HPT-L-C
Bargraph Process Indicator
HPT-L-C dual-loop process indicator with LED numerical and vertical bargraph indication, selectable signal inputs, alarm outputs and two-wire RS485 communication.
- Display range
- −1999 to 9999
- Reference accuracy
- ±0.3% FS
- Input signal families
- Voltage / current / RTD / thermocouple
Supplied by WKSENSOR. Ask us about pricing, availability and delivery.
Product overview
Vertical panel instrument
The tall front window sits above four controls. The black housing extends behind the panel face, with mounting features along its sides.
- Numerical and bargraph indication
- Numerical readouts and a vertical bargraph share the front display.
- Upper and lower alarms
- High and low alarm functions include an adjustable alarm deadband.
- Serial communication
- Two-wire bidirectional RS485 communication uses Modbus RTU.
Input connection references
The following terminal arrangements correspond to the illustrated connection examples. Terminal layouts differ between case formats.
Three-wire Pt100
1: A · 2: B · 3: B.
Thermocouple
2: A+ · 3: B−.
Two-wire transmitter
4: current input + · 5: 24 V excitation + · 3: common −.
| Terminals | Reference |
|---|---|
| 9 / 10 | Normally-open AL2 alarm contact |
| 11 / 12 | N / L in the illustrated mains-powered circuit |
Panel-mount structure
The front bezel and gasket meet the panel, while the retaining bracket secures the case from behind. The terminal cover is at the rear.
- 1 · Front bezel
- 2 · Gasket
- 3 · Panel
- 4 · Instrument case
- 5 · Retaining bracket
- 6 · Terminal cover
Relay contact configurations
| Contact configuration | Resistive-load reference |
|---|---|
| Small contact | 125 V AC / 0.5 A; 24 V DC / 0.5 A |
| Large contact | 220 V AC / 2 A; 24 V DC / 2 A |
Configuration and selection
- Input
- 33 selectable configurations covering voltage, current, RTD and thermocouple signal families.
- Output
- Alarm/control switching types and the analog output versions.
- Power version
- 100–240 V AC/DC or 12–36 V DC. The 24 V excitation output is a separate transmitter supply.
- Communication
- Two-wire RS485 with Modbus RTU and 1200–9600 bps communication.
Technical reference
Specifications and options
| Parameter | Specification or option |
|---|---|
| Model | HPT-L-C |
| Loop configuration | Dual-loop |
| Indication | LED numerical and bargraph display |
| Display range | −1999 to 9999 |
| Reference accuracy | ±0.3% FS |
| Selectable inputs | 33 signal configurations |
| Input signal families | Voltage / current / RTD / thermocouple |
| Alarm functions | Upper / lower alarms with adjustable deadband |
| Switching outputs | Alarm / control switching output; type selectable |
| Analog output options | 4–20 mA / 1–5 V / 0–10 mA / 0–5 V / 0–20 mA / 0–10 V |
| Serial interface | Two-wire RS485; bidirectional |
| Protocol | Modbus RTU |
| Serial framing | 1 start bit / 8 data bits / 1 stop bit; no parity |
| Baud rate | 1200–9600 bps |
| Communication distance | ≤1000 m |
| Mains power version | 100–240 V AC/DC; ≤5 W |
| DC power version | 12–36 V DC; ≤3 W |
| AC frequency | 50 / 60 Hz |
| Transmitter excitation output | 24 ±1 V DC; ≤30 mA |
| Excitation load resistance | ≥750 Ω |
| Operating environment | −10–50 °C; no condensation or freezing |
| Brand | WKSENSOR |
| Product reference | HH-839618477604 |
Application scenarios
Power
Substation equipment and electrical structures.
Water treatment
Treatment basins and access walkways.
Other uses include petrochemicals, metallurgy, oil, chemicals, paper production, food processing, light industry, pharmaceuticals, heat treatment, machinery integration, energy and industrial automation.
