Names And Functions Of Each Part - Hitachi S10mini Hardware Manual

3 NAMES AND FUNCTIONS OF EACH PART AND CABLING

3.1 Names and Functions of Each Part

LQE040
J.NET
MODU
TX
NO
RX
N1
ERR
BIT
TX
RATE
RX
N2
ERR
TYPE-M52I
TERM
A
B
N1
SG
SHD
TERM
A
B
N2
SG
SHD
FG
① Module No. setting switch
Up to two J.NET modules can be mounted on one CPU
unit. Use this switch to set up the main module and sub-
module. (For details on T/M, see Subsection 6.1.2.)
Set up the main module and sub-module according to the
table shown below.
Setting No.
0
1
8, 9
② Bit rate setting switch
The bit rate setting switch is used to set a transmission rate.
The table below shows the relationship between setting
Nos. and transmission rates.
Setting No.
8 to F
③ Terminal blocks for interface
Nn: Network No.
TERM: Terminals for a terminating resistor. Short these
terminals with a jumper when the J.NET module is
used at an end of the network.
A, B: Used to connect a transmission/reception data line.
SG: Used for signal ground terminal.
SHD: Used for shield ground terminal.
FG: Used for frame ground terminal.
④ LED for transmission
Comes on when the J.NET module starts transmitting data
in each network.
⑤ LED for reception
Comes on when the J.NET module starts receiving data in
each network.
⑥ LED for errors
Comes on when a hardware error is detected in the J.NET
module (see Subsection 6.3.2).
3-2
Main module/sub-module
Main module
Sub-module
Use of T/M
Transmission rate
0 1.0 Mbps
1 0.5 Mbps
2 0.25 Mbps
3 0.125 Mbps
Use of T/M