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Communication operation and setting
(1) Specifications
Communication specifications (conforming to BACnet standard of physical medium EIA-485)
Item
Physical medium
Connection port
Data transfer method
Baud rate
Start bit
Data length
Parity bit
Stop bit
Network topology
Communication method
Communication protocol
Maximum connection
Node number
Master
Supported property of BACnet
standard object type
Supported BIBBs (Annex K)
BACnet standard device profile
(Annex L)
Segmentation
Device address binding
REMARKS
• This product conforms to BACnet Application Specific Controller (B-ASC).
• This product is designed for multiple master network, therefore 2-wire type connection is supported.
Node with network bias resistors
This product is a node with local bias resistors. Therefore at least one node must be a node with network bias resistors
in the network configuration.
When configuring the network with only this products, refer to the following, and make the node with network bias
resistors. (When using two sets in one segment, insert them into both ends of the network.)
Other node
250
EIA-485 (RS-485)
RS-485 terminal (PU connector is not available)
NRZ encoding
9600bps, 19200bps, 38400bps, 76800bps
Fixed to 1 bit
Fixed to 8 bits
Fixed to none
Fixed to 1 bit
Bus topology
Token passing (token bus)
Master-slave (only the master is available for this product)
MS/TP (master-slave/token passing LAN)
255 (up to 32 for one segment, addition with a repeater is available)
0 to 127
0 to 127 (this product is the master)
Refer to page 252
Refer to page 260
Refer to page 260
Not supported
Not supported
RDA1
RDB1
RDA2
(RXD1+)
(RXD1-)
(RXD2+)
(RXD2-)
SDA1
SDB1
SDA2
TXD
(TXD1+)
(TXD1-)
(TXD2+)
P5S
SG
P5S
(VCC)
(GND)
(VCC)
Description
RDB2
RXD
SDB2
(TXD2-)
SG
VCC
(GND)
Connect two 510
(1/4W) resistor.
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