KROHNE DW 181-182-183-184 ATEX EN - Manual (Page 13)

ELECTRICAL CONNECTIONS
3
13
DW 18 SERIES
www.krohne.com 11/2011 - 4001528201 - AD ATEX DW181-184 R01 en
3.4 Ex d / Ex tb equipment
3.4.1 General notes
3.4.2 How to connect the electrical cables
3.4.3 Maximum switching capacity values for the electrical circuit
• U
max
= 380 V
• P
c
= 20VA
3.4.4 Electrical schematics
DANGER!
Do not open the housing while the device is energized.
INFORMATION!
Cable entries are supplied on customer demand. If you supply the cable entries, this part must
have a degree of ingress protection IP≥65 (EN 60529).
WARNING!
Use only Ex d-approved cable entries and plugs for Ex d applications. Use only Ex t-approved
cable entries and plugs for Ex t applications.
Do not remove more than 6 mm / 0.2
¨ of insulation from the wire.
Figure 3-2: Electrical schematics for Ex d-approved equipment (switch options)
1 K1: 1 × N/O (normally open) switch
2 K1: 1 × N/C (normally closed) switch
3 KV1: 1 × N/O switch with amplifier relay