verified connector library

Aplisens PCE-28/PRE-28 Modbus pressure transmitter

Register map(s) for this device, each at the trust rung it earned. Addresses are 0-based as on the wire; word order and scaling are only confirmed at the hardware-verified rung.

interop-verified

Read + decoded cleanly over a real network vs an independent third-party Modbus test server (transport and framing; reads are remapped into the server's register window, so the map's own addresses are NOT exercised). Does NOT prove word order/scaling against the actual device.

pointaddress (0-based)typescaleunit
user_value_percent0F32BE1%
pressure_sensor_12F32BE1Pressure unit
pressure_sensor_24F32BE1Pressure unit
temperature_sensor_16F32BE1°C
cpu_temperature8F32BE1°C
temperature_sensor_210F32BE1°C
user_value_percent_int16I160.01%
pressure_sensor_1_int17I160.01Pressure unit
pressure_sensor_2_int18I160.01Pressure unit
temperature_sensor_1_int19I160.01°C
cpu_temperature_int20I160.01°C
temperature_sensor_2_int21I160.01°C
pressure_unit22U161
upper_sensor_limit24F32BE1Pressure unit
lower_sensor_limit26F32BE1Pressure unit
damping_value28F32BE1s
response_delay_value30U161ms
modbus_address31U161
status_register35U161

link settings as documented (unverified): RTU; default 9600 8E1; unit ID 1; FC 03,43,100,101,102,103,104,105; Supports broadcast mode for functions 101, 102, 103, 104, 105.

⚠ Warning to proceed strictly in accordance with the information contained in the documentation in order to ensure the safety and full functionality of the device. — Starkest reads only; we never write a control register.

bench facts as documented (unverified)
terminalsInternal electrical switching terminals suitable for conductors with cross-section from 0.5 to 2.5 mm2
A/B polarityPM12: 2 (+), 3 (-/GND), 4 (A+), 5 (B-). PKD/SG: Red (+), Black (-), Blue (A+), Yellow (B-). PZ: 1 (+), 2 (-), 4 (A+), 3 (B-).
terminationNot integrated with termination resistors as standard. PCE-28.Modbus16 and PRE-28.Modbus16 with PZ/PZ4 have a 560 ohm resistor switchable via DIP switch.
connectorPM12, PKD, SG, PZ, PZ4
isolationNo galvanic isolation; common voltage level should be equalized by connecting negative poles together.
shield/groundConnect screen on one side at the transmitter's power supply point.
response timeout5 ms
broadcastsupported
protocol notesSilent interval between characters must not exceed 1.5T. Silent interval before response must not be shorter than 3.5T.
model register0x0020
serial register0x0020
firmware registerSoftware revision in configuration mode
FC 43 device IDsupported
powerModbus standard: 4-28 V DC. Configuration standard: 5-28 V DC. Exi version: 4-10 V DC or 10.5-15.8 V DC depending on model. Current < 3.6 mA to < 24 mA.
environmentAvoid mechanical impacts, excessive shocks/vibration, excessive temperature fluctuation, water vapor condensation, dusting, icing. Min ambient temperature -40°C (-50°C special version).
accuracyIndication error: 0.2% +/- 1 digit
certificationsATEX, IECEx, CE
doc revisionRevision 03.A.001
firmware applicabilityVersion 18 of the transmitter firmware

generated by gemini:gemini-3.5-flash · harvested from https://aplisens.com/pdf/produkty/EN.IO.PCE.PRE.28.MODBUS.Revision.03.A.001.pdf (Aplisens); manual-faithful — the document's claims, panel risk: LOW — panel concurs, no field disagreements; proved interop-verified on 2026-06-10 · recorded 2026-06-10

The trust ladder

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