2F4 is intended for the 4 km distance class, while FCM2F10 is the 10 km class and uses single-mode fiber. When the required link is within the 4 km class, FCM2F4 can provide the appropriate family-level solution without moving to the longer-distance FCM2F10 architecture.

	AMIKON INDUSTRIAL AUTOMATION Automation Parts, Sourced for Continuity. Amikon supports industrial automation projects with a broad range of PLC, DCS, control and monitoring components. Our focus is practical: helping customers shorten equipment downtime, secure difficult-to-source parts and keep critical systems moving. Multi-brand capability HIMA • ABB DCS • ABB Robot Parts • KUKA Robot Parts • Rockwell / ICS Triplex • TRICONEX • Woodward • GE • Yokogawa • Bently Nevada • Emerson DeltaV / CSI 6500 / epro
	Wherever the required automation part is located, Amikon works to arrange efficient sourcing and international delivery for spare and operational components. For urgent projects, please include the required date with your inquiry so the logistics route can be evaluated promptly. Email Amikon WhatsApp Sales

AFTER-SALES

Return Support

Please contact us within 7 days after receiving the items if you have any question. Returned items should remain in their original condition, together with the specific reason for the return. After the returned items are received and reviewed, we can arrange an appropriate return or replacement for the order. Shipping costs resulting from the return are the buyer's responsibility.

07 / ADDITIONAL AUTOMATION PARTS

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