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SS3018 - 8ch mV - Tc Modbus RS-485 IO Module

The SS3018 IO Module is able to acquire up to 8 analog input signals, data values are transmitted with MODBUS RTU/ASCII protocol on the RS-485 network (RS232 interface is available.)

SKU SS3018 Categories ,

£191.00 ex VAT

Available on back-order


The SS3018 IO Module is able to acquire up to 8 analogue input signals. Data values are transmitted with MODBUS RTU/ASCII protocol on the RS-485 network (RS232 interface is available.)

Connect Thermocouples or up to +/- 1V voltage signals. The Cold Junction compensation for thermocouples is performed internally. The 16 bit converter guarantees high accuracy and stable measurements versus time and temperature. Furthermore, to ensure safety, two Watch-Dog timer alarms are provided.
The 2000 Vac isolation between input, power supply and serial line removes eventual ground-loop effects. This allows you to use the device in heavy environmental conditions.
The SS3018 is compliant with the 89/336/EEC directive on electromagnetic compatibility. The device is housed in a rough self-extinguishing plastic container. Additionally, with its thin profile of only 17.5mm, you can mount the device on a high density EN-50022 standard DIN rail.

The SS3018 is designed to work with the MODBUS RTU/ASCII protocol: standard protocol in field-bus. Furthermore, you can directly interface SS3000 series devices to most PLCs and SCADA applications available on the market.

Product Details

  • Field-Bus remote data acquisition
  • RS-485 Master/Slave communication type
  • 8 channel input
  • Up to +/- 1V and Tc configurable input
  • Watch-Dog Alarm
  • Remotely Configurable
  • 2000 Vac 3-way Galvanic Isolation
  • High Accuracy
  • EMC compliance – CE mark
  • DIN rail suitable mounting – EN-50022 compliance

For more information and protocol instructions, please see the Specifications Sheet and User Guide.


Typical @ 25°C and in the nominal conditions

Voltage Input 25mV: -25 to +25 mV
100mV: -100 to + 100 mV
250mV: -250 to +250 mV
1000mV: -1000 to +1000 mV
Thermocouple J: -210 to +1200 °C
K: -210 to +1372 °C
R: -50 to +1767 °C
S: -50 to +1767°C
B: +400 to +1825 °C
E: -210 to +1000 °C
T: -210 to +400 °C
N: -210 to +1300 °C
Input Calibration ±0.05 % or 5µV f.s.
Pot.: ±0.05 % f.s.
Linearity mV ±0.1 % f.s.
Tc ±0.2 % f.s.
Cold Junction Compensation ±0.5 °C
Input Impedance mV,Tc >1MΩ (10MΩ pull-up resistor)
Thermal Drift ±0.005 % / °C f.s.
CJC Thermal Drift ±0.02 °C/ °C f.s.
Lead wire resistance influence mv,Tc <0.8µV/Ω f.s.
Rise Time 0.5 to 2 sec
Data Transmission Baud Rate: 38.4 Kbps
Max Distance: 1.2 Km
Warm-up Time 3 min.
Power Supply Voltage 10 to 30 Vdc
Power Supply Current Consumption 30 mA @ 24 Vdc
Power Supply Polarity Inversion Protection 60 Vdc max
Isolation Input - RS485: 2000 Vac 50 Hz, 1 Min.
Supply - Input: 2000 Vac 50 Hz, 1 Min.
Supply - RS485: 2000 Vac 50 Hz, 1 Min.
Operating Temperature -10 to +60 °C
Storage Temperature -40 to +85 °C
Humidity (non condensing) 0 to 90 %
Housing Material Self-extinguishing plastic
Mounting EN-50022 DIN rail
Weight ∼ 150 g
EMC EN 61000-6-2
EN 61000-6-4
IOlog SS3018 Specifications

IOlog SS3018 User Guide