Instruction manual
and RS-485 serial ports, and use a custom dr iver for co mmunication between the SmartServer and the
devices over the RS-232 or RS-485 serial interfaces.
You can create custom drivers for your SmartServer with Echelon SmartServer P rogr amming Tools.
A de mo vers ion of the E chelon SmartServer Pr o grammi ng T oo ls is available on the SmartServer 2.2
DVD. To build custom drivers and deploy them on your SmartServer, order the Echelon SmartServer
Programming Tools DVD. To order this DVD, contact your Echelon sales representative.
In addition, a programmability license must be installed on the SmartServer to deploy custom drivers
on it. If a programmability license is not pre-installed on your SmartServer, you can order one
(Echelon model number 72161) from t he Echelon or your Echelon product distributor.
For more information on creating custom drivers and deploying them on yo ur SmartSe rver, se e the
SmartServer 2.2 Programming Tools User’s Guide.
Digital Outputs
The Smart S erver includes t wo high-voltage, high-current, single pole single throw (SPST) relay
outputs rated to switch resistive loads at 230VAC @ 10A or 24VDC @ 10A. For switching inductive
loads, see below. The relay connections are implemented on screw terminals 5-8: Output 1 is
connected to terminals 5-6; Output 2 is connecte d to terminals 7-8. The SPST relay contacts are
polarity-i ns ensitive, and they can be used to switch both AC and DC loads. The rela ys req uire a
minimum load of 5V at 100mA in order to avoid low-voltage contact pittin g, and t herefore require a
parallel lo a d resistor to switch TTL level signals.
Each of the rela y o utputs is contro lle d by a Digital Output application on the SmartServer. The relays
can be triggered by the Digital O utp ut ap plications or b y the receipt of remote messages. See Chapter
9 of the SmartServer 2.2 User’s Gui de fo r confi guring the SmartServer to use the di gital outputs to
which it is connected.
The following figure illustrates the locatio n of the relay output screw terminals on the SmartServer .
The following table lists the enclosure markings for the relay output scre w terminals on the
SmartServer and their connection type.
Screw Terminal
Enclosure Marking
Relay Connection
5
Output 1
Relay output 1
6
Output 1
Relay output 1
7
Output 2
Relay outp ut 2
8
Output 2
Relay output 2
SmartServer 2.2 Hardware Guide 13