CTI 2550-A, Installation And Operation Manual

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C T I 2550-A Installation and O peration G uide 13
NOTE:
The 5V input signal range configuration is used for both 0 to 5VDC and
1 to 5VDC or 4 to 20mA and 0 to 20mA input signal ranges.
2.3 Configuring the Module
The Model 2550-A must be configured for voltage or current inputs, voltage range, unipolar/bipolar
mode, and digital filtering/no filtering mode before wiring the input connectors and inserting the module
into the I/O base. As shipped, all input channels are configured for current inputs, 5V range (see note
below), unipolar mode, digital filtering enabled, and offset scaling disabled (see Figure 14).
Changing the module input channel configuration involves the following steps:
1. Selecting voltage (V) or current (I) input mode for each channel
2. Selecting 0 to 5V or 0 to 10V voltage range for each channel
3. Selecting unipolar or bipolar input mode for each channel
4. Selecting digital filtering or no filtering for the module
5. Selecting offset scaling for the module
6. Selecting 8WX or 16WX Advance Mode for the module
(Advanced Mode not supported in this release).
7. Configuring DIP switches to report the hardware selections to the microcomputer
8. Logging the configuration jumper settings for future reference
Each of these steps is described in the following sections.
2.3.1 Selecting Voltage or Current Input Mode
Locate the 8 Voltage/Current Jumpers corresponding to input channels 1 through 8. See Figure 14 for
the location of these jumpers. For each input channel, select current mode by placing the jumper in the
“I” position or voltage mode by placing the jumper in the “V” position. For each input channel set to
current mode, you must set the corresponding Voltage Range Jumper to the 5V position as described in
the following section.