Echelon i.LON 100 e2 Internet Server - Manual (Page 28)

2-14 Mounting, Cabling and Connections
Digital Inputs
The i.LON 100 server has two optically isolated, polarity sensitive digital inputs
that you can use for monitoring switches and sensors. The supervision of the
inputs is under software control of the i.LON 100 server and its applications.
The digital input connections are implemented on screw terminals 13 through 16.
Input 2 is connected to terminals 13-14 and Input 1 is connected to 15-16. The
digital inputs are polarity sensitive and the (+) and (-) connections for Input 1
and Input 2 are noted adjacent to the terminals. Reversing the polarity of the
digital inputs will cause improper operation of the monitoring circuits and must
be avoided.
i.LON 100 Server Digital Input Screw Terminals
i.LON 100 Server Digital Input Connections
Screw Terminal Enclosure Marking Digital Input
Connection
13 Input 2- - signal from input 2
14 Input 2+ + signal from input 2
15 Input 1- - signal from input 1
16 Input 1+ + signal from input 1
The digital input can be connected to a set of dry contacts or to an active device
output. The +12V < 20mA output can be used to as a voltage source for the
digital input, as shown in the following figure: