16
Assembling the SmartServer Hardware
14
Input 2+
+ Signal from input 2
15
Input 1-
- Signal from input 1
16
Input 1+
+ Signal from input 1
You can connect the digital inputs on the SmartServer to a set of dry contacts, or to an active device
output. The +12V < 20mA screw terminals (19–20), which are described in the next section, can be
used as a voltage source for the digital inputs. The following figure demonstrates this configuration.
Note that in this figure the connection between screw terminals 16 and 20 does not include screw
terminal 19, as it is connected to the active device.
+12V < 20mA Output
The SmartServer contains one +12VDC outlet that can provide up to 20mA. The +12V <20mA output
is implemented on screw terminals 19 and 20. Screw terminal 20 is the +12V <20mA connection.
Screw terminal 19 is the system ground.
You can connect the +12V <20mA output on the SmartServer to a set of dry contacts in order to power
an active device that is connected to the digital input screw terminals.
The following figure illustrates the location of the 12V <20mA output screw terminals on the
SmartServer.
+12V <20mA Output
Digital Input Connectors
