Schneider Electric SR3PACKBD Zelio Discovery Pack 10 I/O

SR3PACKBD: Zelio Logic discovery pack with 10 I/O on 24 V DC

The SR3PACKBD is a Schneider Electric Zelio Logic discovery pack: a boxed starter kit rather than a bare controller. According to the datasheet the kit composition is the smart relay SR3B101BD together with the PC connection cable SR2USB01. SR3PACKBD therefore gives a commissioning engineer everything needed to download and test a first programme on the bench: a unit with 6 discrete inputs and 4 relay outputs (that is 10 I/O), a local display, and the USB lead. Seven Star LLC supplies the SR3PACKBD in Oman and the GCC as an independent supplier based in Muscat.

The reference itself reads as a pack code: the PACK portion identifies the kit, and the trailing letters follow the supply convention of the bundled controller (BD for the 24 V DC version). This is our reading of the datasheet data, not a published ordering table, so confirm the exact reference on your own order drawing.

How the SR3PACKBD compares with its Zelio Logic neighbours

The rows below are the nearest relatives of the SR3PACKBD among the references we handle, each taken from its own datasheet. They share the screw-terminal housing style and the same relay-output ratings, but differ in supply, I/O count and in whether you buy a pack or a unit.

Technical specifications of the SR3PACKBD

Installation, wiring and maintenance of the SR3PACKBD

Terminals accept 0.2–2.5 mm² solid or semi-solid conductors and 0.25–2.5 mm² flexible conductors with cable end, tightened to 0.5 N.m. The unit mounts on a 35 mm DIN rail, or can be screw-fixed with its retractable lugs, per the datasheet drawings. The datasheet connection diagrams call for a 1 A quick-blow fuse or circuit-breaker in the supply and inductive-load suppression where relay outputs drive coils.

Power up with field loads disconnected, check each input state on the display, then force each output before connecting equipment. Keep a copy of the programme with the project records so that a replacement can be loaded quickly; as a spare, the SR3PACKBD should be stored dry within the −40 to 70 °C storage range. Periodic inspection should cover terminal tightness, cabinet temperature and dust on ventilation openings.

Supply, programme and environmental limits

The rated supply is 24 V DC with limits of 19.2–30 V. Quoted consumption is 100 mA with or without extensions, and the power figure is 3 W without extension, 8 W with extensions. Reverse polarity protection is listed, which forgives a swapped supply pair during commissioning. The programme memory is checked on every power-up and is backed up for 10 years at 25 °C, with a cycle time of 6–90 ms. The unit has a real-time clock, so weekly schedules and timed events can live inside the programme; the datasheet gives a clock drift of 12 min/year over 0–55 °C or 6 s/month at 25 °C.

Operating temperature is −20 to 55 °C, limited to −20 to 40 °C in a non-ventilated enclosure; storage is −40 to 70 °C; humidity is up to 95 % without condensation. Protection is IP20 at the terminals and IP40 at the front, pollution degree 2, overvoltage category III, up to 2000 m. In Gulf plants that translates to a closed, ventilated cabinet, not an open junction box exposed to heat and dust.

Inputs and outputs of the SR3PACKBD

The 6 discrete inputs of the SR3PACKBD are resistive 24 V DC inputs conforming to IEC 61131-2 type 1, drawing 4 mA each with a counting frequency of 1 kHz. State 1 is guaranteed from 15 V and state 0 up to 5 V, and the datasheet lists three-wire PNP proximity sensors as compatible, so limit switches and sensors can be wired straight to the terminals. Part of this input group is dual-purpose: 4 inputs can work as analogue inputs for 0–10 V or 0–24 V signals with 8-bit resolution (39 mV per step), a stated conversion error of ±5 % at 25 °C rising to ±6.2 % at 55 °C, and screened cable up to 10 m. Temperature probes of the NTC 10k type, the KTY81 family and Pt 500 are listed, so a simple thermostat function needs no extra transmitter.

The 4 outputs are relay outputs with normally open contacts, suitable for 24–250 V AC or 5–30 V DC. Thermal current is 8 A for all 4 outputs. The datasheet quotes an electrical life of 500,000 cycles in AC-12 at 230 V / 1.5 A, AC-15 at 230 V / 0.9 A, DC-12 at 24 V / 1.5 A and DC-13 at 24 V / 0.6 A, a minimum switching capacity of 10 mA at 12 V, a mechanical life of 10 million cycles, and a response time of 10 ms on and 5 ms off. Operating rate is 10 Hz without load but only 0.1 Hz at rated current, so these relays suit contactor coils and signalling duties rather than rapid cycling.

Choosing the SR3PACKBD as a starter or spare kit

• Confirm the control supply: 24 V DC. A pack with the other supply is a different reference.
• Count the field signals: 6 inputs and 4 relay outputs must cover your sequence, with spare capacity if the process may grow.
• Decide whether you need the PC cable: it is included here, so there is no need to order SR2USB01 separately for the first download.
• Check the clock requirement against the note in the specifications table.
• Check panel space against the dimensional drawing in the datasheet; the packed kit weighs 0.7 kg.

Typical uses of the SR3PACKBD in Oman and the GCC

With 10 I/O on 24 V DC, this unit fits small automation tasks where a PLC would be excessive: simple conveyor and packing interlocks, ventilation and air-handling fans in buildings and tank level and transfer control. As a kit it also suits training rooms, panel-shop bench tests and quick proof-of-concept builds. Ambient temperatures are high across the region and dust is fine, so cabinet ventilation and the derating note above deserve attention. Utilities, facilities contractors and OEM panel builders use units of this size mainly for standalone sequences, local backup logic and retrofits of ageing relay panels.

Information to send with an RFQ for the SR3PACKBD

• Exact reference SR3PACKBD and quantity.
• Control supply voltage and frequency on site.
• Load types on the outputs and whether surge suppression is fitted.
• Any accessories required in the same order, such as extension modules or a programming cable.
• Delivery location and project deadline.

Documents and quotation

The manufacturer datasheet for the SR3PACKBD is attached on this page and lists the full specification summarised above, including dimension drawings and connection diagrams. Check the revision date against your project requirements.

Send us the reference SR3PACKBD, the quantity and the delivery location and Seven Star LLC will reply to your RFQ. We supply as an independent supplier based in Muscat.