UVM-1000
LIT-12013155
12
Due to continuous improvement, Triatek reserves the right to change product specifications without notice.
Normal-Reverse Operation
The valve actuator can be set for normal/reverse operation.
This is to ensure that the various desired failsafe actions can be
achieved.
The failsafe modes include loss of power and loss of signal. The
UVM has a setting, either through the UVM Configuration Tool or
by DIP switch (if enabled) to select its Normal-Reverse Mode of
operation.
Set the Normal – Reverse acting DIP switch (if enabled), or
check/uncheck the reverse operation check box in the Misc Tab
of the UVM Configuration Tool to the desired mode of operation.
If the reverse setting is selected, then for revisions 0.75 and
upwards, the actuator needs to be set to reverse acting, and
the command signal from the third party controller needs to be
inverted (reverse operation).
In this case (reverse operation) the signal from the OEM
controller will be 10 – 0 V for 0 – xxxx cfm, and the actuator
output control signal from the UVM will be 20 – 4 mA for 0 –
100% positioning.
The feedback signal will always be 0 – 10 V for 0 – xxxx cfm,
it is never inverted.
For normal operation, typically used for supply valves, the
settings shown in Figure 8* are recommended.
For reverse operation, typically used for exhaust and hood
valves, the settings shown in Figure 9 are recommended for
UVM revisions 0.75 onwards. Earlier revisions do not invert the
UVM input signal.
*Figures 8 and 9 are on next the page.
