4.4Optional Equipment, Level Switches and Communications Options
Optional equipment for the Digital Dosing Additive Feeder includes:
Alarms
Several alarm options are available for the Digital Dosing feeder. The standard unit comes
with a flashing alarm symbol 
on the faceplate. Options include both audible horns and flashing lights. An optional no voltage alarm relay can be connected to the user’s central alarm system.
Level switches (probes)
To adjust the level switches:
1.Turn the controller ON.
2.Fill the dosing station until the level sensor is
3.Remove the small plastic screw (M3) on the back of the level sensor (see Figure 7).
LED Yellow (Station) | LED Green (Level Probe) |
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on: Station Filled | on: Power Supply Available |
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off: Station Emptied | off: Power Supply Not Available |
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| npn: Normally Closed |
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| npn: Normally Open | ||
| pnp: Normally Open 1 |
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| 0 pnp: Normally Closed | |||
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| Blind Lid |
Protective Screw | |
Plastic Screw M3 | Cable |
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Level Probe
Figure 7. Level Sensor Screw
4.Turn the
Digital Dosing Units | 44 |
