WAGO-I/O-SYSTEM 750
Device Description
13
750-539 4DO 24V DC VALVE Ex i
Manual
Version 1.0.1
3
Device Description
The I/O module 750-539 (4DO 24V DC VALVE Ex i) outputs binary signals to
actuators in Zone 0 and 1 in the hazardous area. Intrinsically safe valves can be
directly controlled. Binary signals are initiated by a higher order control system.
Installation only in zone 2 or in non-hazardous environments!
The installation of the WAGO-I/O-SYSTEM 750 fieldbus couplers/controllers
and I/O modules is only to be done in zone 2 or in non-hazardous environments.
The I/O module has 4 output channels, providing a direct intrinsically safe
connection to 2-wire actuators (e.g., intrinsically safe valves). A coil for a valve
can be connected at each output.
The actuators are connected to the CAGE CLAMP
®
terminals DO 1 and 0 V,
DO 2 and 0 V, DO 3 and 0 V and DO 4 and 0 V.
The assignment of the connections is described in the “Connectors” section.
Connection examples are shown in section “Connecting Devices” > … >
“Connection Example(s)”.
The I/O module outputs provide high-side switching. If the signal status of an
output channel is at “high” the 24 V potential for field power will be switched to
the appropriate output connection.
A green LED indicates the switched status of each channel.
Any configuration of the I/O module is possible within an intrinsically safe
segment when configuring the fieldbus node. An arrangement in groups within the
group of potentials is not necessary.
The I/O module 750-539 can be used with all fieldbus couplers/controllers of the
WAGO-I/O-SYSTEM 750.
The meaning of the LEDs is described in the “Display Elements” section.
The Ex i I/O module receives the 24V voltage supply for the field level from an
upstream Ex i I/O module or from an Ex i power supply module via the power
contacts used as blade contacts. It then provides this potential to subsequent
I/O modules via the power contacts used as spring contacts.
The field voltage and the system voltage are electrically isolated from each other.
