JVL MAC050 User Manual page 149

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.
JVL A/S - User Manual - Integrated Servo Motors MAC050 - 4500
RS485 network with 2 x MAC140 and 1 x MAC800
mounted with MAC00-B1, B2 or B4 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
A
B
GND
Control voltage
Only MAC50-141
with B2 or B4
MAC50-141
A
B
GND
Control voltage
Only MAC50-141 with
B2 or B4 (Optional)
MAC800
A
B
GND
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 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.
Power supply
Motor
*** Address=1
RS485
Interface
P+
Power
Supply
P-
O+
Motor
*** Address=2
RS485
Interface
P+
Power
Supply
P-
O+
Motor
*** Address=3
**
RS485
Interface
P+
Power
Max. 32VDC !
Supply
P-
Mains 230VAC
Main supply
TT1049GB
145