IAI America TT-C3 - Manual (Page 58)

48
INTELLIGENT ACTUATOR
Chapter 1 Installation
3.
Installation
Environment,
Noise
Measures
and
Other
[2] DC solenoid valve, magnet switch, relay
Measure --- Install a diode in parallel with the coil. Determine the diode capacity in accordance with
the load capacity.
The above noise elimination measures are particularly important when a 24-VDC relay is driven
directly by a controller output and there is also a 100-VAC solenoid valve, etc.
Reference Circuit Diagram
Diode
In a DC circuit, connecting a diode in reversed polarity will
damage the diode, internal parts of the controller and DC
power supply. Exercise due caution.
Controller
Surge absorber
Solenoid valve
100 VAC