ABB PP220 3BSC690099R1 operation panel interface screen

Description

PP220 3BSC690099R1 The Safety Digital Input (SDI) board used with Safeguard 400 Series is DSDI 110N.This is

based on the DSDI 110A for the normal S100 I/O system. The connection units are made with

dual connections. The DSDI 110N board is used with connection unit DSTD N030 with one or

two logic boards DSTD N031.

The DI-board database configuration is equal PP220 3BSC690099R1 to DSDI 110. Channel 32 is used as the test

indication signal between the connection unit and the input board.

The loop signals are connected to the connection unit. This unit contains:

• Terminals for connection of 31 field input signals. PP220 3BSC690099R1 Power distribution for the field

devices.ï

• The field termination unit is equipped with logic boards for generation of test patterns. It

can be configured with one or two logic boards. One logic board is used in single

controller systems. With two logic boards, each board is generating independent test

signals for each controller in a dual system. A yellow LED indicates that the test is

running.

The input board DSDI 110N contains:

In addition to the verification PP220 3BSC690099R1 of the test patterns from the connection unit, the digital input

board performs several internal diagnostics.

3.2.2 Output Subsystem

The local output subsystem consists of S100 I/O output cards mounted in the S100 I/O sub-rack.

Local outputs are available in the following types:

1. Master Vote 3000 safety digital outputs (24 VDC)
2. Normally Energized (NE) outputs for e.g. shutdown valves
3. Normally De-energized (ND) outputs for e.g. fire protection devices
4. DSDO 110 non fail-safe digital outputs, transistor type, for status outputs. (relay output)
5. DSDO 115 non fail-safe digital outputs, relay type, for status outputs. (24 VDC)
6. DSAX 110 analog I/O for PID control in high availability control systems
7. DSAO 130 analog output signals.

3.2.2.1 Master Vote 3000, safety digital outputs

The Master Vote 3000 output stage is a safety output unit designed to reduce output spurious

trips to a minimum, while at the same time guaranteeing executive action on demand. The

Master Vote 3000 units are designed to PP220 3BSC690099R1 support extended and independent self-testing and

monitoring functions, including associated field devices such as cables and actuators. The

system incorporates a fail-to-safe isolate function, and offers true output state read-back and

continuous loop fault monitoring.

The Master Vote 3000 functions handle:

• One out of two output voting (1oo2D) in normal operation for Normally Energized (NE)

and Normally De-energized (ND) signals.

• Performs active testing and diagnosis on itself and the processing units to control fault

tolerant and fail-to-safe fall-back.

• Permits isolation of one branch for maintenance operations.
• Tests and/or read-back the field output loops to provide information on internal and

external component malfunctions.

Normally Energized (NE) outputs power the field device during normal operation. Power is

interrupted to cause shutdown action. These outputs are used for shutdown valves, fire dampers

and similar devices where fail-to-safe action is required. The fail-to-safe action is to de

energize.

Normally De-energized (ND) outputs control field devices that are not powered during normal

operation. Power is applied to cause action. These outputs are used for fire fighting, and

alarming devices that do not require action on failure to take place. The fail-to-safe action is to

remain de-energized.

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