AutomationDirect CLICK Series User Manual

Relay Outputs - Wiring Methods
Relay outputs are available for the CLICK PLCs. Relays are best for the following applications:
• Loads that require higher currents than the solid-state outputs can deliver
• Cost-sensitive applications
• Some output channels need isolation from other outputs (such as
when some loads require different voltages than other loads)
Some applications in which NOT to use relays:
• Loads that require currents under 10mA
• Loads which must be switched at high speed or heavy duty cycle
Relay outputs in the CLICK PLCs and modules are available
in two contact arrangements. Form A type, or SPST (single
pole, single throw) type. They are normally open and are
the simplest to use. The Form C, or SPDT (single pole,
double throw) type has a center contact which moves and a
stationary contact on either side. This provides a normally
closed contact and a normally open contact.
Some relay output module’s relays share common terminals,
which connect to the wiper contact in each relay of the bank.
Other relay modules have relays which are completely isolated
from each other. In all cases, the module drives the relay coil
when the corresponding output point is on.
Relay with Form A contacts
Relay with Form C contacts
CLICK PLC Hardware User Manual, 5th Edition, Rev. F – C0-USER-M
3–32
Chapter 3: Installation and Wiring

AutomationDirect CLICK Series Specifications

General

Brand	AutomationDirect
Model	CLICK Series
Category	Controller
Language	English