Honeywell SMV 3000 user manual Cutting Failsafe Jumper, Step Action

Models: SMV 3000

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8.3Changing Default Failsafe Direction, Continued

Procedure, continued

Table 26 Cutting Failsafe Jumper

Step

1

2

3

4

5

Action

Connect SCT to SMV and establish communications. (See subsection 5.2 for procedure, if necessary.)

Be sure any switches that may trip alarms or interlocks associated with analog loops are secured or turned off.

Open the Status Tab Card. Read and record the gross and detailed status messages of the transmitter.

Turn OFF transmitter power. Loosen end-cap lock and unscrew end cap from electronics side of transmitter housing.

Release retaining clip and unplug flex tape and power connectors from Main PWA underneath module. Unplug temperature input connector from Daughter PWA underneath module. Loosen two captive mounting screws on top of module, and then carefully pull module from housing.

6

7

8

ATTENTION You may be able to cut the failsafe jumper without removing the molding and Daughter PWA as noted in this Step and the next one. Just be sure you can identify the jumper and don’t damage other components in the process of cutting it.

Remove screw holding connector molding/retaining clip to Main PWA and remove molding.

Remove two retaining screws and carefully pull Daughter PWA straight up to unplug it from connector on Main PWA.

With component side of PWA facing you, locate failsafe jumper and cut it in half with small wire cutter such as dykes. See Figure 27. This changes failsafe action from upscale to downscale.

9

Reverse applicable previous steps to replace PWA/module.

Continued on next page

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Page 108
Image 108
Honeywell SMV 3000 user manual Cutting Failsafe Jumper, Step Action