BRS BIM1, Instruction Manual, Page: 31 / 36

Battery Impedance Meters
BRS Messtechnik GmbH Page 31 of 36 Version 1.7 / April2015
9 RS232 Communication
Optionally the instrument can be equipped with a RS232 or RS422 interface instead
of the standard USB interface
11
. In this case the instrument acts as DCE.
The pinning of the SubD9 connector is as follows:
Pin RS232 RS422
1 nc out: TxD-
2 out: TX out: TxD+
3 in: RX in: RxD+
4 nc in: RxD-
5 Gnd-Signal Gnd-Signal
6 nc nc
7 +Uin-Power +Uin-Power
8 nc nc
9 Gnd-Power Gnd-Power
The communication parameters are:

Baudrate: 57600 Bd

Databits: 8 bit

Parity: N

Stopbit: 1
11
With RS232 the distances are limited to 3m…5m. For longer distances RS422 should be used.
The power supply is not galvanically
isolated.
The supply voltage can be between
8V and 30V.