schneiderFoxboro™ DCS FBM217 Discrete Input Module PSS 41H-2S217 Product Specification May 2025

cabling, power, or communication cabling.

Redundant modules must be located in adjacent positions on the baseplate, with the

first module located in an odd-numbered position (for example, the positions labelled

"3" and "4"). To achieve redundancy, a redundant adapter module is placed on the two

adjacent baseplate termination cable connectors to provide termination for a single

cable. A single termination cable connects from the redundant adapter to the

associated termination assembly (TA).

When redundant, either module may be replaced without upsetting field input signals

to the good module. The module can be removed/replaced without removing field

device termination cabling, power, or communications cabling.

Redundant Modules in Foxboro DCS HMI

The redundant pair of modules appear as two independent modules to system

management software applications, such as Foxboro DCS System Manager and

System Manager/Display Handler (SMDH). The functional redundancy for these

modules is provided by their associated control blocks.

Sequence of Events

The Sequence of Events (SOE) software package (for use with I/A Series® v8.x

software and Control Core Services v9.0 or later) is used for acquisition, storage,

display, and reporting of events associated with digital input points in a control system.

SOE, using the optional GPS based time synchronization capability, supports data

acquisition across control processors at intervals of up to one millisecond, depending

on the signal source.

Refer to Sequence of Events (PSS 31S-2SOE) to learn more about this package, and

to Time Synchronization Equipment (PSS 41H-4C2), for a description of the optional

time synchronization capability.

Foxboro DCS with software earlier than V8.x can support SOE through ECB6 and

EVENT blocks. However, these systems do not support GPS time synchronization

and use a timestamp sent by the Control Processor which is accurate to the nearest

second and does not provide synchronization between different Control Processors.

Fieldbus Communication

A Fieldbus Communications Module or a Control Processor interfaces to the 2 Mbps

module Fieldbus used by the FBMs. The FBM217 accepts communication from either

path (A or B) of the 2 Mbps Fieldbus. If one path is unsuccessful or is switched at the

system level, the module continues communication over the active path.

Modular Baseplate Mounting

The module mounts on a DIN rail mounted baseplate, which accommodates up to four

or eight Fieldbus Modules. 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.

Redundant modules must be located in odd and even adjacent positions on the

baseplate (positions 1 and 2, 3 and 4, 5 and 6, or 7 and 8). To achieve the

redundancy, a redundant adapter module is placed on the two adjacent baseplate

termination cable connectors to provide a single termination cable connection. A

single termination cable connects from the redundant adapter to the associated TA.

To system configurator applications and monitoring through SMON, System Manager,

and SMDH, redundant modules appear to be separate, nonredundant modules. The

functional redundancy for these modules is provided by their associated control

blocks.

Termination Assemblies

Field I/O signals connect to the FBM subsystem via DIN rail mounted TAs. The TAs

used with the FBM217 are described in Termination Assemblies And Cables, page 12.

Functional Specifications

FBM218 Module • Input:

32 group isolated channels

• On-State Voltage:

15 to 30 VDC

• Off-State Voltage:

0 to 5 VDC

• Current:

2.2 mA (typical) at 30 VDC Input

• Source Resistance Limits (Applies to All TAs):

◦ On-State:

1 kΩ (maximum) at 15 VDC

◦ Off-State:

100 kΩ (minimum) at 30 VDC

Filter/Debounce Time(1) Configurable (No Filtering, 4, 8, 16, or 32 ms)

Maximum Pulse Count Rate 250 Hz

Isolation

(Module/TA Combination)

For TAs that provide group isolation (RH916CA, RH916XZ, RH916YB,

RH916QA, RH924HA, RH924HP, RH924HQ, RH924HS, and RH924HT),

input channels are group isolated from ground. For details, see Standard

and Compact 200 Series Subsystem User's Guide (B0400FA). These

module/TA combinations can withstand, without damage, a potential of 600

VAC applied for one minute between the group isolated channels and

ground.

DANGER

HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH

Although the module can withstand a maximum of 600 VAC applied for

one minute between any channel, DO NOTapply voltages beyond the

published input ranges. The channels are NOT intended for permanent

connection to hazardous voltage circuits. Understand that connection of

these channels to voltages greater than 30 VAC or 60 VDC violates

electrical safety code requirements and may expose users to electric

shock.

Failure to follow these instructions will result in death or serious

injury.

• High-voltage TAs RH916YB, RH916QA, and P0916QB:

Inputs are group-isolated.

These TAs can withstand UL required dielectric potentials.

• High-voltage TAs RH916YA, RH916PU, and P0916PV:

Inputs are channel isolated.

These TAs can withstand UL required dielectric potentials.

Communication Communicates with its associated FCM or FCP via the module Fieldbus