72-900-06 Rev. F
Page 5 of 38
Drum Levels
Three (3) onboard dry contact inputs serve as Drum Level inputs. When a low level is
detected the unit will go into an alarm state and the low drum’s identity will be displayed
on the screen. The user can program the alarm to deactivate a timer if desired. Drum
level #1 is assigned to timer #1, drum level #2 is assigned to timer #2 and drum level
#3 is assigned to timer #3.
Flow Switch
MicroVision
EX
has a dry contact flow switch input that will de-activate all of the control
output relays upon a no-flow indication. An alarm condition will be indicated and “Flow
Switch Alarm” will be displayed. This input is active closed:
Open = no flow; closed = flow.
If a flow switch input or other alarm condition exists, the LED’s on the front
panel will flash until the alarm condition is cleared.
4-20mA Outputs and Inputs
Optional 4-20mA inputs or outputs can be installed to increase the capabilities of the
MicroVision
EX
. Connect 4-20mA equipment to the + and – terminals as shown on page 9.
Water Meter
MicroVision
EX
has a dedicated water meter input that is capable of reading a dry contact
or Hall effect type water meter. Through programming this input can be used to signal a
pulse timer as well as totalizing water consumption. Some models offer up to six (6)
water meter inputs.
Alarm Relay
MicroVision
EX
has a dedicated dry contact relay that can be used to interface with process
control equipment or visual indicators. This relay is un-powered.
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