Fairbanks FB2550 SERIES - Manual (Page 120)

Section 5: Input/ Output
07/2012 120 51254 Rev. 3
5.15.4. MODBUS ( 30925 ), CONTINUED
COMMUNICATION LED
DEVICE STATUS LED
MODBUS INTERFACE
LED STATE DESCRIPTION
OFF No power - OR – no traffic
YELLOW Frame reception or transmission
RED A fatal error has occured
LED STATE INDICATION
OFF Initializine – OR – no power
GREEN Module initialized, no error
RED Internal error – OR –major unrecoverable fault
RED, SINGLE
FLASH Communication fault or configuration error
Case 1: Invalid setttings in Network Configuration error
Case 2: Settings in Network Configuration Object has been
changed during runtime (i.e. the settings do not match
the currently used configuration).
RED, DOUBLE
FLASH Application diagnostics available.
PIN DIRECTION SIGNAL COMMENT
Housing — PE Protective Earth
1 — GND Bus polarization, ground (isolated)
2 Output
3
5V Bus polarizatino power +5V DC (isolated
3 Input PMC Connect to pin #2 for RS-232 operation
4
5 Bidirectional B-LINE RS-485 B-Line
6
7 Input RX RS-232 Data Receive
8 Output TX RS-232 Data Transmit
9 Bidirectional A-Line RS-485 A-Line