2 connecting the pyrometer to a pc, 1 connecting to rs232 interface, Connecting the pyrometer to a pc – LumaSense Technologies IN 5-H plus Benutzerhandbuch
Seite 10: Connecting to rs232 interface
IMPAC pyrometers series IN 5 plus
10
4.1
Pin assignment for the connector on the back of the pyrometer
Pin
Color
Indication
K
white
+ 24 V power supply (18 to 30 V)
A
brown
0 V power supply
L
green
+ I
output.
analog output
B
yellow
– I
output.
analog output
H
gray
external switch for targeting light (bridge to K)
J
pink
external clearing of maximum value storage
(bridge to K) *
)
G
red
DGND (ground for interface)
F
black
RxD (RS232) or B1 (RS485)
C
violet
TxD (RS232) or A1 (RS485)
D
gray/pink B2 (RS485) (bridge to F)
E
red/blue
A2 (RS485) (bridge to C)
M
orange
screen only for cable extension,
don’t connect at the switchboard
*
)
for setting of clear time to "extern" (see 9.2.1 Maximum / minimum value storage)
4.2
Connecting the pyrometer to a PC
The pyrometers are equipped with a serial interface RS232 or RS485 (switchable at the pyrometer). Stan-
dard on a PC is the RS232 interface. At this interface one pyrometer can be connected if the interface is set
to RS232. Only short distances can be transmitted with RS232 and electromagnetic interferences can affect
the transmission.
With RS485 the transmission is to a large extend free of problems, long transmission distances can be real-
ized and several pyrometers can be connected in a bus system. If RS485 is not available at the PC, it can be
realized with an external converter which converts the RS485 in RS232 for a standard connection to a PC.
When using a converter RS485
Ù RS232 take care, that the converter is fast enough to receive the pyrome-
ter’s answer to an instruction of the master. Most of the commonly used converters are too slow for fast
measuring equipment. So it is recommended to use the LumaSense converter
Ι-7520 (order no. 3 852 430).
4.2.1
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 has to be reduced by 50%
when the transmission distance is dou-
bled (see also 9.2.3 Baud rate)
Typical cable length for RS232 at 19200
Bd is 7 m.
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)
K
A
B
C
D
J
G
F
E
H
M
L
Connector
Pin assignment
(side of male inserts)