10
Notes and warnings
PRC-E Series Instruction Manual
MN014003EN August 2015 www.eaton.com
Digital inputs
The controller includes 8 digital inputs (DI 1-8). A dry-
contact is placed between the input connection point and
one of the ground (GND) connectors. There is a 5 Vdc
wetting voltage on these inputs. The input can be defined
at startup in a variety of maintained and momentary contact
configurations. The configuration is dependent upon the
type of closure wired to the input.
The above is a schematic illustration showing two
types of dry-contact inputs. Notice there is no control
voltage, merely a simple switch closure. 18 AWG wire
is recommended with a 500 foot maximum.
The above schematic illustrates an occupancy sensor
with relay output connected to a digital input. The sensor
can be powered from the controller, as shown, from the
12 Vdc 500 mA maximum power supply connection within
the controller or from an external power source. Reference
PRCE Input/Output drawing for field devices.
Universal inputs
Universal input points can be defined as digital input
points or as analog input points. If used as a digital input
point, a dry contact should be placed between the input
point and the common point on the connector. There is a
12 Vdc wetting voltage on these inputs. The input can be
defined in a variety of maintained and momentary contact
configurations. If used as an analog input point, the input is
a 0–10 Vdc input. The input is defined at commissioning for
the required function and conversion of engineering units.
The above schematic demonstrates the use of the digital
component of the universal input.
The above schematic illustrates a 0–10 V analog level photo
sensor connected to a universal input. Reference PRCE
Input/Output drawing for field devices.