device harness wiring layout, t
he EAT device has these I/O options:
•
Two digital inputs. These inputs can switch between either positive or negative polarity, so no relays
are required. As shown in the Device Harness Wiring Layout section, each of the two inputs has two
wire leads, for high (positive) and low (negative). With each input used, both wires must be
connected.
•
One digital output. Digital output provides a negative 200 mA output. Digital output is typically used to
energize a relay coil, or functions such as a buzzer or an LED.
•
One-Wire input and output (one wire for both). One-Wire I/O
is not yet supported by
this device;
therefore, the device’s grey One-Wire lead is not used at this time, but is planned for a later phase of
the product.
The device is capable of sensing
voltage transitions of at least
6 volts
on 12/24 volt systems and
requires 3mA current when voltage is present in the on phase.
The device uses a trigger wire/reference wire setup method for each sensor input. As such, remember
that each input requires two connections to complete each input.
The signal to be monitored should have two voltage states. One with no voltage (i.e. zero volts when
referenced to ground) and another that falls in the range from 6 to 24 volts.
Use the method specified below for trigger and reference wire color connections.
Positive Trigger = Solid wire color input
Reference Wire = Striped wire for ground
Negative Trigger = Striped wire color input
Reference Wire = Solid wire color for +VDC reference voltage
Note: It is important that the voltage signal be tested to ensure it is continuously providing the necessary
voltage and current when in the “on” or “active” position.
Mounting the device
