LumaSense Technologies ISQ 5-LO - Handbuch (Seite 9)

IMPAC pyrometers ISQ 5 · ISQ 5-LO
9
3.1.2 Connecting a pyrometer with video module
The pyrometer ISQ 5-TV and ISQ 5-TV-C are equipped with an additional 2 pin connector for video output on
the rear cover. LumaSense offers ready made video connection cables in different length which have Cinch
and SCART plug for connection to a video monitor.
Using self-made cables: a 2-wire shielded cable must be used, the shield has to be connected to the housing
of the plug on pyrometer side only. Video ground and pyrometer housing are galvanically separated. The
maximum cable length should not exceed 40 m.
(fixed socket: model ERA.0S.302.CLL,
straight plug: model FFE.0S.302.CLAC50
Fa. Lemosa GmbH, http://www.lemo.de)
Pin 1 Video-Output: BAS-Signal (white)  Cinch: middle pin SCART: Pin 20
2 1
Pin 2 Video- Output: Ground (brown)  Cinch: shield SCART: Pin 17
Note: The video output is not isolated from the power supply, therefore if several units are
switched together using a video multiplexer, then each unit must have its own isolated
power supply.
3.2
Connecting the pyrometer to a PC
The pyrometer is equipped with a serial interface RS232 or RS485. Standard on a PC is the RS232 inter-
face. 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  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).
3.3
Connection via interface RS232
The transmission rate (in baud) of the serial interface is
dependent on the length of the cable. Values between
1200 and 38400 Bd may be set.
The baud rate has to be reduced by 50% when the
transmission distance is doubled (see also 8.4 Baud
rate).
Typical cable length for RS232 at 19200 Bd is 7 m.
The software InfraWin contains a function to test the
reliability of the transmission with the selected baud
rate (see under 9.7, Basic settings  Test)).
PC
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
3.4
Connection via interface RS485
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 pre-
vent 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 con-
verter. The transmission rate of the serial
interface in Baud (Bd) is dependent on the
length of the cable. Values between 1200
and 38400 Bd may be set.
The standard cable length for 19200 Bd is
2 km. The baud rate is reduced by 50%
when the transmission distance is doubled
(see 8.4 Baud rate). 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
GND B1 A2 B2 A1
D
GND B1 A2 B2 A1
DGND
A2 B2 A1 B1
Master
Pyrometer 32
e.g. address 31
Pyrometer 2
e.g. address 01
Pyrometer 1
e.g. address 00