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S1-4
opened. External set must be disconnected.
setpoint,
when used with the O-10 V in/out setup, requires DIP
I
switch
setpoint
command is present on a controller when powered-up and the valve
is not switched off, the valve will drift wide open.
‘The internal
#l must be in the “internal source” position. If no
setpoint
input is not connected to some type of com-
mand control device, the valve-off function must be activated or DIP
switch
0-1OV.
NOTE: If the
setpoint
command pot even though the output is
0-W
0-1OV
output, DIP switch 1 is moved to the right-hand
position and DIP switch 4 must be in the left-hand (open) position. This
allows the controller to operate from the internal (or external local)
setpoint
is
to be used with a
setpoint
input is
intended to be provided externally by the user.
If the internal
O-1OV
setpoint
command pots. The reference provides approximately 0.125 volts
headroom to allow for external cabling and ensures the ability to always
reach full scale when using these inputs. The
setpoint
is less than 2% of full scale.
Move this switch to the left to disable auto shut-off.
A 5.1 VDC reference is provided for internal and external
setpoint
and output match at full scale.
Move DIP switch 5 to the right to have the controller valve forced shut
(auto shut-off) whenever the
VR12
to ensure that the
setpoint
signal you may need to adjust
mA
setpoint
and you
decide to switch to a 4-20
setpoint
input. Move these switches to the left to select O-5 VDC setpoint. If
your FMA-1900 was originally set up for O-5 VDC
mA
setpoint
potentiometer.
Move DIP switches 2 and 3 to the right to select 4-20
setpoint
potentiometer. Move this switch to the left (OFF) to select an
external setpoint, which you must supply. This is also the position
required if you choose to use a local
1
to the right (ON) to select the internal on-board
setpoint
with positive shut-off enabled or disabled.
A factory installed option of O-1 0 VDC in and out is also available.*
Move DIP switch
mA
setpoint
with positive shut-off enabled or disabled and externally
sourced 4-20
setpoint
command potentiometer (accessible through a hole
in the case) and the positive shut-off option enabled.
Other options include internally or externally sourced O-5 VDC
setpoint
using the
on-board
setpoint
operation and the Positive Shut-Off feature.
The default configuration is for an internal O-5 VDC
-
The DIP switches on the FMA-1900 flow controller are used to
configure
m
Setpoint
Configuration3.9