Design Rules; Ground; Communication Interfaces; I/Os - maxon motor EPOS2 Module 36/2 Hardware Reference Manual

5.2

Design Rules

Follow below rules to design your application-specific motherboard and to provide correct and save
function of the EPOS2 Module 36/2.
Before continuing, make sure to consult the following sections:
5.2.1
The ground pins (GND) are internally connected, but each ground pin is assigned to a functional block.
It is common practice to place a ground plane on the motherboard and will be required to connect pins
A1, A6, B1 and B11 with thick tracks to the power supply voltage ground.The ground pins of each func-
tional block are as follows:
Use Pin(s)...
A1/6
B1/11
A11
A18
A21
B12/17
A29
A32
B24
Table 5-24
If ground safety earth is available, connect the ground plane over some parallel capacitors to the ground
safety earth. We recommend the use of capacitors with 47 nF and 100 V.
5.2.2
5.2.3
maxon motor control
EPOS2 Positioning Controller
EPOS2 Module 36/2 Hardware Reference
• For Pin Description chapter "4.1 Pin Assignment" on page 4-17.
• For Performance Data chapter "3 Technical Data" on page 3-11 and chapter "4.3.3 Low
Supply Voltage Operation (optional)" on page 4-21.
• For Dimensional Drawings chapter "3.3 Dimensional Drawings" on page 3-13.

Ground

...to connect this Functional Block to Ground:
Power supply voltage
Encoder
Analog inputs
Digital inputs and outputs
USB and RS232
CAN bus
CAN ID settings
Functional Blocks – Ground Connections

Communication Interfaces

• For RS232 chapter "4.10 RS232 Connection" on page 4-32.
• For CAN chapter "4.12 CAN Connection" on page 4-33.

I/Os

• For Digital inputs chapter "4.7 Digital Input Connection" on page 4-25.
• For Analog Inputs chapter "4.8 Analog Input Connection" on page 4-28.
• For Digital Outputs chapter "4.9 Digital Output Connection" on page 4-29.
© 2017 maxon motor. Subject to change without prior notice.
Document ID: rel7050
Edition: May 2017
5-41