AERCO C-More Controls - Manual (Page 94)

APPENDIX F
APPENDIX F - C-MORE CONTROL PANEL DIP SWITCHES
F-1. INTRODUCTION
The PMC (Primary Micro-Controller) Board in the C-More Control Panel Assembly contains two 4-position
DIP switches (S1, S2) as shown in Figure F-1. The functions of these DIP switches are as follows:
• 4-Position DIP switch S1 (Detail “A”) is used to select either current or voltage as the Remote
Signal Source when operating in the Remote Setpoint or Direct Drive Mode. The factory default
for this switch is current (CURR).
• 4-Position DIP switch S2 (Detail “B”) is used to enable a terminating (TERM) resistor and bias
(BIAS1, BIAS2) when it is the last unit on a RS485 (Modbus) Network chain. The factory default
setting for this switches is OFF. Refer to Modbus Communication Manual GF-114 for additional
information on setting these switches
The following procedures provide the instructions necessary to access the DIP switches on the PMC
Board and select the required settings.
F-2. ACCESSING AND SETTING PMC BOARD DIP SWITCHES
The following procedures provide the instructions necessary to access the DIP switches on the PMC
Board and select the required settings.
1. Remove power from the C-More Control Panel.
2. Loosen and remove the four (4) screws securing the front panel assembly to the chassis as shown in
Figure F-2. The horizontal panel configuration shown in Figure F-2 is for a KC1000 unit. Benchmark
units utilize a vertical panel layout, however removal is identical for both configurations.
3. Carefully separate the panel from the chassis. Use care to avoid applying undue stress to the ribbon
cable connected between the back of the panel and the chassis-mounted printed circuit boards.
CAUTION
The C-More Controller Printed Circuit Boards contain electronic components that
are sensitive to electrostatic discharge (ESD). Prior to performing the following
steps, put on an anti-static wrist strap and connect the clip lead to earth ground.
Failure to observe this precaution may result in permanent damage to on-board
ESD-sensitive components.
4. Put on an anti-static wrist strap and attach the clip lead to earth ground.
5. From the back of the Panel Assembly (Figure F-3), locate the 4-position Curr/Volt DIP switch S1
shown in Figure F-1 (Detail “A”) on the PMC Board. All 4 positions of switch S1 should currently be
set to the ON (Up) position which is the factory default setting of current (CURR). If your installation
will utilize voltage as the Remote Signal source, set all 4 positions of S1 to the OFF (Down) position
to select voltage (VOLT).
6. If the C-More Control Panel is the last unit in a RS485 Network chain, it will be necessary to activate
the RS485 4-position DIP switch S2 shown in Figure F-1 (Detail “B”). Refer to GF-114 Modbus
Communication Manual prior to changing the switch setting.
7. After the DIP switches have been set, reposition the Front Panel Assembly on the chassis and secure
it in place with the four screws.
8. This completes the procedure for setting the DIP switches. Return the unit to service use.
F-2