Electrical connection
NAR300 system for high temperature
38
Hauser
6.4
Wiring diagram
A
B
15
15
8
11
12
14
10
9
13
8
11
12
14
10
9
16
1
2
3
6
7
1
2
3
4
5
6
7
PE
PE
GND
GND
4
5
A0039910
24
Wiring diagram
A
Ex d-type transmitter system (integrated type)
B
Intrinsically safe-type transmitter system (separate type)
PE Protection earth (protective grounding)
GND Class A grounding (TIIS specifications only)
1
Conductivity detection electrode (sensor)
2
Conductivity detection electrode (float)
3
Dedicated cable
4
Conductivity detection circuit
5
Current output circuit
6
Sensor I/F Ex box
7
Current signal
8
Safety barrier
9
Power supply circuit
10 Current sensor
11 Relay
12 Delay circuit
13 Transmitter NRR262
14 Delay trimmer
15 Alarm
16 Transmitter NRR261 (separate type)
Although a Class A grounding cable can be shared with grounding of other safety
barriers, it cannot be shared with grounding of a lightning arrester.
