Brochures and Data Sheets

NetSure
™
ACU+ Controller (Advanced Control Unit Plus)
User Instructions, UM1M820BNA (Issue AK, March 3, 2014)
Spec. No: 1M820BNA, 1M820DNA Code: UM1M820BNA
Model No: M820B, M820D Issue AK, March 3, 2014
6
• The Controller commands some rectifiers to standby in
rotation.
Refer to “Rectifier Control” on page 2 for further description.
Power Split Feature
The Power Split feature allows you to connect the power system
controlled via the ACU+ to an existing DC power system instead of
extending or completely replacing the existing DC power system.
The power system controlled via the ACU+ functions as a slave
system to share load (split output) with the existing system
(master system) that requires expansion. The ACU+ does not
require communication with the master system’s Controller.
The Power Split feature provides for the sharing of total load in a
controlled manner between the paralleled power systems.
When Power Split is programmed, the ACU+ adjusts rectifier
output voltage per load demands to ensure proper sharing
between the slave and master power systems. See Figure 5.
Figure 5. Power Split Feature
Diesel Management Feature
The Diesel Management feature is available when an SM-AC
supervisory module is connected to the ACU+ Controller. The
Diesel Management feature consists of a Diesel Test. The Diesel
Test can be performed at specific intervals or a User can manually
start the Diesel Test. The ACU+ records the test results.
PLC (Programmable Logic Controller) Function
The PLC function allows a User to create "control program lines" by
combining equipment analog signals, parameters, and alarms in a
sequence that controls equipment and/or operates relays.
Control program lines are created using the WEB Interface. See
“PLC Sub-Menu” on page 145.
Refer to Table 2 for available logical components.
Supervisory Module (SM Modules) Monitoring
Various devices (supervisory modules) can be connected to the
ACU+ Controller to extend its monitoring capabilities.
Hybrid Control Function
Hybrid Control is designed for use in new installations or as an
upgrade of existing sites powered by a diesel generator(s) when
grid power is not available. The Hybrid Control is also applicable to
sites with highly unreliable or frequently unavailable grid power
connection. The primary power source is still considered to be the
diesel generator(s).
Note:
The Hybrid Control function requires a specific configuration.
Hybrid Control menus will not normally be displayed unless
your ACU+ has been configured by Emerson for this function.
Contact Emerson for a Hybrid Control configuration.