Electrical Connections; Mounting Of Moisture Detector And Adapter; Mounting Of Detector-Controller - Bühler technologies FF Serie Manual De Instrucciones

FF-xx
DANGER
Potentially explosive atmosphere
Explosion hazard when used in explosive areas
The equipment is not suitable for use in explosive areas.
Never operate moisture detectors located in flammable or ex-
plosive gas mixtures on the device.
3 Transport and storage
The device should be only transported in the original case or
in appropriate packing.
If the device is not used for some time, protect it against heat
and humidity. Store the device in a roofed, dry, and dust free
room. Temperature should be between –20 °C and 40 °C (-4 °F
and 104 °F).
4 Installation and connection
4.1 Mounting

4.1.1 Mounting of moisture detector and adapter

The flow adapter is equipped with internal threading, G1/4 or
NPT1/4 (flow adaptor marked with NPT), for the gas connec-
tions and G1/4 for the moisture sensor. The drawing you find
on the backside of the attached data sheet. As well the fittings
as the moisture detector must be used with Teflon sealing or
an O-ring to assure proper sealing of the sample stream.
Please assure that the wires are guided tension free.
If there's particulate or aerosols in the sample gas, a filter has
to be installed upstream the detector. Otherwise the particu-
late or aerosols can build a layer on the detectors surface in-
hibiting its function.
The wire should NOT be put into one cable channel with
power switching cords. The function can be influenced other-
wise.
It might be necessary to adjust the position of the humidity
sensor in strongly fluctuating ambient or component temper-
atures in order to ensure the necessary tightness in the sys-
tem.

4.1.2 Mounting of detector-controller

Controller type FF-19
This type is designed as an insert for 19"-housings. The bus
connector is a DIN 41612 type B. Used pins of columns a and c
are plated through.
Before inserting the FF-19 into the housing, set the jumpers.
Controller types FF-HM
The type FF-HM is designed for standard 35 mm rail mounting
according to DIN EN 50022.
Controller types type FF-..-U
For mounting disassemble the cover by loosening the 4 black
screws. The holes for the mounting screws are below the black
screws. Mounting dimensions are 165 mm x 79 mm (6.5" x
3.1"). They are made for screws M4, the screws head should be
at least 6 mm (0.24") in diameter.
BX410002 ◦ 09/2017

4.2 Electrical connections

WARNING
Hazardous electrical voltage
The device must be installed by trained staff only.
CAUTION
Wrong mains voltage
Wrong mains voltage may damage the device.
Regard the correct mains voltage as given on the type plate.
WARNING
High voltage
Damage to the device in case of insulation testing
Do not proceed insulation tests with high voltage to the
device as a whole!
Insulation test
The device is equipped with extensive EMC protection. If insu-
lation tests are carried out the electronic filter devices will be
damaged. All necessary tests have been carried out for all con-
cerned groups of components at the factory (test voltage 1 kV
or 1.5 kV respectively, depending on the device).
Moisture and broken-wire alarms are signaled via two inde-
pendent dry contacts.
They are made fail-safe in the FF-HM and FF-19 types: The re-
lays switch when power is turned on and no moisture is de-
tected, they fall off when power fails, moisture or a broken
wire is detected. Relays are used in the opposite logic with the
types FF-..-U (switched in the alarm case).
The devices have three LEDs (FF-3-U-2: five LEDs) for POWER,
BROKEN WIRE and MOISTURE.
Alarms are monostable; they switch back after the cause for
the alarm is removed.
Using the FF-HM or FF-19 type a hold function can be chosen
by setting/wiring a jumper. The alarm will stay until the in-
ternal or externally connected reset button is pressed.
4.2.1 Controller type FF-19
Note the drawing 47/075-06-4.
This type can only be used with a 24 V DC power supply. NO-
TICE! The grounding to PE has always to be attached!
The detector FF-40 is connected to PIN 30 and 31, the shield to
PIN 2.
Connect the cable to the FF-3-N. Root strands white and brown
to PIN 30 and 31, and shielding to PIN 2.
For FF-3-N and FF-40 the jumper J2 is set to 2-3.
When using older models (FF-1) jumper J2 has to be set to 1-2.
Otherwise the controller would signal a broken wire.
Alarm hold function:
To select this function, jumper J1 has to be set to 2-3. An ex-
ternal reset switch or contact can be connected to PIN 26 and
27 of the bus connector.
Bühler Technologies GmbH 11