schneiderI/A Series® Hardware Control Processor 40

connect to each isolator.) The twinaxial Fieldbus 

extension may be redundant.

• Fiber Optic Fieldbus Extension (Figure 3) - The 

fiber optic Fieldbus can optionally extend the 

distance as well as add application versatility and 

security. Overall Fieldbus length can be up to 

20 km (12.4 mi). Like the twinaxial Fieldbus 

configuration, the fiber optic Fieldbus 

configuration supports up to 64 Fieldbus Modules 

(excluding expansion modules), up to 24 

Modules per isolator.

All three Fieldbus configurations use serial data 

communication complying with Electronic Industrial 

Association (EIA) Standard RS-485. The data 

transmission rate is 268.75 Kbps.

Panel Display Station Interfacing

The Control Processor 40 achieves the capability to 

interface Panel Display Stations when the DSI (Panel 

Display Station Interface) block is selected via the 

configurator. In this capacity, the Control 

Processor 40 can interface up to 24 Panel Display 

Stations, or a combination of Fieldbus modules 

(which may include associated Auto/Manual Stations) 

and Panel Display Stations mixed on the same 

Fieldbus. (Note, however, that per configuration rules, 

one Panel Display Station counts as two Fieldbus 

Modules.)

Control strategies should be planned such that all 

blocks involved with the Panel Display Station, 

Auto/Manual Station, and the control loops being 

monitored or controlled are in the same Control 

Processor 40, and ideally in the same compound.

The Control Processor 40 connects to the Panel 

Display Stations and Fieldbus Modules via either of 

two types of Fieldbus communications media: 

twinaxial cable or fiber optic cable. Figure 4 shows a 

typical twinaxial Fieldbus configuration, and Figure 5

shows a typical fiber optic Fieldbus configuration. 

(Refer to Fiber Optic Fieldbus Product Specification 

Sheet PSS 21H-7P1 B3 for additional fiber optic 

Fieldbus application information.)

Cluster I/O Subsystem Interfacing

The Control Processor 40 interfaces with the Fieldbus 

Cluster Input/Output Subsystem that consists of the 

Fieldbus, a multi-slot chassis configuration of a 

Fieldbus Processor (FBP10), analog/digital Fieldbus 

Cards (FBCs), and power supply and power monitor 

card. These Cluster I/O subsystems meet the needs 

of applications where a high number of channels per 

card are required. Figure 6 shows a typical twinaxial 

Fieldbus configuration. (Refer to the Fieldbus Cluster 

I/O Subsystem PSS 21H-2T1 B3 for additional 

information.)

SPECTRUM Migration Interfacing

The Control Processor 40 interfaces with a 

SPECTRUM Migration Integrator subsystem via a 

single or redundant I/A Series Fieldbus and a 

Fieldbus Processor (FBP) with built-in FBP isolator 

located within the subsystem. There are four different 

FBP integrators to accommodate Unit Control 

Modules (UCM), Field Input/Output Units (FIO), 

Universal Field Multiplexers (UFM), and Universal 

Input/Output Units (UIO).

The CP40 control strategy can include any of 

following SPECTRUM configurations:

• a single SPECTRUM Migration Integrator 

subsystem

• multiple types of SPECTRUM Migration 

Integrator subsystems

• Fieldbus Modules (FBMs) and/or other Fieldbusbased process interface subsystems along with 

the SPECTRUM Integrator subsystem(s)

Control is via the software resident in the FBP 

Integrator and in the SPECTRUM I/O Equipment 

Control Blocks (ECBs) operating at the CP level.

Figure 7 illustrates a typical configuration with 

multiple types of Integrator subsystems with nests of 

I/O cards. (Refer to PSS 21H-7Q1 B3 SPECTRUM 

Migration Integrators for additional information.)

Figure 7. Twinaxial Fieldbus SPECTRUM Migration Subsystem Interface Configuration (Typical Configuration)

SPEC 200 Control Interfacing

For migration of SPEC 200 control to I/A Series 

Systems, the Control Processor 40 interfaces via a 

single or redundant I/A Series Fieldbus with the 

SPEC 200 Control Integrator subsystem. This 

subsystem consists of individual Control Integrators, 

and Fieldbus Isolators attached within the SPEC 200 

rack.

Control is via the software resident in the Control 

Integrator and in the SPEC 200 I/O Equipment 

Control Blocks (ECBs) operating at the CP level. 

Figure 8 illustrates a typical configuration with 

multiple Control Integrators in the SPEC 200 

subsystem. (Refer to PSS 21H-7R1 B3 SPEC 200 

Control Integrators for additional information.)

Figure 8. Twinaxial Fieldbus SPEC 200 Control Subsystem Interface Configuration (Typical Configuration)

SPEC 200 MICRO Control Interfacing

For migration of SPEC 200 MICRO control to 

I/A Series systems, the Control Processor 40 

interfaces via a single or redundant I/A Series 

Fieldbus with the SPEC 200 MICRO Control 

Integrator subsystem. This subsystem consists of 

individual Control Integrators, and Fieldbus Isolators 

attached within the SPEC 200 MICRO rack (NCM or