IN 5/9 plus Manual
Controls and Installation
•
14
commonly used adapters are too slow for fast measuring equipment, so it is recommended to
use the RS485
USB adapter cable (ref. no. 3 826 750).
With a slow RS485 connection it is also possible to set a wait time at the pyrometer, which
delays the response of a command to the pyrometer (see
5.2.6 Wait time t
w
).
3.1.3
Connecting to RS232 interface
The transmission rate (in baud) of the serial
interface is dependent on the length of the cable.
Values between 1200 and 19200 Bd may be set.
The baud rate must be reduced by 50% when the
transmission distance is doubled (see also
5.2.3
kBaud (baud rate)
).
Typical cable length for RS232 at 19200 Bd is 7 m.
3.1.4
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
19200 Bd may be set.
The baud rate is reduced by 50%
when the transmission distance is doubled (see
5.2.3 Baud Rate (kBaud)
).
Typical cable length
for 19200 Bd is 2 km.
3.1.5
Connection of additional analyzing devices
Additional analyzing instruments (such as LED digital display instruments) only need to be
connected to a power supply and the analog outputs from the pyrometer. Another Instrument,
such as a controller or printer, can be connected to the display in series as shown below (total
load of resistance max. 500 Ohm).
yellow
LED digital display
Controller
Power supply
green
brown
white
230 V ~
24 V DC
°C
Writer
Converter
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)
TxD (violet)
Pyrometer’s side
(soldering side)
cable
PC’s side
(soldering 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
DG
ND
B
1
A
2
B
2
A
1
DG
ND
B
1
A
2
B
2
A
1
DG
ND
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
