Overview
The LQ-451 monitors the level of conductive liquids and can be configured to perform any one of the following functions:
- High-Level Alarm
- Low Level Alarm
- Pumping In Control
- Pumping Out Control
Features
- Mains Isolated Electrode Circuit
- Safe Electrode Operating Voltage: 25 Volts (max)
- Relay Output: DPDT
- Relay Contact Rating: 5A @ 240VAC
- DIN Rail Mountable
Operation
Pumping In Control / Low-Level Alarm
The relay in the unit is configured to energise and start the pump motor (or provide a low-level alarm signal) when the water level falls below the lower electrode (P2). The relay will remain on, until the water level reaches the upper electrode (P1).
Pumping Out Control / High-Level Alarm
The relay in the unit is configured to energise and start the pump motor (or provide a high-level alarm signal) when the water level reaches the upper electrode (P1). The relay will remain on, until the water level falls below the lower electrode (P2).
Specifications
| Model | LQ-451 |
| Supply Voltage / Frequency |
230VAC (+/- 10%) / 50 to 60 Hz |
| Electrode Circuit |
25 Vmax (Open Circuit), Mains Isolated via Transformer |
| Ambient Operating Temperature |
-10 to +50 degC |
| Relay Outputs |
DPDT |
| Relay Contact Rating |
5 Amps at 240 VAC (cos ? 1) |
| Modes |
The following modes are selectable using jumpers:
|
| Mounting | DIN Rail Mountable |
| Weight | 300 g |
| Dimensions(mm) | 112(H) x 55(H) x 73(D) |
Ordering Information (Part Numbers)
- LQ-451(HL/PI) - Level Controller (Factory configured for High-Level Alarm and/or Pumping In Control)
- LQ-451(LL/PO) - Level Controller (Factory configured for Low-Level Alarm and/or Pumping Out Control)
