User Manual

26 GOSSEN METRAWATT GMBH
Transmission Speed 2400 baud, each frame is transmitted 3 times
Frame Format 1 start bit, 8 data bits, 1 stop bit, no parity, no xon/xoff,
no handshake
Frame Content Device ID, measured value, measuring range, measurement type
Receiver
Power Supply 9 V monobloc battery in accordance with IEC 6LR61
(alkaline-manganese). Internal battery is disconnected if power is
supplied from the PC.
Supply Voltage 7 … 12 V
Dimensions W x H x D:
65 x 100 x 24 mm
Weight 150 gr. with battery
Connector Cable approx. 15 cm long
Attention!
!
The length of the cable between the receiver and the PC may not exceed 3 meters
due to EMC considerations.
RS232 Interface Connector Pin Assignments
The 9 pin Cannon connector at the
receiver is configured as follows:
1: NC
2: Data to PC
(receiver)
3: Control wire
auxiliary power
4: NC
5: Ground
6: NC
7: NC
8: NC
9: Power supply
from PC
9876
54321
TxD
GND
7...12 V
DC ON/OFF
Measuring Range
Switch code:
0011 0001B=250 V
0011 0010B=16 A
0011 0011B=open
0011 0100B=I-Diff
0011 0101B=2 mA
0011 0110B=open
0011 0111B=I-EA
0011 1000B=20 MΩ
0011 0000B=20 Ω
ASCII Characters
Device Name
ASCII Characters
Measurement Value
Overflow = 9999
„Line Feed“
Frame
UU_AXX 1234S C c
r
L
F
Checksum
ASCII for low nibble
„Carriage Return“=0Dh
1. ASCII “A” byte = 41h
2. Device ID byte
high byte, ASCII:
0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
A, B, C, D, E, F
3. Device ID byte
low byte, ASCII:
0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
A, B, C, D, E, F
2 ASCII
characters for
addressing the
receiver
UU=55H, 55H
These
characters are
not included in
the checksum.
1 Byte
Pause
=0Ah