LMX SERIES™ OPERATION MANUAL
SECTION 7: Auxiliary I/O
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2018 by Pacific Power Source, Inc. (PPS) • All Rights Reserved • No reproduction without written authorization from PPS.
LMX Series Power Source Operation Manual
Page 189 of 463
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Relay signal #3 is normally used for the FORM (Mode Change) Relay option on LMX
cabinet systems.
•
Relay signal #4 is normally used for the Transformer Option.
•
A 12V dc output is provided as well to drive a small signal relay to operate a large
contactor.
7.7.2
Digital User Inputs
The digital inputs allow any action to be executed at the rising and/or falling edge of the
signal, by simply assigning a SCPI command for execution to that event.
For example, a digital input can be configured to enable the output at the rising edge and
disable it at the falling edge of the signal. Alternatively, it can be configured to change any
set point and either of those 2 events.
A total of three digital inputs are available. These following input characteristics can be
programmed for each digital input (1, 2 and 3):
•
Command
to execute (a SCPI command string) at each edge. Rising and falling edges
can have different commands.
•
Filter
Setting, to reduce sensitivity to short pulses that can be caused by electrical
noise or some mechanical switches.
See SCPI command section 8.10.1.3 for commands that configure and read digital inputs.
7.7.3
Digital User Outputs
There are four programmable digital outputs (1 to 4), which can be configured to change
state based on different conditions:
•
1=ON, 0=OFF it is used as general-purpose digital output, with the value set with a
SCPI command.
•
OUTPUT_STATE indicates output enabled (1) or disabled (0).
•
FORM indicates single (1) or split/three (0).
•
FAULT indicates fault (1) or no fault (0).
•
TRANSIENT indicates when a transient is running/paused/stepping (1) or stopped
(0).
•
PROGRAM indicates when a program is in execution at steady state level (1) or
manual mode (0).
•
REMOTE indicates remote (1) or local (0).
•
XFMR_COUPLING indicates direct (0) or transformer (1) coupling. This output is
relevant only when an output transformer option is installed and configured.
Note:
Each output can be also configured to invert its logic.
User defined digital inputs can be queried using the SYSTEM:DIO:OUTput# command.
