Schneider Electric Zelio SR3B Compact Smart Relay

Name: Schneider Electric Zelio SR3B Relay | Seven Star LLC
Brand: Schneider Electric

Description

Overview

Schneider Electric Zelio SR3B is a compact smart relay built for industrial and commercial electrical installations in Oman and across the GCC. It combines rugged construction with proven programmable relay logic control performance, making it a dependable choice for panel builders and facility engineers on new installations and retrofits alike. The design accounts for the high ambient temperatures and dust loading typical of Gulf industrial sites, and technical support is available through Schneider Electric’s regional engineering network.

Working closely with plant engineers in the region, Seven Star LLC supplies the Schneider Electric Zelio SR3B with manufacturer documentation and local technical support throughout Oman, Muscat, and the broader GCC. Buyers can source the Schneider Electric Zelio SR3B through Seven Star LLC with a formal quotation, the manufacturer datasheet and technical support with selection.

Operating Principle

The Schneider Electric Zelio SR3B executes user-programmed logic — built from ladder diagram or function block instructions — on a compact internal processor that continuously scans digital and analog inputs, evaluates the configured program, and drives its output relays accordingly. This scan-and-execute cycle repeats continuously at high speed, allowing the Schneider Electric Zelio SR3B to replace dozens of conventional timers, counters, and auxiliary relays with a single, reprogrammable device.

In practice, this operating principle gives the Zelio SR3B consistent, repeatable performance over a long service life with minimal maintenance. Behaviour stays predictable under varying load and environmental conditions, and the unit integrates easily into new or existing Schneider Electric systems, including EcoStruxure-enabled monitoring architectures where applicable. That makes it a sound long-term choice for programmable relay logic control duties in facilities where unplanned downtime is costly.

Engineering Design of the Schneider Electric Zelio SR3B

The Schneider Electric Zelio SR3B is housed in a compact DIN-rail-mountable enclosure with an integrated LCD display and navigation keys, allowing programs to be written, tested, and modified directly at the unit without a separate programming terminal. Removable screw terminals simplify wiring and replacement, while the unit’s wide supply voltage tolerance suits both 24V DC control circuits and standard AC distribution.

Each unit goes through Schneider Electric’s standard quality and type-test regime, covering dimensional consistency, insulation performance and mechanical durability over the rated operating life. Installers in Sohar, Salalah and the Muscat governorate report straightforward commissioning and reliable long-term operation when the Zelio SR3B is installed to Schneider Electric guidelines. Seven Star LLC’s technical team can advise on sizing and installation practice before you order.

Key Features

The Schneider Electric Zelio SR3B delivers a combination of engineering benefits that make it a preferred choice for Schneider Electric programmable relay logic control specifiers across the region:

Onboard LCD display and keypad for direct on-unit programming and monitoring.
Ladder logic and function block programming replacing multiple discrete relays.
Compact DIN-rail enclosure that saves significant panel space.
Removable terminal blocks for fast wiring and unit replacement.
Built-in real-time clock functions supporting scheduled control sequences.
Wide operating voltage range suited to varied control-circuit designs.
Expandable I/O for growing control requirements without redesign.
Proven reliability for standalone automation in machinery and utility panels.

Industrial Applications

The Schneider Electric Zelio SR3B is a familiar sight in small machine control panels, pump station automation, lighting control, and utility skid packages across Oman’s industrial and commercial sectors. Contractors serving projects from Muscat to Sohar specify the Schneider Electric Zelio SR3B wherever compact, cost-effective programmable control is needed without the complexity of a full PLC system.

Seven Star LLC supplies the Zelio SR3B to EPC contractors, panel builders and end users in Oman’s oil and gas, petrochemical, water desalination, district cooling and commercial real estate sectors. From commercial towers in Muscat to the Sohar and Salalah free zones, it is specified for greenfield projects and brownfield upgrades alike, backed by regional supply and support.

Technical Specifications

The table below summarizes the principal technical characteristics of the Schneider Electric Zelio SR3B as published by Schneider Electric; compatible accessories, mounting variants, and rating options for the Schneider Electric Zelio SR3B are available through Seven Star LLC on request.

Parameter	Specification
Model	Schneider Electric Zelio SR3B
Digital Inputs	8–12 (variant dependent)
Outputs	Relay outputs, 8A resistive
Supply Voltage	12/24V DC or 100–240V AC
Display	Compact LCD with keypad
Programming	Ladder logic via onboard keypad or software
Memory	Non-volatile program storage
Expansion	Compatible expansion I/O modules
Operating Temperature	-25°C to +55°C

Request a Quote for Schneider Electric Zelio SR3B Compact Smart Relay

To request a formal RFQ for the Schneider Electric Zelio SR3B, contact Seven Star LLC. We supply Schneider Electric equipment across Oman and the GCC with lead time confirmed at quotation, provide full technical datasheets on request, and offer application engineering support and technical support through our instrumentation and electrical distribution division. Units are supplied with manufacturer documentation, and multi-unit orders for larger projects are welcome.

Where the Schneider Electric Zelio SR3B is used

Small machine control
Pump and fan sequencing
Lighting and building control
Panel retrofits
Timer and counter tasks

Selection checklist for the Schneider Electric Zelio SR3B

Number of inputs
Number of outputs
Analog input needs
Supply voltage
Programming method
Display needs
Panel space
Expansion needs

Installation, commissioning and maintenance notes for the Schneider Electric Zelio SR3B

Clip the relay onto the DIN rail and wire the supply, inputs and outputs. Load the program and test each output in a safe state. Check the terminals and the program backup at regular intervals.

Requesting a quotation for the Schneider Electric Zelio SR3B

Please send the number of inputs and outputs, the supply voltage and the control task. Seven Star LLC serves industrial customers in Oman and the GCC and replies with a quotation based on the information provided.

Zelio SR3B relay type

It is a compact smart relay.

Zelio SR3B maker

It is made by Schneider Electric.

Zelio SR3B sites

It is built for industrial and commercial electrical installations in Oman and across the GCC.

Zelio SR3B users

It serves panel builders and facility engineers.

Zelio SR3B projects

It suits new installations and retrofits alike.

Zelio SR3B climate

The design accounts for the high ambient temperatures and dust loading of Gulf industrial sites.

Zelio SR3B program

It runs a user-programmed logic built from ladder diagram or function block instructions.

Zelio SR3B processor

A compact internal processor runs the program.

Zelio SR3B scan

The processor continuously scans digital and analog inputs.

Zelio SR3B outputs

It evaluates the configured program and drives its output relays.

Zelio SR3B cycle

The scan and execute cycle repeats continuously at high speed.

Zelio SR3B timers and counters

One device can take on the work of many timers, counters and auxiliary relays.

Zelio SR3B reprogramming

The logic can be changed without rewiring the panel.

Zelio SR3B housing

It sits in a compact enclosure for DIN rail mounting.

Zelio SR3B display

An integrated LCD display and navigation keys allow programs to be written on the unit.

Zelio SR3B EcoStruxure

It fits into new or existing Schneider Electric systems, including EcoStruxure monitoring architectures where applicable.

Zelio SR3B service life

It gives consistent performance over a long service life with little maintenance.

Zelio SR3B downtime

It is a sound choice where unplanned downtime is costly.

Zelio SR3B documentation

Manufacturer documentation is supplied with a quotation.

Zelio SR3B support

Seven Star LLC gives local technical support with selection.

Program records for the Schneider Electric Zelio SR3B

Keep a copy of the program, the wiring list and the date of each change.

Choosing the right Schneider Electric Zelio SR3B model

Choose the model from the input and output count, the supply and the control task.

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About brand

Circuit breakers make up the largest part of our Schneider Electric listing, from Acti9 modular devices through ComPacT NSX molded case breakers to MasterPact air circuit breakers. Schneider Electric, which dates from 1836 and is headquartered in Rueil-Malmaison, France, is equally established in drives, PLCs and power metering.

Seven Star LLC is an independent supplier of Schneider Electric circuit breakers, Altivar drives, Modicon I/O, power meters, soft starters and dry-type transformers to panel builders and plants in Oman and the GCC.

Schneider Electric product families on this page

Low voltage protection covers Acti9 miniature breakers and their communicating system, ComPacT NSX and PowerPacT H-frame molded case breakers and MasterPact NW air circuit breakers. Altivar 320 variable speed drives appear in several ratings, for example the ATV320U22N4C at 2.2 kW and the ATV320U75N4B at 7.5 kW. Automation is represented by Modicon TM3 expansion modules such as the TM3TM thermocouple input module. Metering includes the EasyLogic PM2000 power meter and iEM2000 modular energy meters. Trihal cast resin transformers and Spacial enclosure accessories complete the electrical distribution side.

Where Schneider Electric equipment is used

Main and distribution switchboards in buildings, utilities and industrial plants carry the breakers and meters. Altivar drives run pumps, fans, conveyors and packaging machines. Modicon controllers with TM3 I/O are common in machine builders' panels, and Trihal transformers serve indoor substations where a dry-type unit is specified.

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The commercial reference printed on the product or its carton is the fastest route. For breakers without a reference send rated current, breaking capacity, number of poles, trip unit type, fixed or drawout construction and the accessories fitted, such as shunt trip, auxiliary contacts or motor mechanism. For drives give motor power, supply voltage and the communication option. For transformers send rated power, primary and secondary voltage, vector group and enclosure rating.

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