User manual

60 Chapter 8 Special Features: Power Over the Serial Ports
1. Open the device unit enclosure and move the black jumper to the
following settings:
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 61 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 jumper to the
following setting:
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.
Note: When the jumper is
placed correctly for
power in, the jumper w
ill
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.