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Voting Units

The Voting Units SS822Z, SS823 and SS833 have been

specifically designed to be employed as a control

unit within a redundant power supply configuration. The output connections from two Power Supply

Units are connected to the Voting Unit. The Voting

Unit separates the redundant Power Supply Units, supervises the voltage supplied, and generates supervision signals to be connected to the power consumer.

Green LED’s, mounted on the front panel of the voting unit, provide a visual indication that the correct

output voltage is being delivered. Simultaneously

with the green LED illuminating, a voltage free contact closes the path to the corresponding “OK connector”. Voting Unit trip levels, are factory preset.

High Integrity

The AC 800M High Integrity and the connected S880

High Integrity I/O system (including field power)

shall be supplied from a SELV or PELV power supply

(e.g. SD83x) connected through the power voter

SS823. The SS823 Voting Unit has double overvoltage protection circuit, limiting the output voltage to

max 30 VDC. It is also able to detect both short and

open circuit in the voting element.

The SS822Z and SS823 units is also G3 compliant.

Key Features

• Simple DIN-rail mounting

• Class I Equipment, (when connected to Protective Earth, (PE))

• Over-voltage Category III for connection to primary main TN network

• Protective separation of secondary circuit from primary circuit

• Accepted for SELV and PELV applications

• The output of the units is protected against over

current (current limit) and over voltage (OVP)

• SD834 can be connected in parallel to increase output power

• Both a.c. and d.c. input at SD831 and SD834

• Floating DC-OK relay contact at SD834

The Voting Unit separates the redundant Power Supply Units, supervises the voltage supplied, and

generates supervision signals to be connected to the power consumer.

Green LED’s, mounted on the front panel of the voting unit, provide a visual indication that the correct

output voltage is being delivered. Simultaneously

with the green LED illuminating, a voltage free contact closes the path to the corresponding “OK

connector”. Voting Unit trip levels, are factory preset.

Power Supplies

The SD83x and SD85x Power Supply Units are designed to meet all the applicable electrical safety

data stated by the EN 50178 harmonized European

Standard Publication and the additional safety and

function data required by EN 61131-2 and UL 508.

The secondary output circuitry is accepted for SELV

or PELV applications.

They are switch-mode Power Supply Units which

convert the mains voltage to 24 volts d.c. These

power supplies can be utilized for non-redundant

and redundant applications. Redundant applications

require diode voting units SS823 or SS832.

With the type SD83x series Power Supply Units,

there is no requirement for the installation of a

mains filter. They provide a soft start feature; power-on of an SD83x will not trip fuses or earth-fault

circuit breakers. The SD822Z is also G3 compliant.

The range also supports power supply configurations of the AC 800M and S800 I/O based IEC 61508-

SIL2 and SIL3 rated solutions. A Mains Breaker Kit for

DIN Rail is also available for our power supplies and voters.

For updated information regarding this hardware

please visit our Hardware Selector. In the selector

you can compare different communication modules,

AC 800M controllers, S800 IO modules, Select I/O

modules, module termination units, 800xA networks

equipment, power supplies and voters, Panel 800 and

also print your own PDF files. 

They are switch-mode Power Supply Units which

convert the mains voltage to 24 volts d.c. These

power supplies can be utilized for non-redundant

and redundant applications. Redundant applications

require diode voting units SS823 or SS832.

With the type SD83x series Power Supply Units,

there is no requirement for the installation of a mains filter.

They provide a soft start feature; power-on of an SD83x will not trip fuses or earth-fault

circuit breakers. The SD822Z is also G3 compliant.

Scales from low cost, standard function to high end features like hot-swap, HART, time tagging, redundancy down to I/O channel.

S800 I/O is an open comprehensive, distributed, process I/O system that communicates with

controllers by direct connection or over industry-standard field buses.

Thanks to its open connectivity it fits a wide range of process controllers from ABB and others.

By permitting installation in the field, close to sensors and actuators, S800 I/O reduces the installation cost by reducing the cost of cabling.

For up to date technical data on panels, comparisons, and to generate data sheets, please visit Compact Hardware Selector:

Benefits

• Cost effective solutions to practically all needs for field device interfacing, including basic analog and digital I/O, as well as intrinsic safety and high integrity solutions.

• Highly modular and can be built in a near infinite number of ways, from highly centralized to highly distributed.

• Supporting industry standard field bus PROFIBUS DP, compatible also with non-ABB controllers; supports also ABB’s Advant Fieldbus 100

• Configured transparently as part of  parent controllers, like local I/O; no additional knowledge or skills are required.

• Comprehensive diagnostics, hot swapping of modules and redundancy solutions contribute to keeping production up

S800 I/O is a comprehensive, distributed and modular process I/O

system that communicates with parent controllers and PLCs over

industry-standard field buses. Thanks to its broad connectivity it fits

a wide range of process controllers and PLCs from ABB and others.

By permitting installation in the field, close to sensors and actuators,

S800 I/O reduces the installation cost by reducing the cost of cabling.

And thanks to features such as “hot swap” of modules, on-line

reconfiguration and redundancy options, it contributes to keeping

production – and thereby profits – up. 

Scales from low cost, standard function to high end features like hot-swap, HART, time tagging, redundancy down to I/O channel.

S800 I/O is an open comprehensive, distributed, process I/O system that communicates with

controllers by direct connection or over industry-standard field buses.

Thanks to its open connectivity it fits a wide range of process controllers from ABB and others.

By permitting installation in the field, close to sensors and actuators, S800 I/O reduces the installation cost by reducing the cost of cabling.

The new generation of HMIs has a huge impact on operator performance:

• they improve the operator’s ability to detect abnormal situations before an alarm occurs by a factor of five;

• the operator success rate in handling abnormal situations is almost 100 percent; and,

• the time it takes to correctly handle the situation is almost half that of operators working with traditional HMIs.

Besides grayscale graphics and the consistent and careful use of color, shapes and motion,

high performance graphics typically include the following features to maximize the attention and effectiveness of the operator:

• Alarm priority colors are used for alarms only

• Consistency in graphic layout to ensure operator situational awareness

• Tab-based navigation for one-click access to primary displays

• Embedded trends, which display historical data in a graphic to efficiently draw

the attention of the operator to abnormalities and deviations

• The normal operating range and high / low alarm limits are shown for

each item of equipment using an intuitive bar graph (see Figure 5)

• Bubble-up alarming allows the alarm with the highest priority to ‘bubble up’ 

above lower priority alarms associated with the same device