3
ELECTRICAL CONNECTIONS
12
DW 18 SERIES
www.krohne.com
11/2011 - 4001528201 - AD ATEX DW181-184 R01 en
3.3.3 Electrical schematics
Figure 3-1: Electrical schematics for Ex ia-approved equipment (switch options)
1
K1: 1 × N/O (normally open) switch
2
K1: 1 × N/C (normally closed) switch
3
K2: 2 × N/O switches
4
K2: 2 × N/C switches
5
K2: 1 × N/O and 1 × N/C switches
6
K2: 1 × N/C and 1 × N/0 switches
7
K1 changeover: 1 × 3-wire SPDT switch
8
K2 changeover: 2 × 3-wire SPDT switches
