JVL MAC050 User Manual page 105

4.3 Expansion module MAC00-B41
4.3.8 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.
The RS485 interface in the
MAC00-B41 module is gal-
vanical isolated.
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
refer 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, B41 modules all
contain a termination resis-
tor 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 op-
tical isolation is used.
Connectors:
To see the specific connector
pin-out please see the chapter
Expansion MAC00-B41 con-
nector description, page 105.
A finished RS485 cable also
exist. Please see Cables for the
MAC00-B41, page 107
JVL Industri Elektronik A/S - User Manual - Integrated Servo Motors MAC050 - 800
RS485 network with 2 x MAC140 and 1 x MAC400
mounted with MAC00-B1, B2, B4 and B41 modules.
Central
Make sure that all
involved units are
Controller
connected to the same
(for example a PC)
potential
Opto isolation *
**
Screen connected
to GND in each end
MAC50-141
with B1, B2 or B4
A
B
GND
Power
Supply
Control voltage
Only MAC50-141
with B2 or B4
MAC50-141
with B1, B2 or B4
A
B
GND
Power
Supply
Control voltage
Only MAC50-141 with
B2 or B4 (Optional)
MAC800 Motor
with MAC00-B41
A
**
B
GND
Contr. Voltage CVI
Main supply
Up to 32
Motors
* Opto isolation is recommended.
** The last unit at each end of the line must be terminated. The MAC00-B1, B2
and B4, B41 contain this feature. See the individual module descriptions.
*** Each unit connected must be setup with an address via The MacTalk program.
If only one unit is connected no address is needed.
Only MAC400&800
Power supply
*** Address=1
RS485
Interface
P+
P-
O+
*** Address=2
RS485
Interface
P+
P-
O+
To activate
the termination
set dip 9+10 in
position "ON"
*** Address=3
RS485
Interface
P+
Power
Max. 32VDC !
Supply
P-
Mains 230VAC
TT1144GB
ON
ON
101