YOKOGAWA FLXA402 - Wiring Relay Module (Contact Outputs)

<2. WIRING AND INSTALLATION>
2-10
IM 12A01F01-02EN 2nd Edition : Feb. 19, 2019-00
2.5.2 Wiring relay module (Contact outputs)
Contact conguration of FLXA402 is the Single Pole Double Throw SPDT relay, which allows
signals to be used as digital output to controller or PLC etc.
Use multi-core cables for contact output signals.
Those screws of contact terminals are all M3 with washer.
Terminal
number
Contact
terminals
Description
32 S1(NC) Contact S1 Normally Close
31 S1(C) Contact S1 Common
33 S1(NO) Contact S1 Normally Open
42 S2(NC) COntact S2 Normally Close
41 S2(C) Contact S2 Common
43 S2(NO) Contact S2 Normally Open
52 S3(NC) Contact S3 Normally Close
51 S3(C) Contact S3 Common
53 S3(NO) Contact S3 Normally Open
72 S4(NO) Contact S4 Normally Open
71 S4(C) Contact S4 Common
73 S4(NC) Contact S4 Normally Close
Figure 2.9 Relay module contacts
FLXA402 has 4 contact outputs, which allows conguration to adjust to operation. Contact S4 is
fail safe contact. See IM-Converter operation
IM 12A01F01-03EN Section 4.4.
There are 2 cable inlets. Take a suitable one to run wiring with good structure. Be sure to plug
unused cable gland with a supplied rubber close up plug.
l Alarm (Process Alarm monitoring)
Contact outputs an alarm when a measurement exceeds or falls below the permissible range.
l Error
Contact outputs Error, “Fault” or “Problem”. Internal function of electric circuit alerts some errors
automatically. You can dene “Fault” or “Problem” for general errors. See IM-Converter operation
IM 12A01F01-03EN Section 4.7
Contact for Error must connect to alarm related components including alarm lamp, alarm bell,
indicators.
The table below shows the relay operation. Go to Main screen and tap
to display contact
status. See
IM 12A01F01-03EN2.2 Main screen.
Contact
terminals
Normal operation
when power on
Alarm on when
power on
Power o󰀨
S1, S2, S3
NO
C
NC
NO
C
NC
NO
C
NC
S4
NO
C
NC
NO
C
NC
NO
C
NC