WAGO-I/O-SYSTEM 750
Device Description
13
750-555 4AO 4-20mA
Manual
Version 1.2.1
3
Device Description
The analog output module 750-555 (4AO 4-20mA) generates a standardized
signal of 4 mA … 20 mA for the field area.
The I/O module has 4 output channels, making direct wiring of four 2-wire
actuators possible.
The actuators are connected to CAGE CLAMP
®
connectors AO 1 and common
(ground) or AO 2, AO 3, AO 4 and respective common (ground).
The channels have a common ground potential.
The assignment of the connections is described in the “Connectors” section.
Connection examples are shown in section “Connect Devices” > … >
“Connection Example(s)”.
ΩΩ
Avoid any unacceptable combination of load impedance values!
The output load impedance values for an I/O module must always be situated
within a range of 0
Ω ... 300
Ω
or 300
Ω ... 600
Ω
.
The load impedance values are checked by the I/O module; any unacceptable
combination will result in an error message.
A green status LED indicates the operating status and error-free local bus
communication.
A red error LED indicates a wire break or an unacceptable combination of load
impedance values.
The meaning of the LEDs is described in the “Display Elements” section.
The voltage supply is done via the field supply.
The I/O module 750-555 (4AO 4-20mA) receives the 24 V voltage supply for the
field level from an upstream I/O module or from the fieldbus coupler/controller via
blade-formed power jumper contacts. It then provides these potentials to
subsequent I/O modules via spring-formed power jumper contacts.
Do not exceed maximum current via power jumper contacts!
The maximum current to flow through the power jumper contacts is 10 A.
Greater currents can damage the contacts.
When configuring your system, ensure that this current is not exceeded.
If exceeded, insert an additional supply module.
The Output signal is electrically isolated and will be transmitted with a resolution
of 12 bits.
