E-m-pf4-v1_00, 6 relay – ROTRONIC PF4 User Manual
Page 42
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