4.2.2 Node Controller Module indicators, switches and connectors
Table 6: Node Controller Module indicators, switches and connectors
Letters refer to labels in Figure 3.
Ribbon cable socket
(A)
Provides connections to the Display Module
(where fitted) and the Power Monitoring Module.
RS485 ports (B): see
wiring diagram,
Figure 17
These ports are intended for use by personal
computers, programmable logic controllers and
distributed control systems to allow remote
monitoring of the system. It uses the Modbus
RTU Slave protocol running at 9600 baud
(address map available on application).
There are two connectors to simplify "daisy-
chaining" of multiple systems (up to 32 Vortex
systems) which are electrically connected
together. The Vortex at the end of a Modbus chain
can use this second connector to attach a
terminator (120 Ohm).
OK LED (C)
This LED flashes once per second to indicate
normal operation
Fault LEDs (D)
These three LEDs are normally off. They indicate
a code for system faults (see section 6.4.3). If
more than one fault is present, the codes are lit in
sequence.
TXD LED (E)
This LED is normally lit and flashes when the
Node Controller Module sends data via the RS485
or RS232 connections.
RXD LED (F)
This LED is normally lit and flashes when data is
received via the RS485 or RS232 connections.
Internal sounder Provides audible warning of alarms and faults,
confirmation of button presses, etc. It can be
disabled using VortexPC.
Config socket
(RS232 connector)
(G)
This allows the connection of a personal computer
for the use of VortexPC to configure the Vortex
system. When a connector is inserted, the RS485
link is halted. Crowcon recommends that this port
should not be used for routine monitoring.
Accept/Reset (H)
This switch has the same function as the
ACCEPT/RESET button on the Display Module
(see section 4.6).
System Lamp Test (I)
This switch has the same function as the LAMP
TEST button on the Display Module (see section
4.6).
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