Manual

E-M-PF4-V1_00
Rotronic AG
Bassersdorf, Switzerland
Document Code Unit
PF4 Differential Pressure Transmitter:
Instruction Manual
Instruction Manual
Document Type
Page
42 of 54
Document Title
© 2014; Rotronic AG E-M-PF4-V1_00
6.6 Relay
The relay can be used in operation as an alarm switch contact. The functions have already been described in
section 3.6 . The relay is configured with the HW4 software, as described in the manual E-M-HW4v3-P-001.
6.6.1 Connections
The relay switch contacts are located at terminal block K3 (see Figure 14).
Connection Designation Description
COM Common Center tap of the change-over switch
NO Normally open Open when relay is not energized, closed when relay is energized
NC Normally closed Closed when relay is not energized, open when relay is energized