JVL MAC050 - Page 149

JVL A/S - User Manual - Integrated Servo Motors MAC050 - 4500 145
5.2 Expansion Module MAC00-B1/B2/B4
5.2.7 RS485 - General description when using a MAC00-Bx module
The RS485 offers more noise-
immune communication com
-
pared to the RS232 interface.
Up to 32 motors can be con-
nected to the same line.
When connecting the RS485
interface to a central control
-
ler, the following rules must
be followed:
1: Use twisted-pair cable
2: Use screened cable
3: Ensure that GND is also
connected.
4: Ensure that all units have a
proper connection to safety
ground (earth) in order to re
-
fer to the same potential.
5: The last unit in each end of
the network must be termi
-
nated. Note that the B1, B2
and B4 modules all contain a
termination resistor which
can be activated.
6: Ensure that the supply lines
are connected individually in
order to minimise the voltage
drop between the motors.
7: Master Controller RS485
interface:
If available, it is strongly rec-
ommended a type with opti-
cal isolation is used.
Connectors:
Please read the individual de-
scription for the MAC00-B1,
B2 or B4 to see the connector
layout.
Central
Controller
(for example a PC)
MAC50-141
Motor
RS485 network with 2 x MAC140 and 1 x MAC800
mounted with MAC00-B1, B2 or B4 modules.
MAC50-141
Motor
MAC800
Motor
Power supply
A
A
A
A
P+
P+
P+
B
B
B
B
P-
P-
P-
RS485
Interface
Screen connected
to GND in each end
Opto isolation *
**
**
** The last unit at each end of the line must be terminated. The MAC00-B1, B2
and B4 contain this feature. See the individual module descriptions.
Make sure that all
involved units are
connected to the same
potential
RS485
Interface
RS485
Interface
Up to 32
Motors
Power
Supply
Power
Supply
Power
Supply
Mains 230VAC
Control voltage
Only MAC50-141
with B2 or B4
Control voltage
Only MAC50-141 with
B2 or B4 (Optional)
GND
GND
+18-32VDC
(control voltage) +8-48VDC (Bus voltage)
GND
GND
GND
O+
O+
Main supply
ScreenScreen Screen
Max. 32VDC !
* Opto isolation is recommended.
*** Each unit connected must be setup with an address via The MacTalk program.
If only one unit is connected no address is needed.
*** Address=1
*** Address=2
*** Address=3
TT1049GB