BRS BIM1 - 9 RS232 Communication

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.