This article aims to provide assistance during the setup of 61F series Floatless Level Switch.
Please refer to the datasheet when following steps in this article, various models have differing pin arrangements therefore, incorrect wiring may result in damage to the unit.
Please click here to download the datasheet.
Basic Checklist
Power Supply Wiring
The terminals to wire the power supply to, differ depending on the model number. Select the appropriate model to view the terminal arrangements.
11 Pin AC Models
8 Pin AC Models
11 Pin DC Models
Electrode Wiring
The terminals to wire the electrodes to differ depending on the model of controller you have, please refer to the correct model when checking the electrode wiring. All examples below are for a standard 3 probe system.
8 Pin Models
The example wiring below is for a 61F-LS-CP08-N. While the terminal arrangement is the same between -N, -A, and -S models, the internal circuitry differs. For -A models, terminals 8 and 7 are normally closed. These differences are explained further on page 5 of the datasheet.
11 Pin Models
AC Models
The example wiring below is for a 61F-LS-CP11-N. While the terminal arrangement is the same between -N, -A, and -S models, the internal circuitry differs. For -A models, terminals 8 and 7 are normally closed. These differences are explained further on page 5 of the datasheet.
DC Models
Checking the Output Relay
Please refer to the table below to check the state of the output relay under varying conditions. Further explanation of this can be found under the Troubleshooting Example in the next section.
Troubleshooting example
We can quickly identify if the unit is faulty by only supplying power to the unit. Follow the wiring diagram under Checking the power supply, and remove all other wires from the controller including wires from the electrodes, and wires to output relay, then follow the steps below.
You can simulate a change in water level by using a piece of wire or a clip, and creating a short circuit between the electrode terminals. By closing and opening the circuit you can compare it with normal operating behavior. (Do not short circuit the power supply terminals).
Comparing the state of the output relay, against the short conditions between electrodes, will tell us if the level controller is behaving as expected.
The following example is for the 61F-LS-CP08-N providing automatic water supply control.
Circuit Diagram
Principle of Operation
1. Upon power on, the LED indicator will blink three times, then turn off.
2. With no short between electrodes, you should expect to see continuity between terminals 4 and 2 of the level controller (Output relay). The LED indicator will be off.
3. Now short between terminals 1 and 8, continuity will remain between terminals 4 and 2, and the LED indicator will remain off.
4. With terminals 1 and 8 shorted, continue to short terminals 8 and 7, you should expect to see that terminals 4 and 2 are now open, and continuity exists between 4 and 3. The LED indicator will now turn on.
5. Removing the short between terminals 8 and 7, and leaving terminals 1 and 8 shorted. The LED indicator should remain lit, and continuity should remain between terminals 4 and 3.
6. Finally, remove the short between 1 and 8. Terminals 4 and 3 will now be open circuit and continuity will return to terminals 4 and 2. The LED indicator will now turn off.
If the level controller behaves as stated in the steps above, then the controller is healthy and the fault may lie with either the wiring to the probes, or the output wiring to the pump.
If you see the LED indicator changing state but continuity does not change between terminals 2, 3, and 4. We can conclude the output relay is faulty.
If you do not see any change to the LED indicator or output relay, then the unit is faulty.