.Brink.Base Modbus Register 4024: Brink exhaust pressure

Technical Definition

The register brink exhaust pressure at address 4024 is used to monitor brink exhaust pressure on the .Brink.Base.

• Protocol: Modbus RTU
• Data Type: S WORD
• Unit: Pa
• Access: Read Only

How to Read (Python pymodbus)

Use this code snippet to read this specific value via RS485:

from pymodbus.client.sync import ModbusSerialClient

client = ModbusSerialClient(method='rtu', port='/dev/ttyUSB0', baudrate=9600)
client.connect()

# Read brink_exhaust_pressure (Address: 4024)
# Note: Check if your device uses 0-based or 1-based addressing
result = client.read_input_registers(address=4024, count=2, unit=1)

if not result.isError():
    print(f"Raw Value: {result.registers}")
else:
    print("Error reading register")

client.close()

Integration (Home Assistant)

Paste this into your configuration.yaml:

- platform: modbus_controller
  name: "brink_exhaust_pressure"
  address: 4024
  value_type: S_WORD
  unit_of_measurement: "Pa"

Connection Diagram

Here is the standard RS485 wiring for this configuration:

graph TD
    PLC[Host Controller / Home Assistant]
    Device[.Brink.Base]

    PLC -- "A+ (D+)" --> Device
    PLC -- "B- (D-)" --> Device
    PLC -- GND --> Device

💡 Engineer's Insight

Analysis: Exhaust air pressure. Unit: Pa (Pascals). Reflects room pressure relative to exhaust.

Troubleshooting: Low/zero may indicate fan issues, disconnected ducting, or uncontrolled air leaks.