Multispan SDX-22 Star Delta Timer | 0–60 Sec Delay | Dual Relay | 230V/415V
Multispan SDX-22 Star-Delta Timer – 0–60s Adjustable, Dual Relay Output
A DIN-rail star–delta timer with 0–60 s adjustable transition delay, selectable pause time, and dual relays for safe and smooth 3-phase motor starting in industrial control panels.
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The Multispan SDX-22 is a compact, industrial-grade star–delta timer engineered for smooth startup of 3-phase induction motors. With an adjustable 0–60s star-to-delta delay, selectable pause time, dual relay outputs, and LED status indicators, it ensures safe and reliable motor control in industrial starter panels.
Key Features
Adjustable Star-to-Delta Time: 0 to 60 seconds via front rotary knob
Pause Delay: Selectable 100 ms or 200 ms to prevent relay overlap
Dual Relay Output:
Star Relay: 1 C/O, 5A @ 230V AC
Delta Relay: 1 C/O, 5A @ 230V AC
Flexible Power Supply: 230V AC ±20% or 415V AC ±20%
LED Status Indicators: Power ON, Star ON, Delta ON
DIN Rail Mounting: 35mm standard rail
ABS Industrial Enclosure: Compact, durable, and panel-friendly
Size: 90 × 47 × 66.35 mm
Technical Specifications (Table)
| Parameter | Specification |
|---|---|
| Model | Multispan SDX-22 |
| Function | Star-Delta transition timer |
| Star-to-Delta Delay | 0–60 seconds (adjustable) |
| Pause Time | 100 ms or 200 ms (selectable) |
| Power Supply | 230V AC ±20% or 415V AC ±20% |
| Output Relays | 2 (Star & Delta), 1 C/O each |
| Relay Rating | 5A at 230V AC (resistive) |
| Indicators | LED for Power, Star ON, Delta ON |
| Mounting | 35 mm DIN rail |
| Enclosure | ABS body |
| Dimensions | 90 × 47 × 66.35 mm |
| Frequency | 50 Hz |
Applications
Star–delta starter panels
3-phase induction motors
Industrial blowers & pumps
Air compressors
Conveyor drives
HVAC motor control systems
Machinery requiring staggered motor start
What’s in the Box?
1 × Multispan SDX-22 Star-Delta Timer
Instruction sheet
Integrated DIN rail mounting clip
Warranty/support documentation
FAQ
Q1. What does a star–delta timer do?
It automatically transitions a motor from star to delta connection after a preset delay, reducing inrush current during startup.
Q2. Does SDX-22 work on 230V and 415V panels?
Yes, the timer supports both 230V AC and 415V AC (±20%) supplies.
Q3. Is the pause time adjustable?
Yes, it can be set to 100 ms or 200 ms via an internal slide switch.
Q4. How many relays are included?
Two relays:
One for Star contractor
One for Delta contractor
Q5. What prevents relay overlap?
The built-in pause delay ensures a safe transition between star and delta modes.
Q6. How is it installed?
It is mounted on a 35 mm DIN rail for fast integration into control panels.