LumaSense Technologies IS 12-TSP - Handbuch (Seite 9)

IMPAC pyrometers IS 12-TSP · IGA 12-TSP
9
4.1.2 for additional limit contacts cable
The instrument is equipped with two independent relay limit switches. These are two separate switch-over
relay contacts, changing its state if the adjusted temperatures are exceeded.
Pin Color Indication
7 pink
5 white
1 yellow
Limit contact S1
(drawing shows status without power or with
exceeded limits)
3 grey
6 green
4 brown
Limit contact S2
(drawing shows status without power or with
exceeded limits)
2 blue
8 red
6
8
4 5
3 1
2
7
Pin assignment
of right connector
(side of male inserts)
The drawing of the limit contacts indicates their switch status without power. The limit contacts switch after
supplying the pyrometer with power. If the temperature exceeds the adjusted limit value, the corresponding
limit contact switches back in the first position and is indicated by the corresponding LED on the pyrometer
(see 8.2 under Limit contacts).
Any temperature value within the range of the pyrometer is adjustable. The setting of the limits can be done
directly at the pyrometer (see 9.6, SETP (limit contacts)) or via PC and software InfraWin (see 10.6, Basic
settings or 10.7, Measurement color bar. The switch time of the relay contacts is 2 ms plus the response
time of the pyrometer.
4.2
Connecting the pyrometer to a PC
The pyrometers are equipped with a serial interface RS232 or RS485 (switchable at the pyrometer) for con-
nection to a processor / PC. Standard 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 electro-
magnetic 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  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 (order no. 3 852 430).
With a slow RS485 connection it is also possible to set a wait time at the pyrometer which delay the re-
sponse of a command to the pyrometer (see 9.12, Wait time tw).
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 2400 and
115200 Bd may be set.
The baud rate has to be reduced by 50%
when the transmission distance is dou-
bled (see also 9.10, Baud rate (kBaud)).
Typical cable length for RS232 at 19200
Bd is 7 m.
PC’s side
(soldering side)
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