HMS Anybus CompactCom B40-1 Design Manual page 41

Host Interface
Pin Signal Name
52
TX / OM3
32 OM0
33 OM1
35 OM2
54
MI0/SYNC
53
MI1
30 MD0
3 RESET
It is important to connect all signals correctly for proper functioning of the serial interface.
3.6.3 Baud Rate Accuracy
As with most asynchronous communication devices, the actual baud rate used on the Anybus
CompactCom may differ slightly from the ideal baud rate.
The baud rate error of the module is less than ±1.5%. For proper operation, it is recommended
that the baud rate accuracy in the host application lies within ±1.5% from the ideal value.
Anybus ® CompactCom B40-1 Design Guide
Pin Type
Description/Comments
O, I Transmit Output
• Direction: CompactCom -> Host application
• Idle state = High
This pin doubles as OM3 strapping input on Anybus CompactCom
M40 modules. Connect a pull-up resistor on the application for this
pin in serial mode.
I
Operating mode [OM2, OM1, OM0]:
001
010
011
100
For more information see
O
See Module Identification, p. 16
O
See Module Detection, p. 16
I See RESET (Reset Input), p. 18
Serial 19.2 kbps
Serial 57.6 kbps
Serial 115.2 kbps
Serial 625 kbps
Operating Modes, p.
39 (78)
16.
HMSI-27-230 3.4 en-US