28
Subject to change without notice
RS-232 Interface
A bi-directional interface is available for remote controlling. A D-Sub
connector (9-pin, female) is located at the back panel of the LISN; the
communication with a computer according to the RS-232 standard is
supported.
Pin
2
Tx Data (data from LISN to computer)
3
Rx Data (data from computer to LISN)
5
Ground
9
+5V supply voltage for external devices (max. 30 mA).
The standard voltage level at the Tx, Rx terminals is ±12 Volts.
Interface configuration:
– 9600 baud
– 8 data bits
– 2 stop bits
– no hardware protocol
RS-232 Commands
The LISN interprets the following remote control commands.
Please consider the lower/upper case letters.
Command Function
Indication
R
Remote control enabled
RM LED lit
O
Local control
RM LED dark
P
Protect. ground line sim. circuit on
PE LED lit
p
Protect. ground line sim. circuit off
(bypass)
PE LED dark
N
EMC test signal of line N
N LED lit
n
EMC test signal of line L1
L1 LED lit
L
Transient Limiter off
OFF LED blinking
l
Transient Limiter activated
OFF LED dark
Setting into operation
Read the operator’s manual before setting up the HM6050-2!
Only qualified personnel are allowed to set up the LISN for operation.
HM6050-2 has been designed in conformity to regulations VDE 9876
and CISPR Publ. 16. The leakage current of the instrument exceeds the
allowed value of 0.5 mA
eff
as defined in IEC 348 and VDE 411 for
normally operating measurement instruments. Thus, the safety
requirements have to be accomplished by additional provisions
