MB40 & MB45 MODBUS TCP/IP Gateway
Page
4
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21
Getting Started
Configuring the MB40
Table 1: Connections to the MB40
Connection
Description
V +
Power Positive (8 to 28V DC)
GND
Power Negative (Ground)
D +
RS485 Data +
D -
RS485 Data -
GND
Ground
Male D9
Serial communications (RS232) between MB40 and Weather Station
RJ45 Socket
Ethernet Port
Table 2: MB40 LED Functions
LED
Function
Red Tx LED (next to RS485 terminal)
Indicates serial communications received on RS485
Green Rx LED (next to RS485
terminal)
Indicates serial communications sent (Modbus RTU) on
RS485
Green Rx LED next to D9 connector
Indicates serial communications received (from weather
station) on the serial port
Red Tx LED next to D9 connector
Indicates serial communications sent on the serial port
Green LED (right side) on RJ45 socket
Link LED. Always on to indicate good status for Ethernet,
flashes to indicate activity.
Yellow LED (left side) on RJ45 socket
FDX LED.
On = Full duplex Ethernet
Off = Half duplex Ethernet
Green Rx LED next to RJ45 socket
Flashes when packets are received on the Ethernet port.
Red Tx LED next to RJ45 socket
Flashes when packets are sent on the Ethernet port.
