5.
Function
The con ver ter
FT 9004
is a fre quen cy di vi der in a snap-in hou sing for 35mm rail
moun ting. The unit is de sig ned for di vi ding pul se chains of in cre men tal en co ders by a
pre de ter min ed va lue. The de si red di vi der va lue is ad jus tab le by the user. The unit
can be used for in put fre quen cies up to 90 kHz. Up-down coun ting is pos si ble wit hout
loss of pul ses.
The re are two ope ra ting mo des avai la ble. One mode is able to di vi de two in put pul se
chains 90° out of pha se ap plied to the in put chan nels "In put A" and "In put B". A se -
cond ope ra ting mode uses only in put chan nel "In put A" for the in put pul se chain. The
ot her in put chan nel "In put B" de ci des when using this mode the di rec ti on of the out put
pul se chains.
The re are two open col lec tor out put chan nels "Out 1" and "Out 2". At both ope ra ting
mo des the out put chan nels "Out 1" and "Out 2" are ge ner ating ou put pul se chains 90°
out of pha se, di vi ded by the ad jus ted di vi der va lue.
The in put chan nels are iso la ted. Sour ce sig nals of at least 5 mA are nee ded to dri ve
the in put chan nels. The in put vol ta ge le vel can be set by the user by in ter nal jum pers
to in put le vels of 5 V, 12V and 24 V.
The out put chan nels are iso la ted from the in put chan nels and the po wer supp ly in put.
The out put chan nels are pro vi ded as open col lec tor out puts. So the user can crea -
te by re sis tan ces out put vol ta ges from 3 V to 30 V ac cor ding to his re qui re ments.
6.
Jumper- and DIP-Switch Configurations
For ad just ments the re are three jum per blocks and two 8-pole DIP swit ches in si de of
the case. To ac cess the jum per blocks and the DIP swit ches the case has to be ope -
ned. This is simp le done with the aid of a small screwdri ver. The re are two litt le flat on
each side of the case which must be pres sed in wards. The top of the case can now be
se pa ra ted from the base and the PCB can be pul led out (pic.2).
7
ERMA-Electronic GmbH
5. Function
Pic tu re 2
