RTU560

Remote Terminal Unit

Connectivity and Setup

Modem 560FSM10

Operation

The 560FSM10 modem is a CCITT V.23 modem with snap-in DIN rail mounting.

The V.23 uses the frequency shift keying (FSK) method. The modem operates in both 2-wire and 4-wire connections.

The operating mode is set by a 12-fold DIP switch. Figure 1 shows the front view of the modem with the components described in the next chapter from top to bottom.

The power connector X1 consists of three terminals for connection to the supply voltages shown in Table 1.

The PE pin must be connected to ground at the installation. The power indicator lights up when power is supplied.

The RJ45 connector X2 forms the RS232-D interface with the signals in Table 2. If the modem is connected to a communication device, the

If the modem is connected to a communication www.cniacs.com device, an adapter cable must be used to connect the pairs of lines in Table 2.

The RTS indicator lights up when the end device requests to send via the modem.

The DCD indicator lights when the 560FSM10 detects a carrier signal on the line interface. The CTS indicator lights when a carrier is being established.

CTS will be set at the same time. The 20-30ms transmit delay time must be adjusted in the CMU settings.

DIP switch S1 determines the operating mode of the modem. Switch C-1 is reserved for future use.

C-2 establishes a permanent carrier on the line, which is useful in a four-wire full-duplex connection. Table 3 summarises the above carrier modes.