HMS Anybus CompactCom B40 Modbus Serial User Manual page 18

Hardware Design
Pin Signal
Name
51 RX
52
TX / OM3
32 OM0
33 OM1
35 OM2
54 MI0
53 MI1
30 MD0
3 RESET
4.1.2 Power Supply Pins
Signal
GND
3V3
Anybus ® CompactCom ™ B40 Modbus Serial User Manual
Type Notes
I
Receive Input for Modbus communication
• Direction: Host application -> Anybus CompactCom
• Idle state = High
Transmit Output for Modbus communication
I/O
• Direction: Anybus CompactCom -> Host application
• Idle state = High
This pin doubles as OM3 strapping input on Anybus CompactCom. Connect a pull-
down resistor on the application for this pin in Modbus serial mode. The pull-down
resistor shall have a value between 1 kΩand 2.2 kΩ.
I
Set [OM2, OM1, OM0] to [0,1,1]
For more information see
I
I
O Low at power-up and before reset release.
See Settings , p. 17
Please not that this pin can be used as SYNC pin PROFINET. Used at conformance
testing.
O Tied to 3V
See Settings , p. 17
O
Tied to GND
See Settings , p. 17
I
See RESET (Reset Input), p. 18
Type
Pin
Power 2, 8, 14, 18, 24,
28, 34, 40, 44,
50, 56
Power 1, 55
Settings , p. 17.
Description
Ground
Power and signal ground reference.
3.3 V power supply.
16 (48)
SCM-1202-130 1.1 en-US