750-841 WAGO, 750-841 Datasheet - Page 264

• Manufacturer Part Number: 750-841
• Description: CONTR.ETHERNET TCP/IP 10/100MBIT
• Manufacturer: WAGO

Specifications of 750-841

• Rohs Compliant: YES
• No. Of Digital Inputs: 10
• No. Of Digital Outputs: 10

7.3.3 Unit categories
7.3.4 Temperature classes
Hydrogen being commonly encountered in chemical plants, frequently the
explosion group IIC is requested for maximum safety.
Moreover, the areas of use (zones) and the conditions of use (explosion
groups) are subdivided into categories for the electrical operating means:
The maximum surface temperature for electrical components of explosion
protection group I is 150 °C (danger due to coal dust deposits) or 450 °C (if
there is no danger of coal dust deposit).
In line with the maximum surface temperature for all ignition protection types,
the electrical components are subdivided into temperature classes, as far as
electrical components of explosion protection group II are concerned. Here the
temperatures refer to a surrounding temperature of 40 °C for operation and
testing of the electrical components. The lowest ignition temperature of the
existing explosive atmosphere must be higher than the maximum surface
temperature.
Unit
categories
M1
M2
1G
2G
3G
1D
2D
3D
Temperature classes
T1
T2
T3
T4
T5
T6
Explosion
group
I
I
II
II
II
II
II
II
Maximum surface
temperature
450 °C
300 °C
200 °C
135 °C
100 °C
85°C
Area of use
Fire-damp protection
Fire-damp protection
Zone 0 Explosive environment by gas, fumes or mist
Zone 1 Explosive environment by gas, fumes or mist
Zone 2 Explosive environment by gas, fumes or mist
Zone 20 Explosive environment by dust
Zone 21 Explosive environment by dust
Zone 22 Explosive environment by dust
Ignition temperature
of the combustible materials
> 450 °C
> 300 °C to 450 °C
> 200 °C to 300 °C
> 135 °C to 200 °C
>100 °C to 135 °C
> 85 °C to 100 °C