WAGO 750 Series User Manual

220 • Use in Hazardous Environments
Classification Meeting CENELEC and IEC
WAGO-I/O-SYSTEM 750
Linux Fieldbus Coupler
11.3.2 Explosion Protection Group
In addition, the electrical components for explosive areas are subdivided into
two groups:
Group I: Group I includes electrical components for use in fire-damp
endangered mine structures.
Group II: Group II includes electrical components for use in all other
explosive environments. This group is further subdivided by
pertinent combustible gases in the environment.
Subdivision IIA, IIB and IIC takes into account that
different materials/substances/gases have various ignition
energy characteristic values. For this reason the three sub-
groups are assigned representative types of gases:
IIA – Propane
IIB – Ethylene
IIC – Hydrogen
Tab. 11-1: Minimal ignition energy of representative types of gases
Minimal Ignition Energy of Representative Types of Gases
Explosion group I IIA IIB IIC
Gases Methane Propane Ethylene Hydrogen
Ignition energy (µJ) 280 250 82 16
Hydrogen being commonly encountered in chemical plants, frequently the
explosion group IIC is requested for maximum safety.

WAGO 750 Series Specifications

General

Protection Class	IP20
Bus Couplers	PROFIBUS, CANopen, Ethernet
Modules	Digital Input, Digital Output, Analog Input, Analog Output
Mounting	DIN rail mounting
Voltage Supply	24 V DC (typical)
Communication Protocol	Depends on the bus coupler (e.g., PROFIBUS, CANopen, DeviceNet, Ethernet)
Digital Input Channels	Varies by module (e.g., 8, 16 channels)
Digital Output Channels	Varies by module (e.g., 8, 16 channels)
Analog Input Channels	Varies by module (e.g., 2, 4, 8 channels)
Analog Output Channels	1, 2, 4 channels (depending on module)
Width	12 mm, 24 mm (typical module widths)
Number of Channels	Varies by module type
Current Consumption per Channel	Varies by module type