Can it drive single-phase 220 V aerators?

Yes. Where every aerator is 220 V single-phase, one board carries 12: each of the three poles in a group feeds one unit. The neutral is taken from the distribution board and never lands on this board. The three units in a group start and stop together, so match them for power.

We have 380 V but no neutral — does that work?

Yes. The board takes no neutral, which suits older installations that only bring in three lives. On three-phase, one group carries one aerator, four aerators per board.

Will the board still act if the gateway goes offline?

Yes. Its three RS485 ports take DO and water-quality probes directly and it starts or stops on local settings without a gateway or 4G. Data is back-reported when the link returns.

How much can the relays switch directly?

Contacts are rated 50 A. Load capability is quoted as 3.5 kW direct; do not work back from 50 A to a power figure. Larger motors should go through an external contactor.

Can it tell that a motor is not turning?

Yes. One CT per phase on every group, 12 in total, compared phase to phase: if one falls close to zero while the other two rise, the group trips as a phase loss and reports it, before the motor burns.

What if the control electronics fail?

Put an insulated tool on the manual lever for that group and close it; the aerator gets power. The last line of defence stays with the operator.

TK-R12-SC4S-BG 12-Channel Controller

Kantangren TAYKEE execution layer · four three-phase groups · runs standalone · manual lever

This board is the high-current execution end of the Kantangren TAYKEE control layer. It is also a local controller that can stand duty on its own: four three-phase groups, 12 outputs, U/V/W in each group switching together, so one board carries four three-phase aerators. Three RS485 ports take DO and water-quality probes directly, so it runs without a gateway and keeps running when 4G drops.

Specification in one line: TK-R12-SC4S-BG gives 4 groups × (U/V/W) = 12 outputs, each group switched by one lever relay, up to 3 kW per channel with contacts rated 50 A. Three-phase 380 V in, no neutral taken. Where every aerator is 220 V single-phase, one pole carries one unit and a single board carries 12.

The real problem on a large farm: inrush

Four 3 kW three-phase motors closing together stack their inrush. At best the voltage sags and the gateway reboots; at worst the branch trips. The board brings its groups in one at a time, at a settable interval (3–6 s is the factory recommendation), so the inrush is spread out, the voltage holds and the gateway is not affected.

Whether the motor is actually turning: 12 CTs

A closed contactor does not mean a running motor. With a lost phase or a jammed impeller the circuit is still live while the motor runs single-phase, and it can burn out in a quarter of an hour. Every group carries one current transformer on each of U, V and W — 12 in total — and the three currents are compared: if one phase falls close to zero while the other two rise, the group trips as a phase loss and reports it. This protects the motor, not just the contactor.

Specifications

Outputs	4 groups × U/V/W = 12 channels, three poles switched together by one lever
Load per channel	up to 3 kW, covering 0.75–3 kW three-phase aerators; larger loads via an external contactor
Contact rating	50 A maximum, electrical life 20,000 operations
Supply	Three-phase 380 V, three wires, no neutral
Single-phase wiring	One aerator per pole, 12 per board; neutral taken from the distribution board, never through this board
Current monitoring	12 CTs for per-phase loss, open phase and three-phase imbalance
Comms	3 × RS485, 9600/8/N/1, default address 40; cascade with the gateway, add boards to add channels
Power	DC 12 V with at least 1 A in reserve, not shared with inductive loads
Emergency	Manual lever on each relay forces the circuit closed if the control electronics fail
Mounting	Inside an IP55 or better cabinet with 50 mm clear above and below; the board itself is not waterproof
Warranty	1 year from the date of manufacture

Sizing: four aerators per board on three-phase, twelve on single-phase

Site	How to size
Three-phase 380 V aerators	Divide the count by four and round up: up to 4 on one board, 5–8 on two
All 220 V single-phase	One board carries 12 (one per pole); the three in a group start and stop together
Automatic control wanted	Add a TK-4G-GW gateway and TK-DO100 probe; this board executes
Feeders	FS2000 and 150D have their own controls and do not use these channels

Never mix three-phase and single-phase loads inside one group — the three poles share a single switch. With all-single-phase wiring the three units in a group start together, so match them for power and duty; that also keeps the three-phase current comparison and imbalance criterion meaningful.

It works with no network: three RS485 ports on board take DO and water-quality probes directly, and the board acts on its own settings — gateway offline or 4G down makes no difference. Attached to a gateway it becomes the gateway's hand, turning remote and cloud decisions into real switching.

FAQ

Can it drive single-phase 220 V aerators?: Yes. Where every aerator is 220 V single-phase, one board carries 12: each of the three poles in a group feeds one unit. The neutral is taken from the distribution board and never lands on this board. The three units in a group start and stop together, so match them for power.
We have 380 V but no neutral — does that work?: Yes. The board takes no neutral, which suits older installations that only bring in three lives. On three-phase, one group carries one aerator, four aerators per board.
Will the board still act if the gateway goes offline?: Yes. Its three RS485 ports take DO and water-quality probes directly and it starts or stops on local settings without a gateway or 4G. Data is back-reported when the link returns.
How much can the relays switch directly?: Contacts are rated 50 A. Load capability is quoted as 3.5 kW direct; do not work back from 50 A to a power figure. Larger motors should go through an external contactor.
Can it tell that a motor is not turning?: Yes. One CT per phase on every group, 12 in total, compared phase to phase: if one falls close to zero while the other two rise, the group trips as a phase loss and reports it, before the motor burns.
What if the control electronics fail?: Put an insulated tool on the manual lever for that group and close it; the aerator gets power. The last line of defence stays with the operator.

TK-R12-SC4S-BG 12-Channel Controller

The real problem on a large farm: inrush

Whether the motor is actually turning: 12 CTs

Specifications

Sizing: four aerators per board on three-phase, twelve on single-phase

FAQ

Further reading