Z-System – Zener Barriers
Product Specifications
20
16-
03
13
2.4
Color Identification
The color identification of the devices has the following meaning:
• Red (1) indicates DC devices with positive polarity.
• Black (2) indicates DC devices with negative polarity.
• Gray (3) indicates AC devices.
• Blue (4) indicates the terminals of the field side (hazardous area).
Figure 2.7
Color identification of devices
1
red
2
black
3
gray
4
blue
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
2
1
3
4