Acromag, Inc. Tel: 248-295-0880
- 18 -
Model SP33X-0700
4-Wire DC I/V Signal Splitter w/USB
TECHNICAL REFERENCE
OPERATION STEP-BY-STEP
Connections
This section will walk you through
the Connection-Configuration-
Calibration process step-by-step.
But before you attempt to
reconfigure or recalibrate this
transmitter, please make the
following electrical connections
Connect Input
Connect Output
Connect Power
Connect
PC/USB
Configure I/O
Note:
Your input source, output meters, and load resistors (current outputs) must
be accurate beyond the unit specifications, or better than ±0.1%. A good rule of
thumb is that your equipment accuracy should be four times better than the rated
accuracy you are trying to achieve with this transmitter.
Calibration Connections:
1.
Connect Input:
Connect a precision current source to the TB1 input terminals
(SP336 only), or a precision voltage source to the TB1 or TB2 input terminals as
required for your input model/range. Your signal source must be adjustable to
the nominal input range zero and full-scale levels. Observe proper polarity.
For voltage input, use a voltage source with an output impedance of 100
or
less. For best results, set the input filter as desired before calibrating an input.
2.
Connect to One Output, Voltage or Current of Each Output Channel:
Wire
output loads to the unit appropriate for either current or voltage, as required
by your application. You will need to measure output current or voltage
accurately to calibrate the output. You could connect a current meter in series
with the load to read the output current directly, or a digital volt meter in
parallel with the load to measure output voltage. Alternatively, you could
simply connect a voltmeter across a precision load resistor to accurately read
output current as a function of the IR voltage drop produced in the load
resistor (recommended for current outputs).
3.
Connect Power:
Wire 6-32VDC power to the unit at TB5 as shown in the
Electrical Connections section. Optionally, you may wire power to the bus
terminal as shown in the optional power connections drawing. But in either
case, never exceed 36VDC peak, or damage to the unit may result.
Apply power to the transmitter before connecting to USB. You will not be able
to configure or calibrate the unit without power also applied, as this device
does not draw power from its USB connection.
4.
Connect to PC via USB:
Connect the transmitter to the PC using the USB
isolator and cables provided in Configuration Kit TT-SIP (refer to Accessories).
You may omit the isolator only if you are using a battery powered laptop to
connect to the unit, or if your input source is not already grounded.
Now that you have made your connections and applied power, you can
execute the SP33XConfig.exe software for your model to begin configuration of
the unit (software is compatible with v7 or later versions of the Windows
operating system).