ABB AC800M and S800 IO Power supplies and voters

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. 

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.

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

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.