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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.
HSD DATA 1
HSD DATA 2
HSD
MODEM
IB-680
(RS-232)
(RS-449)
HSD
TERMINAL
Serial straight cable
RS-232 interface: 25 pin connector
RS-449 interface: 37 pin connector
To comm. unit
ex.
Router
Figure 13 Connection of HSD modem and HSD terminal
RS-232 interface description
Pin (male) arrangement
.oNniP
232-SR
langiS
TTICC
tiucriC
noitpircseDlangiSETD-ECD
2DT301ataDdettimsnarT
←
3DR401ataDdevieceR
→
4STR501dneSottseuqeR
←
5STC601dneSotraelC
→
6RSD701ydaeRteSataD
→
7GS201dnuorGlangiS–
8DCD901rotacidnIlangiSevieceR
→
51CT411kcolCtimsnarT
→
71CR511kcolCevieceR
→
02RTD801ydaeRlanimreTataD
←
22IR521rotacidnIgniR
→
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