Foxboro FBM239, Discrete 16DI/16DO Module

FBM239, Discrete 16DI/16DO Module

The FBM239 contains 16 discrete input and 16 discrete output channels that are compatible with voltages

and currents commonly found in industrial plants.  An external power supply is used to energize the field

circuits.

OVERVIEW

The FBM239 Discrete 16DI/16DO Module provides

16 digital inputs with sixteen digital output channels.

Associated Termination Assemblies (TAs) and

Termination Assembly Adapters (TAAs) provide for

discrete nominal inputs of 30 V dc, 60 V dc,

120 Vac/125 V dc or 240 Vac and nominal outputs

of 60 V dc, 120 V ac/125 V dc or 240 V ac. The

module performs signal conversion required to

interface the electrical input signals from the field

sensors to the Module Fieldbus.

Depending on the type of I/O signal required, the TAs

or TAAs support current limiting devices, high voltage

attenuation circuits, optical isolation and external

power source connections.

When connected to the appropriate Termination

Assembly Adapters (TAAs) or TAs, the FBM239

module provides functionality formerly provided by

the 100 Series FBM I/O subsystem.  TAAs and TAs

are available which support the functionality of the

main FBM09. FBM10. FBM11. FBM26 and FBM41

(8 input/ 8 output main FBMs).  These main FBMs

may be used with expansion FBM14. FBM15.

FBM16. FBM27 or FBM42 (8 input/8/output

expansion FBMs).

FEATURES

Key features of the FBM239 are:

 Sixteen digital input channels, used for either

contact sensing, or DC voltage monitoring

 Sixteen digital output channels, used for either

DC output switching with an external source (e.g.

to control powering of various external loads), or

DC output switching with an internal source only

(e.g. to power external solid state relays or other

similar devices)

 Rugged design suitable for enclosure in Class G3

(harsh) environments

 Supports discrete input signals at voltages of:

• 30Vdc/60 Vdc

• 120Vac/125 V dc

• 240V AC

 Supports output switching at voltages of:

• 60 V DC

• 120 V AC/125 V DC

• 240 V AC

 Executes the programs for Digital I/O (ECB5), and

Ladder Logic (ECB8)

 Various Termination Assemblies (TAs) provide for

per-channel isolation and 100 Series I/O

upgrade, and contain:

• High voltage attenuation and optical isolation

for inputs

• External power connection for device

excitation

• Output current limiting.

STANDARD DESIGN

FBM239 has 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.

VISUAL INDICATORS

Light-emitting diodes (LEDs) incorporated into the

front of the module provide visual indication of the

Fieldbus Module operational status, as well as the

discrete states of the individual input/output points.

EASY REMOVAL/REPLACEMENT

The module can be removed/replaced without

removing field device termination cabling, power, or

communication cabling.

FIELDBUS COMMUNICATION

A Fieldbus Communications Module or a Control

Processor interfaces to the 2 Mbps module Fieldbus

used by the FBMs.  The FBM239 accepts

communication from either path (A or B) of the 2

Mbps Fieldbus —should one path fail or be 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.

FIELD I/O SIGNALS

Field I/O signals connect to the FBM subsystem via

DIN rail mounted TAs or Termination Assembly

Adapters (TAAs) mounted on the conversion

mounting structures.  TAAs are discussed in

Termination Assembly Adapter Modules for

100 Series Upgrade (PSS 31H-2W4). The TAs used

with the FBM239 are described in “TERMINATION

ASSEMBLIES AND CABLES” on page 7.

FUNCTIONAL SPECIFICATIONS

Input/Output Channels

16 group isolated digital input channels and 16 group

isolated digital output channels

Filter/Debounce Time

Configurable (No Filtering, 4. 8. 16 or 32 ms)

Voltage Monitor (FBM239 with feed through TA

RH924VJ (supersedes P0924VJ))

INPUT

30 V DC maximum applied voltage

ON-STATE VOLTAGE

15 to 30 V DC

OFF-STATE VOLTAGE

0 to 5 V DC

CURRENT INPUT FOR ON-STATE

2.3 mA maximum at 30 V DC

SOURCE RESISTANCE LIMITS

ON-STATE

1 k Ω (maximum) at 15 V dc

OFF-STATE

100 k Ω (minimum) at 30 V dc

Contact Sense (FBM239 with feed through TA

RH924VM (supersedes P0924VM))

CONTACT SUPPLY

24 V DC nominal (supplied by FBM through the

TA)

CONTACT CURRENT

1.8 mA DC nominal

Output (FBM239 with feed through TAs

RH924VJ (supersedes P0924VJ) or RH924VM

(supersedes P0924VM))

APPLIED VOLTAGE (EXTERNAL)

60 V dc maximum

LOAD CURRENT

0.24 A DC maximum per channel

2.0 A DC maximum per TA

INDUCTIVE LOADS

Outputs ma

FUNCTIONAL SPECIFICATIONS (CONTINUED)

Power Requirements

INPUT VOLTAGE RANGE

24 V dc +5%, -10%

MODULE CONSUMPTION

2.65 Operating

TEMPERATURE-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)

RELATIVE HUMIDITY