# PT100 Amplifier Board

Dyze Design PT100 Amplifier Board

# What's included

Item Quantity
PT100 Analog Amplifier PCB 1
Sensor cable 1

# What’s required

WARNING

This PT100 Amplifier board is not compatible with DUET boards. To use PT100 sensors with DUET boards and RepRap firmware, you need to buy DUET PT100 daughter boards (opens new window).

# Specifications

Features Specification
Compatible firmware Marlin 2.0.9.4 (or above)(https://github.com/DyzeDesign/Marlin/releases/latest (opens new window))

# Electrical Specifications

Parameter Condition Min Typical Max Unit
Power supply (Vcc) Controller logic voltage: 3.3V - 3.3 - V
Controller logic voltage: 5V - 5 - V
Current consumption 0.5 - 1.5 mA
Output Tension (Vout) 0.15 - Vcc-0.15 V

# Output voltage lookup table

Temperature (°C) PT100 value(Ω) Output voltage (V) @ 3.3V Output voltage (V) @ 5V
0 100 0.8822 1.3367
20 107.794 0.9497 1.4389
40 115.541 1.0165 1.5401
60 123.242 1.0827 1.6405
80 130.897 1.1484 1.7400
100 138.505 1.2135 1.8387
120 146.068 1.2780 1.9364
140 153.584 1.3420 2.0333
160 161.054 1.4054 2.1294
180 168.478 1.4683 2.2246
200 175.856 1.5305 2.3190
220 183.188 1.5923 2.4125
240 190.473 1.6535 2.5052
260 197.712 1.7141 2.5971
280 204.905 1.7742 2.6882
300 212.052 1.8338 2.7784
320 219.152 1.8928 2.8679
340 226.206 1.9513 2.9565
360 233.214 2.0093 3.0443
380 240.176 2.0667 3.1314
400 247.092 2.1236 3.2176
420 253.962 2.1801 3.3031
440 260.785 2.2360 3.3878
460 267.562 2.2913 3.4717
480 274.293 2.3462 3.5549
500 280.978 2.4006 3.6373

# Installation / Mounting

You can refer to this drawing for easy mounting in your printing environment:

Dyze Design PT100 Amplifier Board Drawing

# Wiring

Dyze Design PT100 Amplifier Board Wiring Reference

TIP

Multiple PT100 amplifier boards can be connected together (daisy-chained). Simply insert the male daisy chaining connectors (J1) inside the female daisy chaining connection (J2) of your other PT100 amplifier board.

# Power supply selection

  • The power supply should be chosen according to the logic tension of your controller.
  • If you are daisy chaining more than one PT100 Analog Amplifier, only the first one should be connected to Vcc. For the other, connect only the signal pin (blue wire). If you have ground pins available near the analog inputs on your board, you can connect those too.

# PT100 Sensor Connection

  • The PT100 Sensor must be connected to connector J3
  • The connector mate with a PH3-3 connector from JST Sales Amarica Inc. or a standard dupont connector with a pitch of 100MIL.

# Controller Board Connection

Cable Color Connection
Red Vcc
Blue Signal
Black GND

Dyze Design PT100 Amplifier Board Cable Schematic

  • Connect Vcc wire to 3.3V or 5V depending on the logic tension use by your controller
  • Connect the GND wire to a GND pin
  • Connect the Signal wire to an analog input.

WARNING

Make sure not to use a thermistor input, since those pins usually have a pullup resistor and will not work with the PT100 Analog Amplifier

# Example for RAMPS 1.4

Ramps 1.4 board connection example for Dyze Design PT100 Amplifier board

Signal input pins for RAMP 1.4 :

  • A3
  • A4
  • A5
  • A9
  • A10
  • A11
  • A12

# Firmware

# Marlin Firmware

The PT100 Analog Amplifier is supported by the official distribution of Marlin since release 2.0.9.4

# Configuration.h

Configure the temperature sensor (lines 540-553):

#define TEMP_SENSOR_0 68

Add the following line to specify the pin use for the signal:

#define TEMP_0_PIN A3

# Maintenance

No maintenance required

Last Updated: 6/6/2022, 2:04:49 PM