7-2 NetScan User’s Manual
Rear Panel

NetScan’s rear panel contains several items, including a set of LEDs for status indication. The LED indicators are

described in the following table. Other rear panel items are listed in a separate table following the illustration.

LED Indicators, Chassis
ALARM ON when an alarm has occurred. The indicator remains ON until the alarm condition clears.
OFF when no alarm condition exists.
TRIGGER Flashes when ARMed (waiting for a trigger), is ON c ont inuous when triggered; is OFF when
data collection is finished. Trigger is also turned OFF by IEEE DCL or SDC.
SCAN ON when NetScan is storing a channel scan in its internal buffer.
SEND ON when transmitting data to the serial interface (for RS-232 operati on onl y).
RECEIVE ON when receiving data from the controlling computer (for RS-232 operation only).
ERROR ON when an error has occurred, OFF when no error condition exists. See the Error Query (E?)
command for more information.
POWER ON when power is applied to NetScan and the power switch on the back panel is in the ON
position (depressed). OFF if power is not present.
LED Indicators, Ehternet Interface Panel
ACTIVITY ON when data is being s ent or received through the internet.
LINK ON when the NetScan unit has a solid connection to the internet.
ETHERNET ON when the ethernet interface is enabled and functioning properly.
OFF when the ethernet interface is disabled.
FLASHES when a problem exists that requires factory attention.

NetScan Rear Panel

Item Description
Power
Connector Provides a means for connecting NetScan to one of two voltage supplies:
105 - 125V, or 210 - 250V. The connected power supply must agree with that selected by
NetScan’s internal slide switch (described later in this chapter).
Power Switch Turns power ON or OFF.
Chassis Ground A single point grounding node for, but not limited to, thermoc oupl e shield termination.
Calibration
Enable/Disable Pushbutton used to enable/disable the hardware protected portion of NVRAM during NetScan
main unit calibration. Refer to Chapter 6 for detailed information.
Trigger In BNC Trigger input for initiating and/or stopping acquisition with TTL i nput signal
TTL Output BNC TTL Scan output signal occurs for each channel scan; used for synchronizing other
equipment with NetScan acquisition.
Alarms & Digital I/O
(DB50) Connector DB50 connector offers easy access to Alarms and Digital I/O (32 digital outputs and 8 digital
inputs)
RS-232/422 (DB9)
Connector Serial port for operation at remote distances from controlling computer supports 300 to 9,600
baud using RTS/CTS or XON/XOFF handshaking.
DIP Switch Used for selecting RS-232 or RS-422 and respective communicat ion parameters, i.e.,
handshaking, parity and Baud Rate.
Interface Card Slot For installing the optional IEEE 488 interface card. Note t hat RS-232 serial interface is the
default and is possible with or without an interface card.
LED Indicators See previous table.