Series IN 500 Operating Manual
Controls and Connections 15
3 Controls and Connections
3.1 Installation
The pyrometers are powered by 24 V DC (possible range: 10 to 30 V DC). Ensure correct polarity
when connecting the instrument to the power supply. To switch off the instrument, the power
supply has to be interrupted.
To meet the electromagnetic requirements (EMV), a shielded connecting cable must be used.
The shield of the connecting cable (diameter: 3 - 6.5 mm, max. 12 wires) has to be connected
only on the pyrometer’s side. If the connecting cable is extended, the shield of the extension
also needs to be extended. On side of the power supply (switch board), the shield must be open
to avoid ground loops.
Connection signal output and power supply
Connection sensor head
1
RS485 „A2“
4
NTC resistor
(yellow)
2
RS485 „B2“
3
NTC resistor
(green)
3
Relay contact (isolated)
(pink)
2
Thermopile (+)
(white)
4
Relay contact (isolated)
(grey)
1
Thermopile (-)
(brown)
5
RS232 interface TxD (RS485 „A1“)
(violet)
Note:
The sensor head is already
connected to the converter
(state of delivery).
6
RS232 interface DGND
(red)
7
RS232 interface RxD (RS485 „B1“)
(black)
8
Sensor head temp. (connection to GND)
(blue)
9
Analog output mA or V or
type K or type J (connection to GND)
(green)
10 GND (- OUT)
(yellow)
11 0 V
(brown)
12 +10 ... +30 V DC
(white)
