Input Switches - Blue I HydroGuard HG-302 Manual De Uso

3.4.3 Input Switches

An input switch terminal block on the I/O module allows for three input switches to be connected to the
system as additional layers of security against accidental chemical additions. If a connection is not detected
at each input, the controller will not activate any equipment or dose any chemicals. Therefore, if a safety
switch (flow, level, etc.) will not be installed, a fixed connection (jumper wire) is required to allow the
controller to operate. The switch connections are:
Input Switch 1 (between input 1 and 2): open connection with factory installed jumper
Input Switch 2 (between input 3 and 4): connected to rotating flow switch, Figure 7, on the flow cell
Input Switch 3 (between input 5 and 6): external flow switch connection with factory installed jumper
Caution: An external flow switch is required between points 5 and 6 on the input switch terminal
block. The controller will not feed any chemicals if this connection is not present, therefore, t he
controller has a jumper wire pre-installed to allow for initial set-up and testing; however Blue I
Technologies does not recommend operating the controller with this jumper installed unless a flow
meter is used in place of the flow switch.
Figure 7: Rotating Flow Switch
15