D2011M G.M. International s.r.l.
GM International

Intrinsically Safe Analog-Temperature Multiplexer Expander DIN-Rail Model D2011M

D2000M series Intrinsically Safe Multiplexing System consists of one to four Analog-Temperature Multiplexer units model D2010M, up to twelve Expander units model D2011M, or up to four Digital Multiplexer units model D2030M, mounted in Hazardous Area/Hazardous Locations Zone 1-2, Gas Group IIC-IIB-IIA T4 or Class I, Division 1-2, Group A, B, C, D T4 and connected via a single/redundant 2 wires data communication/supply line to a Modbus Gateway unit model D2050M, mounted in Safe Area/Non Hazardous Locations and connected to a PLC, DCS or PC. Multiplexer Expander D2011M units can be installed in the field, close to input sensors, for data acquisition of signal from Hazardous Area/Hazardous Locations Zone 0-1-2 or Class I, Class II, Class III, Division 1-2. The units are primarily intended for Hazardous Area/Hazardous Locations acquisition of low level signals from mV, thermocouples, thermoresistances or mA (via external shunt device like D1090Q four channel shunt resistor) sources. D2011M scans all channels using state of the art solid state isolated relays, and stores all data in the D2010M memory buffer connected to it, where they can be rapidly accessed by the Modbus Gateway D2050M unit. Each D2011M unit accepts directly up to 16 input channels. An integrating type, high rejection, high accuracy (18 bits) A/D converter installed on D2010M unit that control up to three Expander D2011M, provides accurate and stable measurements. All parameters are software configurable by serial commands via D2050M Gateway unit and stored in the D2010M unit connected to the Expander.


  • Intrinsically Safe for installation in Zone 1, 2 Gas Group IIC, IIB, IIA T4 or Class I, Division 1, 2 Groups A, B, C, D, Temperature Code T4 and Class I, Zone 1, 2 Groups IIC, IIB, IIA, Temperature Code T4 Hazardous Area/Hazardous Location.
  • Universal inputs (mV, TC, RTD) from Zone 0, 1, 2 or Class I, II, III, Division 1, 2, Groups A, B, C, D, E, F, G, and Class I, Zone 0, 1, 2 Groups IIC, IIB, IIA Hazardous Location.
  • Isolation of 200 V input to input (mV or TC), 60 V input to input (RTD) and 500 V input to ground, allows grounded sensors.
  • EMC Compatibility to EN61000-6-2, EN61000-6-4.
  • High reliability, SMD components.
  • High density, 16 channels per unit.
  • 1 terminal block per input, no external terminal block required.


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Technical Data


Voltage via D2010M multiplexer unit.
Max. power consumption 10 mW.


Type millivolt or thermocouple type A1, A2, A3, B, E, J, K, L DIN, L GOST, N, R, S, S GOST, T, U or 3-4 wires RTD Pt100, Pt200, Pt300 to DIN43760, Pt100 (0.3916), Ni 100 or Pt100, Pt50, Cu100, Cu53, Cu50, Cu 46 (GOST) or mA signals with external shunt (D1090Q) or V signals with external divider (D1094Q).
Input channels 16 for mV, RTD or TC without automatic reference junction compensator or 15 using automatic reference junction compensator for thermocouples inputs (channel 16 is used for compensator connection).
Resolution 2 μV on mV or thermocouple, 10 mΩ on RTD.
Input range within sensor’s rated limits; mV range from - 21 to + 80 mV or - 21 to + 21 mV, resistance range from 0.0 to 400.0 Ω.
Measuring RTD current ≤ 200 μA.
RTD line resistance compensation ≤ 10 Ω.
Thermocouple reference junction compensation automatic with external sensor on channel nr. 16 (OPT2091 separately ordered or user selectable RTD) or fixed programmable from - 60 to + 100 °C.
Burnout up, down or disabled.


Type field units powered by D2010M multiplexer at 23 ± 1 °C ambient temperature.
Calibration and linearity accuracy ≤ ± 20 μV on mV or thermocouple, 200 mΩ on RTD or ± 0.05 % of input value, whichever is greater.
Temperature influence ≤ ± 2 μV, 10 mΩ or ± 0.01 % of input value for a 1 °C change.
Ref. Junction Compensation influence ≤ ± 1 °C (thermocouple sensors only).


Test Voltage I.S. In/I.S. In 200 V for mV/TC, 60 V for RTD; I.S. In/Ground 500 V;

Environmental conditions

Operating temperature limits – 40 to + 60 °C, relative humidity max 90 % non condensing, up to 35 °C.
Storage temperature limits – 45 to + 80 °C.

Safety description

Safety parameters Uo/Voc = 10.7 V, Io/Isc = 7 mA, Po/Po = 19 mW at terminals 1-2-3-4 of channel 1 to 16. -40 °C ≤ Ta ≤ 60 °C.


Type T35 DIN Rail according to EN50022.
Weight about 640 g.
Connection by polarized plug-in disconnect screw terminal blocks to accomodate terminations up to 2.5 mm2.
Location Safe Area/Non Hazardous Locations or Zone 1, 2, Group IIC, IIB, IIA T4, Class I, Division 1, Groups A, B, C, D Temperature Code T4 and Class I, Zone 1, 2, Group IIC, IIB, IIA T4 installation.
Protection class IP 20.
Dimensions Width 127 mm, Length 220 mm, Depth 78 mm.

Data Sheet

Datasheet of D2011 ( EN )

Instruction Manual

EAC Passport of D2011 ( RU )
Instruction Manual D2000 Series ( EN | CN )

Declarations of Conformity

EU Declaration of Conformity for D2000 series ( EN | IT )
EU Declaration of Conformity for RoHS, ASBESTOS. ( EN )




SWC2090 - D2000M Software Configurator for Windows ( EN )
Instruction Manual D2000 Series ( EN )