Furuno IB-681 manual Wiring between HSD modem and router

5.2 Wiring

5.2.1 Wiring between HSD modem and router

A serial straight cable with a 25 pin connector (RS-232 interface) or 37 pin connector (RS- 449 interface) connects between the IB-681 and HSD terminal (ex. Router) as shown below. The interface to use is selected with DIP switch SW2. For the RS-232 interface, the length of the cable must not exceed 15 meters. If a longer cable is required use the RS- 449 interface instead. Only one HSD Terminal (Router) can be connected.

To comm. unit

HSD DATA 1

HSD

MODEM

IB-680

HSD DATA 2

(RS-232)

HSD

TERMINAL

ex. Router

(RS-449)

Serial straight cable

RS-232 interface: 25 pin connector

RS-449 interface: 37 pin connector

Figure 13 Connection of HSD modem and HSD terminal

RS-232 interface description

	Pin No.	RS-232	CCITT	Signal Description	DCE-DTE
		Signal	Circuit
	2	TD	103	Transmitted Data	←
	3	RD	104	Received Data	→
	4	RTS	105	Request to Send	←
	5	CTS	106	Clear to Send	→
	6	DSR	107	Data Set Ready	→
	7	SG	102	Signal Ground	–
	8	DCD	109	Receive Signal Indicator	→
	15	TC	114	Transmit Clock	→
Pin (male) arrangement	17	RC	115	Receive Clock	→
	20	DTR	108	Data Terminal Ready	←
	22	RI	125	Ring Indicator	→

Pin nos. 1, 9-14, 16, 18-19, 21, 23-25 are not used.

Figure 14 RS-232 Interface

Note: The HSD modem uses synchronous serial communication, therefore the HSD ter- minal (PC, etc.) cannot be directly connected unless it has a synchronous serial port.

RS-449 interface description

20