FOXBORO 871FT-2D1A1C-3-ST-A

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FOXBORO 871FT-2D1A1C-3-ST-A IO module In Stock

In place of the transfer system above, a 2-position nozzle seal switch is available. Moving this 

switch to the manual (M) position, seals the nozzle line causing the output to increase to the supply

 pressure. The output can now be set to the desired value by reducing the pressure with an 

external supply regulator furnished by the user.

Turn set point knob (or adjust remote set point, if present) so that set point index is in line with 

measurement pointer. Move switch to automatic (A). Quickly increase air supply pressure to 

20 psi (140 kPa).

Slowly reduce air supply pressure to output pressure, and move switch to manual (M). Valve can 

now be controlled with regulator.

For on-off, differential gap, or automatic shutdown controllers, see page 14.

1. Make sure that measuring system is properly installed and operating.

2. Set control dial so that index points to desired control action (output either increases 

or decreases with increasing measurement).

With latch in lowered position (as shown below), control dial cannot be accidentally 

rotated to area of reverse control action.

To reverse control action, push up latch and rotate dial so that latch is on other side of 

stop, then push down latch (see figure below).

3. Turn PROPORTIONAL BAND adjustment (on control dial) to 400 or to safe high 

value.

Turn DERIVATIVE adjustment (if present) to 0.05.

Turn RESET adjustment (if present) to 50 or safe high value.

4. Open shutoff valves and close bypass valve.

5. Turn set point knob (or adjust remote set point, if present) so that set point index is at 

desired value.

6. If controller is not equipped with optional automatic-manual transfer, proceed to 

Step 7. If controller is equipped with transfer, start up in manual as follows:

a. Move transfer switch to manual

Product details:

FOXBORO 871FT-2D1A1C-3-ST-A IO module

Contact information：

Contact person：Luna Chen

Email Address:：sales6@saulplc.com

WhatApp： +86 13358378970

We look forward to your inquiry and will get back to you as soon as possible.

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