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Pressure Systems, Inc. NetScanner™ System (9016, 9021, & 9022) User’s Manual
www.PressureSystems.com
6 - 1
Chapter 6
Troubleshooting Guide
6.1 Ethernet Module Troubleshooting
6.1.1 Checking Module Power-Up Sequence
(1) Proper power to the module should first be verified. If possible, verify that the output of the
module power supply is set within the range of 18-36 VDC. This should be nominally set
for 24 VDC. Ensure the power supply setting is high enough to compensate for cable
voltage drops if long interface cable lengths are used.
(2) Turn module power switch ON and verify the following top panel LED status following
initial power-up :
! PWR LED should remain ON
If this LED is not on, all other LED’s will likely also be off. Check the PSI
90DB, remote power supply (8491), or customer provided power supply to
ensure the proper voltage (18-36 VDC) is being provided. Also verify that
the power pins in the module interface cable are wired as described in
Section 2.3.2 and Appendix D.
! COL LED should remain OFF
! Tx LED should remain OFF
Note that any activity of the Tx LED during the power up sequence is an
indication that the RARP/BOOTP protocol is enabled. This will typically
occur following the initial Busy (BSY) LED cycle and continue until an
appropriate RARP reply is received.
! LNK LED should remain ON
This LED indicates proper connection to an Ethernet hub or switch. If this
LED is OFF, verify that the module is properly connected to the
communications hub or switch. Verify proper power is applied to the hub.
Also try connecting the 9016, 9021, or 9022 cable to a different port of the
hub. Note that most hubs have similar link LEDs to indicate proper