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IMPAC pyrometer IP 140-LO
4
Electrical Installation
The IP 140-LO is powered by a voltage of 24 V DC or AC (48 to 62 Hz) (possible range: 14 to 30 V). The
instrument needs some time to warm up. This time depends of the ambient temperature and connected
power supply. During this time the display indicates "wait".
The analog output is 0 mA. After the warm up time the dis-
play shows the measuring temperature.
For switching off the instrument, interrupt the power supply
or unplug the electrical connector.
Directly after connecting the power supply the display shows
for information the internal firmware version for approxi-
mately 1 s. The green control light on the rear cover is
switched on permanently. This control light is blinking as
long as the laser targeting light is switched on.
Note:
At object temperatures below 150°C and emissivity smaller than 90% the pyrome-
ter needs another half an hour until the final accuracy is reached.
Otherwise a sufficient accuracy is reached after approx. 10 min.
To meet the electromagnetic requirements (EMV), a shielded connecting cable must be used. The shield of
the connecting cable has to be connected only on the pyrometer's side. On side of the power supply (switch
board) the shield must be open to avoid ground loops.
IMPAC offers connecting cables, they are not part of standard scope of delivery. The connecting cable has
wires for power supply, interface, analog output, external laser switch and external clear of maximum value
storage via contact (see section 15, Reference numbers) and 12 pin connector. The cable includes a short
RS232 adapter cable with a 9 pin SUB-D connector for direct PC communication. This adapter is not used in
combination with RS485 interface.
4.1
Pin assignment of the male socket on the back of the pyrometer
Pin
Color
Indication
K
white
+ 24 V power supply (or 24 V AC) (range 14 to 30 V)
A
brown
+ I
L
green
B
yellow
– I
H
gray
external switch for targeting light (bridge to K)
see 4.1.1: operating mode contact or external clearing of
J
pink
maximum value storage or hold function
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)
Screen only for cable extension,
M
orange
don't connect at the switchboard
4.1.1
Connector pin J
The connector pin J can be used for 3 different functions:
1) Operating mode contact: During the warm-up of the pyrometer (after connection to the power supply,
the LED display on the converter indicates "wait") pin J is connected to the power supply voltage. This volt-
age is connected by a relays switch (max. 0.2 A at 50 V) to pin K (power supply voltage). This relays switch
opens when the warm-up is finished and the pyrometer is in operating mode. For that reason this pin can be
used as operating mode contact.
8
0 V power supply
analog output
outp.
analog output
outp.
Green
control light
Internal Firm-
ware version for
approx. 1 s
"wait" indication
during warm-up
period
Male socket
E
F
G
D
M
H
C
L
J
B
A
K
Pin-assignment
(side of male inserts)
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