Liquid level >

TNDG20 / TNDA20 · LIQUID LEVEL CONTROL FOR WELL AND TANK

TNDG20 - TNDA20 LIQUID LEVEL CONTROL FOR WELL AND TANK

Description
Especifications

TNDG20 / TNDA20 level relay for well and tank: fills the tank and stops the pump if the well runs dry. 230/400 VAC, 1 x SPDT 8A.

Product type:	Conductive probe level relay
Installation:	Plug-in relay on 11-pin socket
Function:	Tank filling with well protection
Models:	TNDG20 · TNDA20

Features

✓Monitors the well and the tank at the same time with a single unit
✓The pump stops if the well runs dry: no dry running
✓Adjustable sensitivity: also for low-conductivity water
✓Status LEDs for each probe, the output and the supply
✓Plug-in relay on an 11-pin socket: replaced without touching the wiring

Supply

230 / 400 VAC

Output

1 x SPDT 8A

Sensitivity

50 – 150 kΩ

Connection

11-pin socket

Documentation

Datasheet (PDF in Spanish)Request information Custom unit

How it works

1When the water in the tank drops below the minimum probe, the output starts the pump.
2The pump stops when the water in the tank reaches the maximum probe.
3If the well drops below its minimum probe, the pump stops even if the tank is not full.
4The pump does not restart until the well reaches its maximum probe.

You may also be interested in

TNS020Well or tank only YND060Well and tank on DIN rail SNP003Set of 3 level probes

ZB11-011-pin socket for DIN rail

Frequently asked questions

What is the difference between the TNDG20 and the TNDA20?

The TNDG20 uses a single probe common for well and tank; the TNDA20 has one common for each, for an independent well and tank.

Which probes does it need?

Two sets of 3 conductive probes, one for the well and one for the tank, for example the SNP003.

Which socket does it use?

An 11-pin socket: the ZB11-0 for DIN rail or the TBEU1E in-line socket.

General information

References	TNDG20 · TNDA20 (230 / 400 VAC)
Series	T · plug-in relay
Product type	Conductive probe level relay
Function	Tank filling with well protection

Electrical specifications

Supply	230 / 400 VAC · 50/60 Hz
Output	1 x SPDT 8A 250 VAC

Probe inputs

Sensitivity	Adjustable from 50 to 150 kΩ
Inputs	Well maximum and minimum · tank maximum and minimum
Common	TNDG20: single · TNDA20: double

Housing and mounting

Format	90 × 80 × 36 mm
Connection	11-pin socket: ZB11-0 (DIN rail) or TBEU1E (in-line)
Material	Grey polycarbonate UL94-V0
Weight	≈ 170 g

Environmental conditions

Operating temperature	−10 to +55 °C
Storage temperature	−25 to +85 °C

Standards and certifications

Compliance

CE · 2014/35/EU · 2014/30/EU

Models and references

Reference	Use	Probe common	Supply	Connection
TNDG20	Well and tank with single common	Single (terminal 7)	230 / 400 VAC	11-pin socket
TNDA20	Independent well and tank	Double (well 7 · tank 9)	230 / 400 VAC	11-pin socket

Accessories

ZB11-0 · 11-pin socket for DIN rail · TBEU1E · 11-pin in-line socket

Wiring: function of each terminal

Terminal	TNDG20	TNDA20
1	Output common	Output common
2	Supply (with 10 or 11)	Supply (with 10)
3	Output 1-3: closed with the pump stopped	Output 1-3: closed with the pump stopped
4	Output 1-4: closed with the pump running	Output 1-4: closed with the pump running
5	Well maximum probe	Well maximum probe
6	Well minimum probe	Well minimum probe
7	Probe common (well and tank)	Well probe common
8	Tank maximum probe	Tank maximum probe
9	Tank minimum probe	Tank probe common
10	Supply 230 VAC (with 2)	Supply 230 VAC (with 2)
11	Supply 400 VAC (with 2)	Tank minimum probe