PROFIBUS-Interface 4 x RTD in Ex i



  • 4 Channels
  • Pt100, Pt1000, Potentiometer, Resistors
  • Ex ia/ib
  • Galvanic isolation
  • LED display
  • Programmable address on front panel


Ex II 2(1)G Ex db e [ia Ga] IIC/IIB Gb
Ex I M2 Ex db e [ia Ma] I Mb
Ex db e [ia Ga] IIC/IIB Gb
Ex db e [ia Ma] I Mb
Class I Zone 1 IIC
A/Ex d e [ia] IIC Gb


Directive 2004/108/EC
Directive 94/9/EC
RoHS 2011/65/EU

Ambient temperature

-25 °C to +60 °C at T4


PTB 97 ATEX 1066 U
TÜV 01 ATEX 1668 (Module)
IECEx PTB 11.0082U
IECEx TUN 11.0028X
CSA 2484303
TC RU C-DE.BH02.B.00005
UL-BR 13.0397U
UL-BR 13.0664X


The MODEX RTD in Ex i module enables an intrinsically safe connection of 4 Pt100, Pt1000, resistors or potentiometers. The inputs are galvanically isolated from each other, from the power supply and from the bus. The module is connected to the process control system via the PROFIBUS-DP. This is also displayed on the module itself using LEDs. Diagnostics data indicating the status of the outputs with respect to a disconnection or short-circuit can also be transmitted in addition to the user data. This is also displayed on the module itself using LEDs.

Technical data *

Protection class Module: IP 66 EN/IEC 60529
Terminals: IP 20 EN/IEC 60529
Terminals with cover: IP 30 EN/IEC 60529
Structure Flameproof, clip-on enclosure for TH 35 rail
Dimensions see data sheet
Material High-quality thermoplastic
Storage temperature -40 °C to +60 °C
Weight 2.1 kg
Measurement range Temperature (Pt 100, Pt 1000): -150 °C to 850 °C
Potentiometer: 500 Ω to 5 kΩ
Resistor: 0 Ω to 5 kΩ
Display LEDs on front panel
Bus status: ON, BF, SF
Inputs: 4 x double LED
LED yellow, sensor aktive; LED red, open circuit/short circuit
Voltage Supply voltage: DC 24 V (20 to 30 V)
Output power 4 W
Power dissipation 4 W (Module)
Bus interface RS 485 with screw terminals
Galvanic isolation Power supply//bus//circuitry//inputs
(also to each other)
Connection 2.5 mm², fine stranded

*Refer to the documentation for more detailed information


Data Sheet - PROFIBUS-Interface 4 x RTD in Ex i

Declaration of Conformity 01-7331-7C0018

Declaration of Conformity 01-7331-7C0029