Multiple ShapeArray (SAAs) can be connected to Measurand’s SAA232-5 converter which functions as a multiplexor. The SAA232-5 works in much the same way as the SAA232 (converts RS232 to RS485, provides surge protection for the ShapeArray, and applies power to a single ShapeArray at a time) but it can accept up to five ShapeArrays and connects them all to one serial port of the PC. The SAA232-5 is used to sample one ShapeArray at a time through the same PC serial port.
For applications where very fast readings are required, multiple SAA232 or SAAUSB devices should be used in place of an SAA232-5.
This guide references the following documentation:
Step 1 - Connect ShapeArrays to the SAA232-5
Plug the ShapeArrays into the green 5-pin connectors on the SAA232-5, as shown in Figure 1.B below.
Figure 1: An SAA232-5 - (A) Power and data connection, (B) ShapeArray connections
Figure 2: A 5-pin Phoenix connector that plugs into the SAA232-5's ShapeArray connections (Figure 1.B above)
The wiring for a 5-pin terminal block or Phoenix Connector is shown in Figure 3 below.
Figure 3: Wiring for a 5-pin terminal block or Phoenix Connector
Step 2 - Connect SAA232-5 to PC via USB Port
If you are connecting using a USB port, Measurand’s SAA232-PC cable will be needed.
Figure 4: An SAA232-PC cable
Remove the 4-pin connector in SAA232-5 from the power and data connection, as shown in Figure 1.A above. Plug the 4-pin connector on the SAA232-PC cable into the now empty slot on the SAA232-5.
Ensure that the USB connector is plugged into an available USB port on the PC that will be running the SAARecorder application.
The marked wire (band or white stripe) should be connected to a +12 V power supply. The black wire should be connected to Ground (GND) on the same power supply. Alternatively, the standard 2.1 mm DC power connector can be used to supply power.
Note: Built-in PC serial ports can also be used to connect to an SAA232-5, see Step 3 below with regards to wiring.
Step 3 - Alternatively, Connect SAA232 to PC via Serial Port
If connecting to the SAA232 via a serial port on the PC, connect the PC serial port to the green 4-pin connector on the SAA232, as shown in Figure 1.A above.
Figure 5: A PC serial port
The wiring for a 4-pin terminal block or Phoenix Connector is shown in Figure 6 below.
Figure 6: The wiring for 4-pin terminal block or Phoenix Connector
Step 4 - Start SAARecorder
Start SAARecorder and click the Connect SAA button.
Figure 7: The SAARecorder Startup window
In the Connect window, select the COM Port you are using and select the SAA232-5 option. Select the SAA232-5 Channels to which ShapeArrays have been connected.
Figure 8: The Connect window in SAARecorder
To go to the data collection portion of SAARecorder, click the Start with found SAAs button. Otherwise, click Next and follow the steps listed below.
Step 5 - Optional, Click on the Search Tab
Figure 9: The Search tab in the SAARecorder Connect window
- Models 1 and 2: An octet (group of 8 segments)
- Model 3 and later: A segment (every segment has a microprocessor)
Step 6 - Optional, Click on the Devices Tab
Figure 10: The Devices tab in the SAARecorder Connect window
Figure 11: The Enter Device Serial Number dialog
Step 7 - Optional, Click on the Test Tab
Figure 12: The Test tab in the SAARecorder Connect window