YOKOGAWA FLXA402 Troubleshooting guide

TNA2001
Quick Start-up Guide
How to wire and set up the relays on the FLXA402
1. Wiring Relays
a. Cut any power to the analyzer
b. Unwire any sensor or OI connected to the upper rail. This will make it easier to
access the relays.
c. Remove the cover over the relays, but unscrewing the 2 phillips head screws ( they
are captive), and pulling straight out.

TNA2001
Quick Start-up Guide
How to wire and set up the relays on the FLXA402
d. Wire the desired contacts.
S1 is the left more set of terminals 31-33 and S4 is the right most set of terminals
71-73. Note that the center terminal of each set is the common terminal with the

TNA2001
Quick Start-up Guide
How to wire and set up the relays on the FLXA402
NC terminal on the left and the NO terminal on the right. Below is the state of each
relay during alarm, error, and power off.
e. Replace relay cover
f. Rewire sensors and OI
2. Relay Setup in Analyzer
a. Turn analyzer on
b. Press the analyzer menu button
c. Press Setting

TNA2001
Quick Start-up Guide
How to wire and set up the relays on the FLXA402
d. Press “Contact output settings (R)”

TNA2001
Quick Start-up Guide
How to wire and set up the relays on the FLXA402
e. Select the contact you wish to set up
f. Select what you want to trigger the contact

TNA2001
Quick Start-up Guide
How to wire and set up the relays on the FLXA402
Options for S1, S2, and S3 include Alarm, Hold, Wash, Error, USP, Simulate, and Off.
S4 options include Alarm, Error, Simulate, and Fail safe. For a full description of
each option, see Chapter 4.4 in the FLXA402 Operation Manual.
Once an item is selected, the analyzer will return to the previous screen. The save
icon in the top right must be pressed for any changes to be stored.
g. Finish setting up the contact
The remain of the contact options page is setup options for each of the contact
trigger. Now scroll down to the selected trigger’s section and set the desired
values.

TNA2001
Quick Start-up Guide
How to wire and set up the relays on the FLXA402

TNA2001
Quick Start-up Guide
How to wire and set up the relays on the FLXA402

TNA2001
Quick Start-up Guide
How to wire and set up the relays on the FLXA402

TNA2001
Quick Start-up Guide
How to wire and set up the relays on the FLXA402
Be sure to press to store any changes before exiting the contact option page.
For additional details on each option refer to section 4.4 in the FLXA404 operation
manual Operation Manual