7.1.
Connecting Input Signals
7.2.
Connecting Output Signals
Im por tant no tes about the fre quen cy out put:
The out put of the FT 9004 con sists of a col lec tor-emit ter path, which must be ex ter -
nal ly wi red ac cor ding ly.
The ex ter nal vol ta ge and the re sis tan ce must be cho sen so that the equip ment is
ope ra ted wit hin its spe ci fi ca tions.
The fol lo wing should be con si de red when di men sio ning the load re sis tor:
- The hig her should be the out put fre quen cy, the smal ler the va lue of the load re sis tor
must be cho sen. When an ex ter nal vol ta ge of 24 VDC, the va lue of the load re sis tor
800 should - be 1000 ohms to still ob tain a suf fi cient ly high sig nal edge at the ma xi -
mum out put fre quen cy of 25 kHz.
• the ma xi mum al lo wa ble cur rent for the col lec tor-emit ter path is 50 mA
• should the re be pro blems with the out put fre quen cy, it is re com men ded to con trol
the out put sig nal with an os cil los co pe and ad just the load re sis tor ac cor ding to the
spe ci fi ca tions.
(see tab le on next page)
ERMA-Electronic GmbH
10
7. Connections and Pin Assignment
7
8
9
GND
OUT
1
F
T
9
0
0
4
OUT
2
+3...30 VDC
1...2 kOhm
1
24 V - Input Voltage Level
2
GND
+24V
IN
P
U
T
C
H
A
N
N
E
L
S
Encoder
3
