5 lvds termination, 6 rbias resistor, 7 reset logic – BECKHOFF ET1200 User Manual

Page 58: Lvds termination, Rbias resistor, Reset logic, Figure 29: lvds termination, Figure 30: rbias resistor, Figure 31: reset logic, Logic core

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Example Schematics

III-48

Slave Controller

– ET1200 Hardware Description

9.5

LVDS termination

The LVDS termination with

an impedance of 100 Ω is typically achieved by a resistor R

L

=100 Ω. It is

only necessary for EBUS ports and should be placed adjacent to the EBUS_RX inputs.

EBUS_RX-

EBUS_RX+

R

L

=

1

0

0

R

ET1200

R

L

I+

R

L

I-

V

CC I/O

Figure 29: LVDS termination

9.6

RBIAS resistor

The LVDS RBIAS resistor should have a value of R

BIAS

=

11 kΩ.

1

1

K

RBIAS

ET1200

Figure 30: RBIAS resistor

9.7

Reset Logic

Logic

Core

RESET

W

P

U

ET1200

V

CC I/O

Reset Other

Reset ET1200

Reset

Controller

Reset

ECAT Reset
Reg. 0x0040

Reset In

Reset Out

Optional

Optional

Power

Supervisor

V

CC I/O

V

CC Core

GND

I/O

R

V

CC I/O

Figure 31: Reset Logic

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