CAREL PCO1000BX0 | pCOXS Programmable Temperature Controller

Description

The CAREL PCO1000BX0 is a pCOXS programmable controller with a built-in display, designed for compact HVAC and refrigeration applications. CAREL documentation identifies PCO1000BX0 specifically as the pCOXS main board with an integrated display.

The controller is designed for applications such as chillers, heat pumps, rooftop units, precision air-conditioning equipment and air-handling systems. Its compact I/O architecture provides 6 digital inputs, 4 analog inputs and 5 relay outputs, together with three analog outputs.

The PCO1000BX0 is a legacy/phase-out product. Current product references identify it as discontinued, so it is mainly useful for replacement and maintenance of existing CAREL pCOXS installations.

 

🔹 Product Datasheet

CAREL’s pCOXS documentation specifies the 20–60 VDC / 24 VAC supply, 6 digital inputs, 4 analog inputs, 5 relay outputs and 3 analog outputs. The compact controller occupies approximately eight DIN modules.

 

🔹 Main Features

🌡️ Temperature Control
The controller can process NTC and analog temperature-related signals and use the programmed control logic to manage HVAC equipment.

⚙️ Programmable Controller
Unlike a simple standalone thermostat, the pCOXS provides programmable control logic for complete equipment management.

🖥️ Built-In Display
The BX0 version includes an integrated user interface/display. CAREL identifies PCO1000BX0 as the main board with built-in display.

🔌 Multiple I/O Channels
The controller provides 6 digital inputs, 4 analog inputs and 5 relay outputs, making it suitable for compact equipment-control applications.

📡 Communication Capability
The pCOXS architecture supports communication interfaces including pLAN and other optional communication/network functions depending on the installed configuration.

 

🔹 Operating Procedure — How to Use

1. 🔍 Confirm the complete model number: PCO1000BX0.
2. ⚡ Verify the available power supply before connecting the controller. The specified supply is 20–60 VDC or 24 VAC ±15%.
3. 🧩 Install the controller on the appropriate DIN-rail arrangement or equipment control panel.
4. 🔌 Connect temperature sensors and other analog inputs according to the configured application.
5. 🔘 Connect digital inputs for equipment status, switches, pressure controls or safety contacts as required.
6. ⚙️ Connect relay outputs to the appropriate HVAC actuators, contactors or control circuits.
7. 📈 Connect analog outputs to compatible valves, dampers, speed controllers or other analog-controlled equipment.
8. 🖥️ Apply power and allow the controller to initialize.
9. 🌡️ Check the displayed temperature and input status.
10. ⚙️ Configure the application parameters and verify the equipment operating sequence.
11. ✅ Test heating/cooling, fan, compressor, valve and alarm functions before placing the equipment into normal operation.

 

🔹 Power-Up Sequence

⚠️ The exact sequence depends on the HVAC equipment application program loaded into the controller.

Recommended sequence:

1. 🔌 Confirm all wiring is complete.
2. 🔍 Verify supply voltage and polarity.
3. 🌡️ Check temperature-sensor wiring.
4. 🔘 Check digital-input wiring.
5. ⚙️ Check relay and analog-output wiring.
6. 🧩 Confirm communication cables if installed.
7. ⚡ Apply 24 VAC or the specified DC supply.
8. 🖥️ Check the built-in display.
9. 🌡️ Verify sensor readings.
10. 🔄 Check fan/compressor/valve control outputs.
11. 🚨 Check alarm and protection status.
12. ✅ Place the HVAC equipment into automatic operation.

 

🔹 Shutdown Sequence

1. 🛑 Stop the controlled HVAC equipment through its normal operating command.
2. ❄️ Allow the compressor/fan sequence to complete normally.
3. 🌡️ Confirm the controller shows the expected stopped condition.
4. ⚡ Isolate the controller’s power supply if maintenance is required.
5. 🔌 Disconnect field wiring only after electrical isolation.
6. 🧤 Use ESD precautions when removing the controller.

Do not disconnect the controller while compressor or actuator outputs are operating unless the equipment’s maintenance procedure specifically requires it.

 

🔹 Product Usage

The PCOXS platform was designed for compact HVAC equipment and can be used in:

❄️ Chillers
🔥 Heat pumps
🏢 Rooftop HVAC units
🌬️ Air-handling units
🧊 Refrigeration equipment
🏥 Precision air-conditioning systems
🖥️ Computer-room cooling
🏭 Industrial HVAC systems

CAREL documentation specifically describes pCOXS applications including chillers, heat pumps, small rooftop units, precision air conditioners and air-handling systems.

 

🔹 Input / Output Configuration

🌡️ Analog Inputs — 4

The pCOXS provides four analog inputs. Two are universal inputs supporting signals such as NTC, 0/1 VDC, 0/5 VDC ratiometric and 4–20 mA; two additional inputs support NTC and 0/5 VDC configurations.

🔘 Digital Inputs — 6

Six digital inputs are available for contact-based signals.

⚙️ Digital Outputs — 5

Five relay outputs are available. The pCOXS family also has versions with two additional SSR outputs; the PCO1000BX0 itself should not be assumed to include those SSR outputs.

📈 Analog Outputs — 3

Three analog outputs are provided, including 0–10 VDC and PWM-type outputs depending on the configured output channel.

 

🔹 Common Questions & Answers

Q1: What is CAREL PCO1000BX0?

A: It is a CAREL pCOXS programmable controller with an integrated display, intended mainly for HVAC and refrigeration equipment.

Q2: Is PCO1000BX0 only a temperature controller?

A: No. Although temperature control is an important application, it is a programmable HVAC controller capable of handling multiple analog/digital inputs and outputs.

Q3: What power supply does it use?

A: The documented supply is 20–60 VDC or 24 VAC ±15%, 50/60 Hz.

Q4: Does PCO1000BX0 have a display?

A: Yes. CAREL identifies the BX0 version as the pCOXS main board with a built-in display.

Q5: How many inputs and outputs does it have?

A: The standard pCOXS configuration provides 6 digital inputs, 4 analog inputs, 5 relay outputs and 3 analog outputs.

Q6: What applications use this controller?

A: Typical applications include chillers, heat pumps, rooftop units, precision air-conditioning systems and air-handling equipment.

Q7: Is PCO1000BX0 still manufactured?

A: It is a legacy product. Current product references identify it as discontinued or phased out.

Q8: Can PCO1000BX0 be replaced by another CAREL controller?

A: A direct replacement should not be assumed. The application software, I/O configuration, power supply, communication requirements and display/interface must all be checked.

Q9: What is the difference between PCO1000AX0 and PCO1000BX0?

A: CAREL identifies PCO1000AX0 as the main pCOXS card without a built-in terminal, while PCO1000BX0 includes the built-in display.

Q10: What should I check before ordering a replacement?

A: Check the complete part number, hardware revision, installed application/program, display type, I/O wiring, communication cards and power-supply configuration.

 

🔹 Recommended CAREL Models / Series

1. CAREL PCO1000AX0 | pCOXS Main Controller without Built-In Display
2. CAREL PCO1002BX0 | pCOXS Controller with Built-In Display and 2 SSR Outputs
3. CAREL PCO1002AX0 | pCOXS Controller with 2 SSR Outputs
4. CAREL PCO1MP0BX0 | pCOXS Controller with Built-In Display and Belimo MP-Bus
5. CAREL PCO1MP0AX0 | pCOXS Controller with Belimo MP-Bus
6. CAREL PCOS004850 | RS485 BMS Communication Card
7. CAREL PCO1000WB0 | Ethernet / pCOWeb Interface Card
8. CAREL PCO1000BA0 | BACnet MS/TP / pCOnet Interface Card
9. CAREL IR33 | Universal Electronic Controller
10. CAREL pCO5+ | Programmable HVAC Controller

The PCO1000AX0, PCO1002BX0, PCO1002AX0 and PCO1MP0BX0 are documented members/variants of the pCOXS family, while the PCOS004850, PCO1000WB0 and PCO1000BA0 are examples of CAREL communication options used with the broader pCO controller ecosystem.

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