UMAX180800, 20 Thermocouple, 2 RTD, 4 Inputs, 6 Relays Dual CAN Controller
Version 1
Page: 66-71
6
TECHNICAL SPECIFICATIONS
6.1 Technical Specifications
Specifications are indicative and subject to change. Actual performance will vary depending on the application and operating conditions. Users
should satisfy themselves that the product is suitable for use in the intended application.
All our products carry a limited warranty against defects in material and workmanship. Please refer to our Warranty, Application
Approvals/Limitations and Return Materials Process as described on https://www.axiomatic.com/service/.
6.2 Inputs
Power Supply Input
12V or
24VDC nominal (9…60 VDC power supply range)
Supply Current
158 mA at 12 V Typical
88 mA at 24 V Typical
Protection
Reverse polarity protection is provided.
Power supply input section protects against transient surges and short circuits.
Isolation
Digital isolation is 400VDC from input to ground.
Three-way isolation is provided for the CAN line, inputs and power supply.
Protection
Open circuit detection
Over or under temperature detection
High temperature shutdown detection
Thermocouple Types
Up to 20 channels, independently configurable for B, E, J, K, N, R, S or T
Thermocouple Inputs (20)
The device reads mV signals from the supported Thermocouples.
B = 0 to 13.82 mV
E = -9.835 to 76.373 mV
J = -8.095 to 69.553 mV
K = -6.458 to 54.886 mV
N = -4.345 to 47.513 mV
R = -0.226 to 21.101 mV
S = -0.236 to 18.693 mV
T = -6.258 to 20.872 mV
Temperatures are configured to indicate the SAE J1939 SPN to be transmitted by
that temperature input.
Accuracy: +/- 1°C typical with cold junction compensation at ambient temperature
Resolution: 0.001°C
TC Scan Rate
100ms per channel, total sweep time maximum 2.2 seconds
Common Mode Readings
Input range +/- 2.5V maximum
Rejection is 120db (maximum) at 2.5Vp-p (50-60Hz)
Thermal Drift
4 ppm/°C of span (maximum)
RTD Types
Up to 2 channels for Rt100 sensor type inputs with 2 or 3-wire connection.
Each channel operates independently.
RTD Inputs (2)
The device accepts inputs within the following range of 20 - 400 Ohms.
RTD lead resistance range is 0
– 10 Ohms.
Accuracy: +/- 0.4°C with offset calibration performed at R
RTD
= 100R (typical at
ambient temperature)
Resolution: 0.001°C
RTD Scan Rate
20 samples per second for all 2 channels