Foxboro P0916PH P0916JS Industrial Control Module

OVERVIEW

The Intrinsically Safe I/O Subsystem provides

integration between the Pepperl+Fuchs (P+F)

modular intrinsically safe remote I/O systems and the

I/A Series system. The Intrinsically Safe

Communications Module (ISCM) communicates

between the two systems, as it enables I/A Series

control processors to view supported P+F intrinsically

safe I/O modules as equivalent 200 Series Fieldbus

Modules (FBMs) over the I/A Series 2 Mbps HDLC

Fieldbus. This allows the I/O modules to be

monitored with standard I/A Series blocks and

standard I/A Series or InFusion system/control

configurator applications such as InFusion

Engineering Environment and ICC.

This subsystem supports both the P+F intrinsically

safe I/O modules and their associated base,

extension or redundancy units for Zone 2. Div. 2 or

Zone 22 (LB-style(1)) environments or

Zone 1 or Zone 21 (FB-style(2)) environments.

Optionally redundant ISCMs are mounted directly on

the appropriate P+F unit along with the I/O modules

and power supplies, as shown in Figure 1 and

Figure 2. Only I/O modules can be mounted in the

extension units. Each I/O module can be plugged

into any desired slot on the base or extension unit.

ISCMs and power supplies are required to be

plugged into their own dedicated slots

Depending on the model type used, I/O modules can

occupy one or two slots in their unit.

ISCMs are installed as single or redundant. In

redundant configurations, both ISCMs are always

active. In case of a module’s failure, the other

provides backup coverage until the failed ISCM is

returned to service. An ISCM for Zone 2 applications

may support up to 46 LB-style I/O modules, while an

ISCM for Zone 1 applications may support up to 48

FB-style I/O modules.

The following 200 Series FBM features are

not supported on the intrinsically safe I/O

modules: Sequence of Events (SOE), TDR,

time synchronization, ladder logic, and the

EVENT, MDACT and DPIDA blocks.

NOTE

The limit of sixteen ISCMs per subsystem

represents the theoretical maximum if the

base, extension or redundancy units are not

fully fitted with modules. Sixteen base units

with sixteen extension units will connect a

total of 16 x 46 I/O modules (736). The

controller can handle up to 204. If dual-width

modules are used, then the subsystem will

have 16 x 23 dual-width I/O modules (368)

which is outside the scope of the

subsystem. In typical scenarios, eight units

can be connected to one FCP270.