User guide

Configuring RI Power
Chapter 18 Configuring Power Over the Serial Ports 81
Configuring RI Power
RI Power In
Ring Indicator (RI) power in accepts power into the Digi device server only on port one. Power in is available
using the RI pin. The Digi device requires power in the of range 9-30 VDC @ 525mA (max). Ports 2, 3, and 4
can still supply power to a serial device through the RI or DTR pins for each port. When using power in through
the RI, the external power supplies (both powered Ethernet and the barrel connector power supply) are
inoperative. Altpin will not work for RI power in.
1. Open the device unit enclosure and move the black jumpers to the following settings:
P-9 jumper on pins 2 and 3
P-6 jumper on pins 1 and 2
2. Close the device unit enclosure.
RI Power Out
Ring Indicator (RI) power out is available on all ports. The total power budget for this feature is one (1) watt not
to exceed 5 volts @ up to 200mA on any single port. The following procedure assumes the unit will only be used
for RI power out.
1. Set the port DIP switches to the following places: switch 1 and 3 are up and 2 and 4 are down (see "Serial
Power Table" on page 82 for illustration).
2. Enable the RI power through the web interface.
3. Connect power supply with the barrel-connector power supply provided with the device or use powered
Ethernet.
Note If the unit will be used with RI power in (port 1 only), set the jumpers to the settings listed below
P-9 jumper on pins 2 and 3
P-6 jumper on pins 1and 2
and do not use an external power source. Port 1 cannot be used for both power in and power out.
Configuring DTR Power
Power Out
Data Terminal Ready (DTR) power out is the factory default on the Digi device server. Total power budget for
this feature is one watt not to exceed 9 volts @ up to 100mA to any single port.
1. Set the port DIP switches to EIA 232 (switch 1 is up, 2,3, and 4 are down) to enable DTR power.
2. Open the port and set DTR high.
Note
The pins face each other on the board. That is P-9 pin
1 is straight across from P-6 pin 3. When the jumpers
are placed correctly for power in, the jumpers will set
on the pins closest to the edge of the board. The left
arrow indicates the open pin and the right arrow is
pointing to the jumper.