IS 12-TSP / IGA 12-TSP Manual
Controls and Installation
•
14
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
6
8
4
5
3
1
2
7
Pin assignment
of right connector
(side of male inserts)
7
pink
Limit contact S1
(drawing shows status without power
or with exceeded limits)
5
white
1
yellow
3
grey
Limit contact S2
(drawing shows status without power
or with exceeded limits)
6
green
4
brown
2
blue
8
red
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
4.2.1 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
4.9, SETP (limit contacts
) or via PC and software
InfraWin. The switch time of the relay contacts is 2 ms plus the response time of the pyrometer.
3.2
Connecting the pyrometer to a PC
The pyrometers are equipped with a serial interface RS232 or RS485 (switchable at the
pyrometer) for connection 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 electromagnetic interferences can affect the transmission.
With RS485 the transmission is to a large extend free of problems, long transmission distances
can be realized 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 pyrometer’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 response of a command to the pyrometer (see
4.14, Wait time tw
).
3.2.1
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 doubled (see
4.12 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)
