857-354 WAGO, 857-354 Datasheet - Page 11

• Manufacturer Part Number: 857-354
• Description: POWER RELAY, 1CO, 24VDC, 5A, DIN RAIL
• Manufacturer: WAGO

Specifications of 857-354

• Relay Type: Miniature
• Coil Voltage Vac Nom: 24V
• Coil Voltage Vdc Nom: 24V
• Contact Current Max: 6A
• Contact Voltage Ac Nom: 250V
• Contact Configuration: SPCO
• Coil Type: AC / DC
• Coil Current: 8.5mA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Avoiding Analog Signal Corruption
Industrial applications have numerous requirements for safe and efficient signal matching that demand appropriately engineered
solutions. The strength of analog technology is in managing these various signal types. Analog solutions have reliably served all
sectors of the electrical/electronic industry, including factory automation and process control applications.
The 857 Series JUMPFLEX signal conditioners strengthen system safety and eliminate typical problems through continuous galva-
nic 3-way isolation with test voltages of 2.5kV between all channels (input/output/supply).
Potential Difference or Ground Loops
Signal Filtering
Linked Measurement Circuits
Potential differences or ground loops are the most
common cause of analog signal corruptions. As
transmission lengths increase, the ground resistance
also increases, creating potential differences of up to
200V. A ground loop occurs when signals have a
ground reference both at the input and output. This
allows current to flow between the grounds, which
interferes with the actual signal and causes faulty si-
gnal assessment.
In this application example, an isolation amplifier pre-
vents the ground loop. Galvanic isolation between
the input and output circuit disrupts the ground loop,
and allows for perfect signal transmission. Smaller
overvoltages with a lower energy level arising from
switching operations are also safely dissipated. Ad-
ditionally, galvanic isolation protects the PLC or con-
troller downstream of the isolation amplifier.
cal interference or noise, intolerable errors may result
in the electronic control or measurement system. An
internal filter within the input of the isolation amplifier
eliminates disturbances in the process signal. The iso-
lation amplifier can be adapted to the frequency ran-
ge in which the disturbance is found via DIP switches.
The disturbances are thus filtered out safely, and the
signal is transmitted without error to the controller.
Potential differences are often caused by linked
measurement circuits, where the reference voltage is
raised by combining several signals. Isolation ampli-
fiers eliminate this problem, as the galvanic isolation
removes the influence of various reference voltages.
If the signal to be processed is burdened with electri-