MYERS Illuminator Supernova Series, Installation Manual

Page: 33 / 131

32
115895B System Installation Manual
BACNET COMMUNICATION OPTION SECTION
SECTION 1
BACnet Communication Option Board
The BACnet Communication Option Board for the single-phase Illuminator
Supernova Emergency Lighting Central Inverter has two internal connections, the
RS232 communication bus and the input power. There are two external
connections, a RS485 output connector and a USB connection that is the
computer interface. For detailed operation on the protocol and commands for the
computer interface see manual 114063 RS-232 Communications. There are
also two dip jumpers that setup the baud rate and address. See Figure 1 for
locations of the connections.
Figure 1
– Outline of BACnet Communication Board
.
SECTION 2
Description of Operation
EBI acts as a simple B-ASC server device. It supports a total of 112 Analog Input
(AI), 67 Binary Input (BI) and 3 File (FI) objects. EBI is a full MS/TP master
device. The MS/TP MAC address is configurable via seven DIP switches, or
optionally using a soft-configured MAC address. EBI supports baud rates of
9600, 19200, 38400, 57600 and 115200. The device requires external network
biasing and termination resistors when it is used as an end-of-line device. The
MS/TP transceiver is optically isolated and the isolated ground is provided along
with + and - EIA-485 terminations.
You may configure the Device Object_Name and Object_Identifier and
Max_Master by writing to the appropriate Device object properties.
The built-in objects have a mostly fixed configuration of Object_Names,
engineering units and state text. AI objects have only required properties. BI
objects include fixed Inactive_Text and Active_Text property values, as well as
all required properties. Objects BI52 through BI67 correspond to input and output
contact statuses. The Object_Name property for these 16 objects are writable.