Echelon i.LON SmartServer Hardware Manual - page 22
12
Assembling the SmartServer Hardware
Notes: If your external GSM modem requires a carrier detect line, you can attach one end of a
22-gauge (AWG) stranded wire to the carrier detect port on your modem, and then connect the other
end of the wire to pin 1 of the RS-232 console port on the SmartServer.
If you are connecting an external GSM modem that uses a wireless antenna toyour SmartServer, you
must install it at least 1m away from the SmartServer.
If you are attaching an external GSM modem with a separate antenna toyour SmartServer, you should
install the antenna at least 1m away from the SmartServer and its associated wiring. In addition, you
should install the antennas of high-powered modems (1 Watt or greater) outside the housing of any
enclosure.
Connecting M-Bus Devices to the RS-232 Serial Port
You can connect M-Bus devices to your SmartServer using the RS-232 serial port. To do this, you
need to connect a level converter between the RS-232 port of the SmartServer and the M-Bus devices.
This converts the M-Bus signals to RS-232 signals and supplies the M-Bus devices with power
(similar to the LPT-11 Link Power Transceiver).
The class of level converter you should order depends on the number of M-Bus devices you are
connecting to the SmartServer. You can order level converters that can drive anywhere from 3 to 250
devices. For more information and examples of these level converters, go to the following Web sites:
•
www.relay.de
(Level Converter PW3, PW20, PW60)
•
www.stv-automation.de
(BIALON MPW-20 M-Bus)
•
www.hydrometer.de
(HYDRO-CENTER 25, 60, 250)
For more information on the M-Bus, refer to the M-Bus User Group at
www.m-bus.com
.
Connecting Modbus Devices to the RS-232 and RS-485 Serial Ports
You can connect Modbus devices to the to the SmartServer using the RS-232 and RS-485 serial ports.
For more information on the Modbus protocol, go to
www.modbus.org
.
Connecting Devices to the RS-232 and RS-485 Serial Ports with FPM Drivers
You can connect other types of devices (for example, a display) to the SmartServer using the RS-232
and RS-485 serial ports. To connect other types of devices to the SmartServer, you must write a
custom embedded driver, referred to as a Freely Programmable Module (FPM) driver, for your
SmartServer that enables the SmartServer to communicate with the device over the port.
You can create FPM drivers for your SmartServer with Echelon i.LON Programmability Tools. A trial
version of the Echelon i.LON Programmability Tools is available on the i.LON SmartServer DVD. To
build FPM drivers and download them to your SmartServer, you need to order the Echelon i.LON
Programmability Tools DVD (Echelon model number 72120-409). To order this DVD, contact your
Echelon sales representative.
To deploy FPM drivers on your SmartServer, a programmability license must be installed on the
SmartServer. If a programmability license is not pre-installed on your SmartServer, you can order one
(Echelon model number 72161) from the Echelon Web site at
www.echelon.com/products/cis/activate
.
For more information on creating FPM drivers and deploying them on your SmartServer, see the
i.LON Freely Programmable Module User’s Guide.
Digital Outputs
The SmartServer includes two high-voltage, high-current, single pole single throw (SPST) relay
outputs rated at 230VAC @ 10 A or 24VDC @ 10A. The relay connections are implemented on screw
terminals 5–8: Output 1 is connected to terminals 5-6; Output 2 is connected to terminals 7–8. The
SPST relay contacts are polarity-insensitive, and they can be used to switch both AC and DC loads.
The relays require a minimum load of 5V at 5mA in order to avoid low-voltage contact pitting, and
therefore should not be used to switch TTL level signals.