Identifying your Xircom product (finally, an index!!!)
Power Supply Requirements
Linux Driver Attempt for PE3 / PE2 Ethernet (gave up in '97)
PT3-16CTP  Pocket Token Ring III Adapter 
  Install, ac and phantom power.

   The odd cable for the PE III adapters takes the power from the PS/2 port. This doesn't strike me as all that smart, as the adapters use from 300-600 mA. The TR models can't use the L40SX mouse port, too high of a power draw.

PEM-10BT  Pocket Ethernet+Modem Adapter
PEPS  Pocket Ethernet Print Server
PEPS2  Pocket Ethernet Print Server II
PET  Pocket EtherTalk Adapter
PPX  Parallel Port Multiplexor
PPX-02 Parallel Port Multiplexor II
PPX-03 Parallel Port Multiplexor III Look HERE for stuff.

PT04B3-128K  Pocket Token Ring Adapter
PT2-16B3  Pocket Token Ring II Adapter

PT2-16BT  Pocket Token Ring II Adapter

Install PT3-16CTP

  With system OFF, plug Pocket adapter into parallel port. The Xircom logo and LEDs must be on top. Rotate the red band (tractor grip) clockwise until the screws are secure. When the screws are tight, the band will "click" as you rotate it.

Install Phantom Power Cable

  Power system OFF. Ensure Pocket Adapter is attached to parallel port. Insert L shaped plug into Pocket Adapter. Plug pass through power connector into PS/2 port.  If you need to, plug your mouse into the pass-through connector.
NOTE: Use ONLY mice on the pass-through connector.Other devices may blow the fuse on the planar.

NOTE: The mouse port on the L40SX is NOT compatible with the phantom power cable.

Install Wall-Mount AC Adapter

 
 

PTPS  Pocket Token Ring Print Server
PTPS2  Pocket Token Ring Print Server II

Below are the power requirements for our Pocket Adapters:
Input Voltage: 120 VAC/60 Hz
Output Voltage: 12 VDC unregulated, 500 mA
The Pocket Ethernet Series adapters require 12 VDC unregulated, center
positive, capable of supplying the following current:

pe2-10b2 uses ......500ma
pe2-10bt uses.......300ma
pe2-10bx uses.......600ma

Pe3-10b2 uses .........300 ma
Pe3-10bt uses..........300 ma
Pe3-10bx uses...........600ma

An AC adapter putting out 500mA will usually work with any of them.
(Ed. Note that the -10bx adapters are 600mA, must be trying to power both interfaces?)