Structure And Wiring Of 5Vdc Ultra High Speed Differential Input Circuit - FATEK FBS Series Manual

6.2 Structure and Wiring of 5VDC Ultra High Speed Differential Input Circuit

Only the MN main unit of FBs provides the 5VDC ultra high speed differential input circuit, which is mainly used for the
input of hardware high speed counter (HHSC) with a maximum working frequency up to 920 KHz. In practice, to ensure
the high speed and high noise immunity, please use Line-Driver for differential line driving. In environments with small
noise and medium working frequency (＜100KHz), however, it can be changed to the 5VDC single-end SINK or SRCE
input or to the 24VDC single-end SINK or SRCE input by connecting a 3KΩ/0.5W resistor in series, as shown in the
figure below.
(A)
Wiring of 5VDC differential input for Line-Driver driving（with frequency up to 920KHz for high speed and
environments with large noise）
(B) Wiring of 5VDC differential input to 5VDC single SINK or SRCE input (100KHz)
(C)
Method of converting 5VDC differential input to 24VDC single-end SRCE input (frequency＜100KHz)
R1:100Ω
R2:1.2KΩ
FB -PLC
S
FB PLC
S-
R1
R2
R1
R2
FB -PLC
S
R1
R2
R1
R2
External differential output
Twisted-pair
雙絞線
SINK input
SRCE input
SINK input
3K Ω /0.5W
3K /0.5W
Ω
SRCE input
H 6 - 2
A
(Encoder)
(編碼器)
B
NPN
Sensor
5V
DC
PNP
Sensor
NPN
Sensor
24
VDC
PNP
Sensor