Rice Lake CB-2 Concrete Batch Controller Version 1.0 - Manual (Page 9)

Installation 5
2.1 Important Notes
2.1.1 Two Power Sources
The CB-2 requires two separate power sources to run. The power cord that came wired to your CB-2 ONLY
powers the electronics. This power should come from a quality UPS with power conditioning. This clean power
must be separated as far as possible (distance in the electrical circuit) from the power source used to power the
motion control on the batch plant.
Another power source must be brought into the CB-2 to power the I/O (output relays), that control the plant. No
power cord is supplied because this power must be brought directly from its own circuit or fed from another
manual panel.
2.1.2 I/O Power and Manual Panel Same Phase Power
The CB-2 and manual panel will both be wired to the same I/O points for most plant controls (exceptions are air
compressors or other equipment the CB-2 doesn’t control in automatic mode). Because of this, it is critical that
the 120V “hot” that is used for the CB-2 I/O power, is the same “hot” phase used by the manual panel.
2.1.3 Unused Inputs Must be Jumpered to 120V
The CB-2 uses 120V input signals from various sensors for positive and negative feedback. At a minimum, the
CB-2 requires the following signals:
• Cement discharge gate closed (Terminal 4-13 - Rack 2, Point 7)
• Aggregate discharge gate closed (Terminal 4-15 - Rack 2, Point 8)
• Aggregate conveyor running (Terminal 4-9 - Rack 2, Point 5)
• E-Stop not pressed. This is fed 120VAC from inside the CB-2 automatic panel if 120V I/O power is
supplied
If your plant is not equipped with any of these sensors, you must get 120VAC to these inputs to satisfy the CB-2
interlocks. The best place to get 120VAC is to jumper from terminals 6, 7, 8 on the top row of the main junction
block.