28
MOVIDRIVE
®
MD_60A Operating Instructions
Connection option USS21A (RS-232 and RS-485)
4.9
Connection option USS21A (RS-232 and RS-485)
Part number USS21A: 822 914 7
RS-232
connection
•
Use a shielded standard interface cable for connecting to the RS-232 interface.
RS-485
connection
Please observe the following connection instructions:
•
Use a 2-core twisted and shielded copper cable (data transmission cable with shield
comprising copper braiding). The cable must meet the following specifications:
– Conductor cross section 0.5 – 0.75 mm
2
(AWG 20 – 18)
– Cable resistance 100 – 150
Ω
at 1 MHz
– Capacitance per unit length
≤
40 pF/m (12 pF/ft) at 1 kHz
The following cable is suitable, for example:
– BELDEN (www.belden.com), data cable type 3105A
•
Connect the shield at either end to the electronics shield clamp of the inverter and
ensure the shield is connected over a large area. Also connect the ends of the shield
to DGND.
EIA standard
The RS-485 interface of the USS21A corresponds to the EIA standard:
•
Max. transmission rate 9600 baud
•
Max. 32 participants (each unit with USS21A counts as 2 participants)
•
Max. cable length 200 m (660 ft) in total
•
Dynamic terminating resistor with fixed installation
02399AEN
Fig. 21: Connection cable USS21A – PC
RxD
TxD
2
2
3
3
5
5
max. 5 m (16.5 ft)
USS21A
PC COM 1-4
5
5
3
3
2
2
2
3
5
5
3
2
9-pin sub D connector (female)
9-pin sub D connector (male)
GND (ground)
00997CXX
Fig. 22: RS-485 interface of the USS21A
+
+
-
-
0V5
0V5
USS21A
USS21A
1
2
3
1
2
3
y
y
y
y
Summary of Contents for MOVIDRIVE MD*60A Series
Page 3: ...MOVIDRIVE MD_60A Edition 09 2001 Operating Instructions 1053 2617 EN ...
Page 4: ...SEW EURODRIVE ...
Page 100: ...10 2000 ...
Page 101: ...10 2000 ...
