Motor Controllers
Installation & Setup Guide
How to mount and wire the SP-1P complete single-phase smart motor starter into a new or existing motor control panel.
Section: Starter 1-Phase
Safety Requirements
The SP-1P handles live 220V AC on its input terminals. All mains wiring must be performed with the supply isolated and locked off. The SP-1P is a complete motor starter — no existing contactor or overload relay wiring is reused.
Steps
- Switch off and lock out the mains circuit breaker that will supply the SP-1P before making any wiring connections.
- Prove 0V AC at L and N terminals of the incoming supply using a multimeter before connecting wires.
- The SP-1P mains wiring (L, N input and U, N-out to motor) must be performed by a qualified electrician.
- 12V DC and RS485 wiring to the built-in MX-1P module may be handled by a competent technician after the mains is isolated.
- Ensure the supply MCB or fuse rating matches the contactor rating — SP-1P-9 needs a maximum 16A MCB; SP-1P-18 needs a maximum 25A MCB.
Tools Required
Tool Checklist
| Preview | Quantity | Item | Details |
|---|---|---|---|
| × 1 | Flat-Head Screwdriver (5 mm) | For L, N, U mains terminal screws on the SP-1P assembly | |
| × 1 | Flat-Head Screwdriver (3 mm) | For MX-1P RS485 and 12V DC terminal screws | |
| × 1 | Wire Strippers | For preparing 2.5 mm² mains cable and 1.0 mm² control cable ends | |
| × 1 | Multimeter | To verify 0V AC before wiring and voltage levels after power-up | |
| As required | 2.5 mm² Single-Core Cable | For L and N supply input, and U/N motor output connections | |
| As required | RS485 Shielded Twisted-Pair | 1.0 mm² shielded cable for RS485 A/B from built-in MX-1P to gateway | |
| × 1 | Clamp Meter | To measure motor running current during commissioning |
Flat-Head Screwdriver (5 mm)
For L, N, U mains terminal screws on the SP-1P assembly
Flat-Head Screwdriver (3 mm)
For MX-1P RS485 and 12V DC terminal screws
Wire Strippers
For preparing 2.5 mm² mains cable and 1.0 mm² control cable ends
Multimeter
To verify 0V AC before wiring and voltage levels after power-up
2.5 mm² Single-Core Cable
For L and N supply input, and U/N motor output connections
RS485 Shielded Twisted-Pair
1.0 mm² shielded cable for RS485 A/B from built-in MX-1P to gateway
Clamp Meter
To measure motor running current during commissioning
What's in the Box
Included Items
| Preview | Quantity | Item | Details |
|---|---|---|---|
| × 1 | SP-1P Starter Assembly | Pre-assembled contactor + overload relay + MX-1P module in a single DIN rail unit | |
| × 1 | RS485 Terminal Block | 2-position screw terminal for RS485 A and B wiring to gateway | |
| × 1 | 12V DC Input Terminal | 2-position terminal for 12V DC control power supply | |
| × 1 set | DIN Rail Mounting Hardware | DIN rail clip and fixing screws for 35 mm DIN rail | |
| × 1 | Quick Installation Card | Printed wiring diagram — L, N, U, RS485, 12V DC terminal reference |
SP-1P Starter Assembly
Pre-assembled contactor + overload relay + MX-1P module in a single DIN rail unit
RS485 Terminal Block
2-position screw terminal for RS485 A and B wiring to gateway
12V DC Input Terminal
2-position terminal for 12V DC control power supply
DIN Rail Mounting Hardware
DIN rail clip and fixing screws for 35 mm DIN rail
Quick Installation Card
Printed wiring diagram — L, N, U, RS485, 12V DC terminal reference
Removing an Old Starter
When upgrading from an older single-phase starter, the SP-1P replaces the full starter assembly. Remove the old starter power and control hardware rather than wiring the SP-1P in parallel with legacy equipment.
Steps
- Disconnect and remove the previous contactor, overload relay, timer unit, and manual starter controls from the panel before fitting the SP-1P.
- Reuse the incoming mains cable and outgoing motor cable only if conductor size, insulation condition, and terminal lugs remain suitable.
- Do not leave the old starter output connected in parallel with the SP-1P output terminals.
- If the old panel contains additional float switches or pressure switches, rewire them only if they are still required as dry contacts in the new control scheme.
- After replacement, relabel the enclosure and circuit identification so the installation clearly shows the panel is now controlled by the SP-1P smart starter.
Guided Help Center
Isolate the panel and identify the full set of old starter components that will be removed.
Assembly Mounting
The SP-1P mounts on a 35 mm DIN rail inside a distribution enclosure. Ensure the enclosure has adequate ventilation for the motor starter heat output.
Steps
- With the mains supply isolated, mount the SP-1P assembly on the DIN rail — press the clip until it snaps into place.
- The contactor requires adequate air circulation — leave at least 25 mm clearance on each side of the assembly.
- Mount the 12V DC DIN rail power supply adjacent to the SP-1P assembly.
- Route incoming mains cables (L, N from MCB) and motor output cables (to motor terminal box) in separate cable ducts, away from the RS485 and 12V DC wiring.
- Ensure the DIN rail is securely fixed to the enclosure back plate — the SP-1P is heavier than a standard module.
Guided Help Center
Mount the SP-1P onto a secure 35 mm DIN rail inside the enclosure.
Mains & Motor Wiring
The SP-1P has clearly labelled input terminals (L, N) and output terminals (U, N-OUT). The motor connects directly to the output terminals — no additional contactor or overload relay is required.
Steps
- Connect the 2.5 mm² Line (L) wire from the supply MCB to SP-1P terminal L.
- Connect the 2.5 mm² Neutral (N) wire from the supply MCB to SP-1P terminal N.
- Connect the 2.5 mm² motor main winding wire to SP-1P terminal U.
- Connect the motor Neutral (common) wire to SP-1P terminal N-OUT.
- For capacitor-type motors (CSIR/PSC), the capacitor and auxiliary winding remain wired directly inside the motor terminal box — the SP-1P only switches the main contactor. The capacitor is not connected to the SP-1P.
- Set the overload relay FLA dial on the SP-1P to the motor nameplate current (FLA or rated current). The dial is accessible on the front of the assembly — do not set it to the MCB rating.
- Connect 12V DC V+ and V− to the built-in MX-1P module's control power terminals.
- Connect RS485 shielded cable: A core → MX-1P RS485-A, B core → RS485-B. Shield to earth at enclosure earth bar.
Guided Help Center
Connect incoming Line and Neutral from the supply side to the SP-1P input terminals.
Commissioning & First Start
Steps
- Close and latch the enclosure. Restore 12V DC power first — confirm the MX-1P LED on the SP-1P assembly illuminates (green or flashing blue).
- Restore mains supply (close the MCB).
- Complete Gateway Linking before issuing the first start command — see the Gateway Linking guide.
- From the app, tap the motor controller tile → Manual Control → Start. The SP-1P contactor energises with an audible click.
- Measure motor running current with a clamp meter on the Line conductor — confirm it is within ±10% of the motor nameplate current.
- If the motor hums but does not rotate: check the capacitor inside the motor terminal box — on single-phase motors the run capacitor is in the motor, not in the SP-1P.
- If overload relay trips immediately: re-check the FLA dial setting and confirm it matches the motor nameplate current (not the supply MCB rating).