PR electronics 2255, User Manual, Page: 20 / 63

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f/I - f/f CONVERTER 2255
•. Programmable.f/I.converter
•. Programmable.decimal.divider./.decimal.multiplier
•. Programmable.frequency.generator
•. Relay.output.as.option
•. Fixed.programming.as.option
•. Supply.voltage.24.VDC
GENERaL:
In. the. programmable. version,. the. 2255. f/I. -. f/f. converter. is. configured. to. the.
reque.sted.function.by.means.of.a.menu-driven.dialogue.with.keys.and.display.
in.the.front..Typical.signalling.device.may.be.pulse.generators.e.g..flow.meters,.
tacho-generators.or.inductive.sensors.
The f/I function.is.used.for.frequency.to.current./.voltage.conversion.within.the.
frequency.range.from.0.001.Hz.to.20.kHz.and.for.speed.control.with.the.digital.
output.as.frequency.watch.
The f/f function is.used.for.division.or.multiplication.of.pulses.and.as.a.buffer.
for.fast.pulse.trains.
Max..input.frequency.20.kHz.
Max..output.frequency.1.kHz.
The frequency generator. function. is. for. instance. used. as. a. time. base. or. a.
clock.generator..Max..output.frequency.20.kHz..The.2255.can.be.delivered.pre-
configured.according.to.specifications.
TECHNICaL CHaRaCTERISTICS:
INPuT:
Programmable.input.for.connexion.of.standard.pulse.generator..Input.filter.may.
be.selected.for.pulse.width.>.0.02.ms/max..20.kHz,.or.>.10.ms/max..50.Hz..By.
contact.input,.the.filter.for.10.ms/50.Hz.should.be.used.
auxILIaRY SuPPLIES:
(selected.by.input.configuration)
NaMuR supply:
8.VDC.±0.5.V./.8.mA.for.supply.of.NAMUR.sensors.
HOW TO DISMaNTLE SYSTEM 2200
The.back.panel.of.the.module.is.detached.from.the.housing.by.way.of.a.screw-
driver.as.shown.in.picture.1
On.a.module.with.knobs,.these.must.be.removed.before.the.PCB.can.be.taken.
out.as.shown.in.picture.2.
After.this,.the.back.panel.can.be.pulled.out.together.with.the.PCB,.but.please.
notice.the.position.of.the.PCB.as.there.is.a.number.of.different.positions.in.the.
house..Do.not.pull.the.wires.unnecessarily,.instead.pull.the.PCB,.see.picture.3.
Switches.and.jumpers.can.now.be.moved..When.assembling.the.back.plate.and.
housing,.please.make.sure.no.wires.are.stuck.
Picture. 1:. Dismantlement. of. back. plate.
and.housing.
Picture.2:.Removal.of.knobs.
Picture.3:.Removal.of.PCBs.ftor.adjustment.of.dipswitches.
and.replacement.of.jumpers.