Terminating Resistor; Decision-Makerr 3+ Controller Configuration; Decision-Makerr 550 Controller Configuration; Service Disassembly - Kohler Decision-Maker 1 Manual

8.18.2 Terminating Resistor

Each RSA is shipped with a terminating 121 ohm
resistor connected to P27 terminals 4 and 5. Determine
the need of the resistor based on the following three
applications.
D
RSA master only.
121 ohm resistor is connected to P27 terminals 4 and
5 on the RSA master.
D
RSA master with up to three RSA slaves. Verify
that the terminating 121 ohm resistor is connected to
P27 terminals 4 and 5 on the last RSA slave in the
daisy chain connection. Remove 121 ohm resistor
connected to P27 terminals 4 and 5 on the RSA
master and all RSA slaves except the last RSA slave.
D
RSA master with more than three RSA slaves.
Connect the terminating 121 ohm resistor in series
with a 0.1 MFD, 50-volt capacitor, part GM28875-1
(not supplied) to P27 terminals 4 and 5 on the last
RSA slave in the daisy chain connection. Remove the
121 ohm resistor connected to P27 terminals 4 and 5
on the RSA master and all RSA slaves except the last
RSA slave.
8.18.3 Decision-Makerr 3+ Controller
Configuration
The RSA requires a controller with a MODBUSr
address #1 and a baud rate of 19200. The controller
baud rate is fixed at 19200.
Set controller MODBUSr address to #1 by placing DIP
switches 6, 7, and 8 to open position. See Figure 8-40.
1 2 3
1. Push this side down to open circuit.
Figure 8-40 16-Light Controller DIP Switches
Modbusr is a registered trademark of Schneider Electric.
TP-6356 4/12
Verify that the terminating
4 5 6 7 8
OPEN
Note: After setting DIP switches to the generator set
application, be sure to power down and then
power up the controller. Either disconnect the
battery and then reconnect the battery of the
generator set, use the prime power switch (if
equipped), or remove and then replace the F2
controller fuse.
acknowledge the DIP switch change until after
generator set controller is powered up.
8.18.4 Decision-Makerr 550 Controller
Configuration
The RSA requires a controller with a MODBUSr
address #1 and a baud rate of 19200.
Note: Refer to installation instructions furnished with
RSA.

8.18.5 Service Disassembly

Should it be necessary to separate the RSA annunciator
panel from the RSA circuit board for servicing and/or
replacement, first unlock the P28 connector on the RSA
circuit board before removing the ribbon connector to
avoid circuit board damage. See Figure 8-41. Carefully
slide the locking device (white plastic) outward
approximately 1.5 mm (1/16 in.).
1. Slide the P28 connector locking device before
removing the ribbon connector.
Figure 8-41 RSA Annunciator Panel and RSA Circuit
1
6126
Section 8 Component Testing and Adjustment
The controller will NOT
Board (back view of front panel)
1
GM34433
145