Installation
5.5 Power Supply
Connections from a 24 VDC (500 mA or higher) power supply attach to the appropriate terminals on the electronic enclosure’s terminal strip.
Isolated power is required, and this is provided by the appropriate manufacturer supplied power supply accessory. Beware of use of other power supplies which may not provide the necessary isolation and could cause instrument malfunction or damage!
5.6 RS232/485 Interface Converter
To connect to a computer’s RS232 port, you need one of the Interface Converter accessories (similar to the following figure) and the proper RS232 cable. If your computer has an RS485 interface card, you can connect the sensor directly to its port (using the proper connector) with wiring from the electronic enclosure’s terminal block.
Connect the interface converter to an available COM port on your computer, either directly or with an appropriate serial cable (available from computer supply stores). If your computer has a 9‐pin serial connector, use the supplied 25‐pin to 9‐pin cable between the interface converter or cable and the computer.
For appropriate interface converters, see section 8.5 RS232/485 Interface Converter on page 37.
| From electronics housing ... |
RS485 | not |
| used |
| RS485 Connector (screw terminals) |
Optional power connector | Optional power connector |
9 VDC as alternative to | 9 VDC as alternative to |
24 VDC power supplement | 24 VDC power supplement |
RS232 | RS232 |
Figure 17: RS232/485 Interface Converter, with pins (left, XXX485CV…)
or terminal (right, XXX485CVT…)
The RS485 output is as follows:
Baud rate: 300, 1200, 2400, 9600, 19200, 38400 (default)
Note: Adjustable baud rate only available through 2‐way RS485.
Data format: 8 bit, no parity, 1 stop bit 4‐wire, full duplex, point‐to‐point
5.7 Connecting to a PC
To set up your computer to initialize the sensors, complete the following steps:
1.Remove power from the FA/FR sensor!
Marathon Series FA/FR | 21 |