LumaSense Technologies IS 12-Al/S - Manual (Page 15)

IS 12 AI & IS 12-AI/S Controls and Installation 15
Connecting to RS232 interface
The transmission rate (in baud) of the serial
interface is dependent on the length of the cable.
Values between 2400 and 115200 Bd may be set.
The baud rate has to be reduced by 50% when the
transmission distance is doubled (see also 5.10
kBaud (baud rate)).
Typical cable length for RS232 at 19200 Bd is 7 m.
Connecting to RS485 interface
Half-duplex mode:
A1 and A2 as well as B1 and B2 are
bridged in the 12-pin round connector
of the connecting cable, to prevent
reflections due to long stubs. It also
safeguards against the interruption of
the RS485 Bus system should a
connecting plug be pulled out. The
master labels mark the connections on
the RS485 converter. The transmission
rate of the serial interface in Baud (Bd)
is dependent on the length of the
cable. Values between 1200 and
115200 Bd may be set.
The baud rate is reduced by 50% when
the transmission distance is doubled (see
5.10 kBaud (baud rate)). Typical cable
length for 19200 Bd is 2 km.
3.1.3 Connection of additional analyzing devices
Additional analyzing instruments, for example a LED digital display instrument, only needs to be
connected to a power supply and the analog outputs from the pyrometer. Other Instruments,
like a controller or printer, can be connected to the display in series as shown above (total load
of resistance max. 500 Ohm).
yellow
LED digital display
controller
power supply
green
brown
white
230 V ~
24 V DC
°C
writer
K A B
C
D
J
G F E
H
M
L 1 2 3 4 5
6 7 8 9
DGND (red)
RxD (black)
Pyrometer’s side
cable
PC’s side
Terminator 120 Ohm
A
B
S
K A B
C
D
J
G F E
H M
L
K A B
C
D
J
G F E
H M
L
K A B
C
D
J
G F E
H M
L
D
G
N
D
B
1
A
2
B
2
A
1
D
G
N
D
B
1
A
2
B
2
A
1
D
G
N
D
A
2
B
2
A
1
B
1
Master
Pyrometer 32
e.g. address 31
Pyrometer 2
e.g. address 01
Pyrometer 1
e.g. address 00
TxD (violet)