37
8024252/AE00/V1-0/2020-07| SICK
O P E R A T I N G I N S T R U C T I O N S | ZIRKOR200 Ex-D
Subject to change without notice
INSTALLATION
5
5.10.7
Digital inputs
The digital inputs are designed for a DC voltage of 12 to 30 V for logical “high”. Logical
“low” corresponds to a voltage less than 1 V.
5.10.8
Electrical connections on the probe junction unit
Fig. 16: Electrical connections on the probe junction unit
Digital input
Function
Adjustment release
External release to start adjustment at ACAL
Measuring range switchover
Activate the 2nd O2 measuring range
Note:
The probe cable is to be treated as measuring line.
Under no circumstances
should the
shielding of the probe cable be connected to the
probe side
, as this will lead to
measurement inaccuracies.
DANGER: Danger of explosion through damaged seals
Damaged seals on the enclosure cover can allow explosive air to enter the enclosure
and cause an explosion.
▸
Check seals for damage and replace if necessary.
1
- mV O
2
Measuring cell
(white-brown)
2
+ mV O
2
Measuring cell
(brown)
3
+ mV Thermocouple 1
(green)
4
- mV Thermocouple 1 (white)
31
+ mV Thermocouple 2
(green)
41
- mV Thermocouple 2 (white)
6
L 115 VAC (Max) Probe
heater (black)
7
N 115 VAC Probe heater
(blue)
8
PE protective conductor
(green-yellow)
9
L 115 V Solenoid valve (grey)
10
N 115 V Solenoid valve
(grey-blue)
Note:
The power supply (115 V AC) of the solenoid valve on the probe is realized by the control
unit.
