Chapter 1 Product Introduction
RDU501 Intelligent Monitoring Unit User Manual
1.1.2 Expansion card
The four expansion slots of the RDU501 main unit support hot-swap connection of EXP8COM card, EXP8DIAI card,
EXP8DOAO card and EXP2DI6DO card.
EXP8COM card (optional)
The EXP8COM card provides 8 serial ports and supports RS232/RS485 communication to connect user device
(RS232/RS485 line-sequence adaptive). Its appearance is shown in Figure 1-2.
2
1
3
1. Data receiving indicator1-8 2. Data ransmission indicator1-8 3. Serial port 1-8
Figure 1-2 EXP8COM card
The indicators of the EXP8COM card are defined in Table 1-10.
Table 1-10 Definitions of the indicators of the EXP8COM card
COM1 to COM8
Green
Yellow
EXP8DIAI card (optional)
The EXP8DIAI card provides eight digital or analog input interfaces (digital and analog adaptive) and supports
digital/analog inputs. The appearance is shown in Figure 1-3.
1
2
1. Break-away detection indicator 1-8 2. Digital / analog input 1-8
Figure 1-3 EXP8DIAI card
The port definition of the EXP8DIAI card is shown in Table 1-11.
Table 1-11 Definitions of the ports of the EXP8DIAI card
Digital or analog input 1 to 8 RJ45 port DI/AI1 to DI/AI8
Digital input potential-free dry contact;
Analog input 0 to 10V or 4mA to 20mA
EXP8DOAO card (optional)
The EXP8DOAO card provides eight digital or analog output ports (digital and analog self adaptive) and supports
digital/analog output, wherein the digital output is not energized. The appearance is shown in Figure 1-4.