PR electronics 2255 User manual

2255
f/I - f/f converter
No. 2255V102-UK
From ser. no. 980431001

1542
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2255V102-UK 1
f/I - f/f CONVERTER
TYPE 2255
CONTENTS
Warning....................................................................................................... 2
Symbol identification ............................................................................ 3
Safety instructions................................................................................. 3
How to dismantle system 2200....................................................... 5
General........................................................................................................ 6
Technical characteristics...................................................................... 6
Input............................................................................................................. 6
Auxiliary supplies ................................................................................... 6
Output(s).................................................................................................... 7
Status indication ..................................................................................... 7
Electrical specifications........................................................................ 8
Order ............................................................................................................ 11
Analogue output programming by way of jumpers.................. 11
Block diagram........................................................................................... 12
Programming / operating the function keys ............................... 13
Routing diagram: f/I converter with analogue and
digital output....................................................................................... 14
Setting of f/i converter with analogue and digital output.... 16
Routing diagram: f/f converter for pulse ...................................... 20
Setting of f/f converter to pulse division / multiplication..... 22
Routing diagram: Frequency generator......................................... 24
Setting of frequency generator........................................................ 26

2 2255V102-UK
WARNING
This device is designed for connection to hazardous electric
voltages. Ignoring this warning can result in severe personal injury
or mechanical damage.
To avoid the risk of electric shock and fire, the safety instructions
of this manual must be observed and the guidelines followed. The
electrical specifications must not be exceeded, and the device
must only be applied as described in the following.
Prior to the commissioning of the device, this manual must be
examined carefully.
Only qualified personnel (technicians) should install this device.
If the equipment is used in a manner not specified by the
manufacturer, the protection provided by the equipment may be
impaired.
WARNING
Until the device is fixed, do not connect hazardous voltages to the
device. The following operations should only be carried out on a
disconnected device and under ESD safe conditions:
Dismantlement of the device for setting of dipswitches
and jumpers.
General mounting, connection and disconnection of wires.
Troubleshooting the device.
Repair of the device and replacement of circuit breakers must
be done by PR electronics A/S only.
WARNING
To keep the safety distances, devices with two built-in relays must
not be connected to both hazardous and non-hazardous voltages
on the same device’s relay contacts.
SYSTEM 2200 must be mounted in socket type S3B Releco (order
no 7023).
HAZARDOUS
VOLTAGE
INSTAL-
LATION
GENERAL

2255V102-UK 3
SYMBOL IDENTIFICATION
Triangle with an exclamation mark: Warning / demand.
Potentially lethal situations.
The CE mark proves the compliance of the device with the requirements
of the directives.
The double insulation symbol shows that the device is protected by double
or reinforced insulation.
SAFETY INSTRUCTIONS
DEFINITIONS
Hazardous voltages have been defined as the ranges 75...1500 Volt DC, and
50...1000 Volt AC.
Technicians are qualified persons educated or trained to mount, operate, and also
troubleshoot technically correct and in accordance with safety regulations.
Operators, being familiar with the contents of this manual, adjust and operate the
knobs or potentiometers during normal operation.
RECEIPT AND UNPACKING
Unpack the device without damaging it. The packing should always follow the
device until this has been permanently mounted. Check at the receipt of the device
whether the type corresponds to the one ordered.
ENVIRONMENT
Avoid direct sunlight, dust, high temperatures, mechanical vibrations and shock, as
well as rain and heavy moisture. If necessary, heating in excess of the stated limits
for ambient temperatures should be avoided by way of ventilation. All devices fall
under Installation Category II, Pollution Degree 1, and Insulation Class II.
MOUNTING
Only technicians who are familiar with the technical terms, warnings, and
instructions in the manual and who are able to follow these should connect the
device.

4 2255V102-UK
Should there be any doubt as to the correct handling of the device, please contact
your local distributor or, alternatively
PR electronics A/S
www.prelectronics.com
Mounting and connection of the device should comply with national legislation for
mounting of electric materials, i.a. wire cross section, protective fuse, and location.
Descriptions of Input / Output and supply connections are shown in the block
diagram and side label.
The following apply to fixed hazardous voltages-connected devices:
The max. size of the protective fuse is 10 A and, together with a power
switch, it should be easily accessible and close to the device. The power
switch should be marked with a label telling it will switch off the voltage
to the device.
CALIBRATION AND ADJUSTMENT
During calibration and adjustment, the measuring and connection of external
voltages must be carried out according to the specifications of this manual.
The technician must use tools and instruments that are safe to use.
NORMAL OPERATION
Operators are only allowed to adjust and operate devices that are safely fixed in
panels, etc., thus avoiding the danger of personal injury and damage. This means
there is no electrical shock hazard, and the device is easily accessible.
CLEANING
When disconnected, the device may be cleaned with a cloth moistened with
distilled water.
LIABILITY
To the extent the instructions in this manual are not strictly observed, the custom-
er cannot advance a demand against PR electronics A/S that would otherwise exist
according to the concluded sales agreement.

2255V102-UK 5
HOW TO DISMANTLE SYSTEM 2200
The back panel of the device is detached from the housing by way of a screw-driver
as shown in picture 1
On a device 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 DIP-switches
and replacement of jumpers.

6 2255V102-UK
f/I - f/f CONVERTER 2255
• Programmable f/I converter
• Programmable decimal divider / decimal multiplier
• Programmable frequency generator
• Relay output as option
• Supply voltage 24 VDC
General
The 2255 f/I - f/f converter is configured to the requested 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.

2255V102-UK 7
S0 Supply:
15 VDC. Imax. 25 mA. Imin. (800 Ωload) 10 mA.
Special supply:
As option special voltage supplies within the range 5...15 VDC / 30 mA.
Output(s)
Standard current output (pin 3) programmable within the range 0...20 mA.
Min. span 5 mA. Max. span 20 mA.
Max. offset of 50% of the max. value.
Current limit: Max. 26 mA.
Standard voltage output (pin 2) is obtained by leading the current signal through
an internal shunt resistor.
With internal dipswitches a 50 Ωor a 500 Ωshunt resistor is selected, which
results in a voltage output of 0...250 mV and 0 / 0.2...1 V (50 Ω) and 0...2.5 V and
0 / 2...10 V (500 Ω).
With a special internal shunt resistor, units with other output voltages can be
delivered (max. 12 VDC).
Current and voltage signals are referring to the supply gnd. but if both signals are
used simultaneously, only the voltage signal has gnd. as reference.
NPN pulse output (option) for relay, electromechanical counter or equivalent load.
The output is current-limited to 130 mA with a PTC resistor.
The relay output (option) with change-over contact. 300 VA, max. 150 VRMS, 2 A.
Max. DC load at 24 VDC is 1 A.
Status indication
2255 is equipped with 3 status indicators in the front.
f in: Indicates active input (inactive by the NPN input).
Input frequencies > 50 Hz are shown by fixed light.
Dig. out: Indicates active output.
Error: Indicates sensor error by NAMUR input.

8 2255V102-UK
Electrical specifications
Specifications range............................................... -20°C to +60°C
Common specifications:
Supply voltage.......................................................... 19.2...28.8 VDC
Internal consumption ............................................. 2.4 W
Isolation, test / operation..................................... 1400 VAC / 150 VAC
Warm-up time............................................................ 1 min.
Signal / noise ratio .................................................. Min. 60 dB
Signal dynamics, output ....................................... 16 bit
Response time (programmable)......................... 60 ms to 999 s + period time
Calibration temperature ........................................ 20...28°C
Temperature coefficient........................................ < ±0.01% of span / °C
Linearity error ........................................................... ≤±0.1% of span
Effect of supply voltage change....................... < 0.005% of span / VDC
Auxiliary voltages:
NAMUR supply.......................................................... 8 VDC ±0.5 VDC / 8 mA
S0 supply .................................................................... 15 VDC / 25 mA
Special (acc. to order)............................................. 5...15 VDC / 30 mA
Immunity influence................................................. < ±0.5%
Air humidity................................................................ < 95% RH (non-cond.)
Dimensions (HxWxD).............................................. 80.5 x 35.5 x 84.5 mm
Protection degree.................................................... IP50
Weight .......................................................................... 125 g
Input:
General:
Measurement range................................................ 0...20 kHz
Min. measurement range...................................... 0.001 Hz
Low cut off................................................................. 0.001 Hz
Max. offset ................................................................. 90% of selec. max. value
Min. pulse width....................................................... 25 µs

2255V102-UK 9
NAMUR input:
Trig-level LOW........................................................... ≤1.2 mA
Trig-level HIGH.......................................................... ≥2.1 mA
Input impedance ...................................................... 1000 Ω
Sensor error detection:
Short-circuit ............................................................... ≥ 7.0 mA
Breakage ..................................................................... ≤ 0.2 mA
Response time.......................................................... ≤ 400 ms
Tacho input:
Trig-level LOW........................................................... ≤ 100 mV
Trig-level HIGH.......................................................... ≥200 mV
Input impedance ...................................................... ≥100 kΩ
Max. input voltage .................................................. 80 VAC pp
NPN / PNP input:
Trig-level LOW........................................................... ≤4.0 V
Trig-level HIGH.......................................................... ≥7.0 V
Input impedance ...................................................... Typ. 3.48 kΩ
TTL input:
Trig-level LOW........................................................... ≤1.2 VDC
Trig-level HIGH.......................................................... ≥1.7 VDC
Input impedance ...................................................... 100 kΩ
S0 input:
Trig-level LOW........................................................... ≤4.5 mA
Trig-level HIGH ........................................................ ≤6.2 mA
Analog output:
Current output:
Signal range............................................................... 0...20 mA
Min. signal range...................................................... 5 mA
Max. offset ................................................................. 50% of selec. max. value
Updating time ........................................................... 20 ms
Load (max.)................................................................. 20 mA / 600 Ω/ 12 VDC
Load stability............................................................. < ±0.01% of span/100 Ω

10 2255V102-UK
Voltage output through internal shunt:
Signal range............................................................... 0...10 VDC
Min. signal range...................................................... 250 mV
Max. offset ................................................................. 50% of selec. max. value
Load (min.).................................................................. 500 kΩ
NPN output:
Max. current............................................................... 130 mA
Max. voltage .............................................................. 28 VDC
f/f converter output:
Signal range............................................................... 0...1000 Hz
Min. pulse width....................................................... 500 µs
Max. pulse width...................................................... 999 ms
Max. duty cycle......................................................... 50%
Frequency generator:
Pulse width
f < 50 Hz..................................................................... Min. 10 ms, max. 999 s
f ≥50 Hz ..................................................................... 50% duty cycle
Relay output:
Max. frequency ........................................................ 20 Hz
Max. voltage .............................................................. 150 VRMS
Max. AC current ........................................................ 2 A
Max. AC power .......................................................... 300 VA
Max. load at 24 VDC............................................... 1 A
Observed authority requirements: Standard:
EMC 2004/108/EC .................................................. EN 61326-1
LVD 2006/95/EC...................................................... EN 61010-1
EAC TR-CU 020/2011............................................ EN 61326-1
Of span = Of the presently selected range

2255V102-UK 11
Analogue output programming by way of jumpers
Order
Output range JP3 JP2 JP1
0...10 mA (current only)
0...20 mA (current only)
0...10 mA / 0...0.5 V
0...20 mA / 0...1.0 V
0...10 mA / 0...5.0 V
0...20 mA / 0...10.0 V
OFF
ON
OFF
ON
OFF
ON
-
-
OFF
OFF
ON
ON
-
-
ON
ON
OFF
OFF
Special voltage output:
(Resistor R38 mounted)
ON or
OFF OFF OFF
Type Version Output
2255 Programmable : B Analogue + NPN output : 1
Analogue + relay output : 2

12 2255V102-UK
BLOCK DIAGRAM
D/A
0...20
mA
JP 3 Off 0...10 mA
9
10
CPU
EEPROM
1
V
3I +
A
V +
DC
DC
V
A
2255
500
50
2V +
JP 2JP 1
8
11
4
Namur
NPNPNP
Vreg.
7
5
6
f In
S0
Supply + 24VDC Supply gnd.
I + V
Out
I
Out
V
Out
Analogue switch
8 / 15 VDC
Spec.
V Out
R 38
Onlyversion: B
Relay common Relay N.C. Relay N.O. / NPN
Only
Output : 2
Input +
Sup.
+
Sup.
+
Tacho
Input gnd.
8 / 15 VDC
Error
f Out
Gnd.

2255V102-UK 13
PROGRAMMING / OPERATING THE FUNCTION KEYS
DOCUMENTATION FOR ROUTING DIAGRAM
GENERAL:
The programming is menu-controlled. The main menus are numbered in
level 0 (x.0), and the submenus are numbered in level 1 (x.1 to x.5). Each
submenu has an accompanying entry menu. The menus are structured in
such a way that the menus most frequently used are closer to the default
menu 0.0. Please note that programming is only possible when submenu
5.4 PAS has the value 040.
Submenus and branches are selected
by the 3 function keys 3, 1and 2 as
outlined in the routing diagram.
Activating 2in the branches will
display the current value of the entry
and parameter selection menus.
In entry menus, the digit that can be
changed will flash.
Active digit position is shifted by the
3key, and the value is changed by
the 1key.
When the decimal point flashes, its
position can be changed by the 1key.
In parameter selection menus you
switch between the parameters by the
1 key.
Save by first activating 3and then 1
simultaneously.
Leave the entry menu without saving,
activate 2.
5.15.0
Memory
Programming
Press and hold , then press
to store changes
Change of figure / parameter
Next digit or point
Go to entry menu / Leave
menu without changes

14 2255V102-UK
Power On
0.0 2.0 2.1 2.2 2.3
kHz Hz mHz
5.0 5.1 5.2 5.3 5.4 5.5
LO = < 50 Hz HI = > 50 Hz
4.0 4.1 4.2 4.3 4.4 4.5 3.0 3.1 3.2 3.3 3.4
5.15.0
1.0 1.1 1.2 1.3
kHz Hz mHz
f / I converter with analogue and digital output [Function no. 001] Routing diagram
At power ON, or if no keys have been activated for a period of 2 minutes, the display returns to main menu 0.0
0% Input
100% Input
Application selec. Function
001 = f/I converter 002 = f/f converter 003 = Pulse generator
Sensor type
PnP - open collector nPn - open collector ttL - standard TTL nUr - NAMUR SO - DIN 43864 tAC - AC Tacho
Input filter
0...999 seconds
0...999
040 = access
accepted
- - - = access
blocked
Password selection
Power-up
delay
setting
Digital output
No function /
100% window Hysteresis Action Function
InC = increasing
dEC = decreasing
UOn = window On
UOF = window Off
L = limit LC = limit & cable C = cable
100%
output
Current /
voltage
Analogue output Response time
0,06...999 seconds
0...20 mA
0...10 VDC
001 = 0...10 mA 002 = 0...20 mA 003 = 0...500 mV 004 = 0...1 VDC 005 = 0...5 VDC 006 = 0...10 VDC
for
Memory
Programming
Press and hold , then press to store changes
Change of figure / parameter Next digit or point Go to entry menu / Leave menu without changes
0...999 Hz 0...999 mHz 0...999 Hz 0...999 mHz
0...99,9% 0...99,9%
Setpoint /
0% window
0...20 mA
0...10 VDC
0%
output
0...20 kHz 0...20 kHz
0...99,9%
Main menu 0.0

2255V102-UK 15
Power On
0.0 2.0 2.1 2.2 2.3
kHz Hz mHz
5.0 5.1 5.2 5.3 5.4 5.5
LO = < 50 Hz HI = > 50 Hz
4.0 4.1 4.2 4.3 4.4 4.5 3.0 3.1 3.2 3.3 3.4
5.15.0
1.0 1.1 1.2 1.3
kHz Hz mHz
f / I converter with analogue and digital output [Function no. 001] Routing diagram
At power ON, or if no keys have been activated for a period of 2 minutes, the display returns to main menu 0.0
0% Input
100% Input
Application selec. Function
001 = f/I converter 002 = f/f converter 003 = Pulse generator
Sensor type
PnP - open collector nPn - open collector ttL - standard TTL nUr - NAMUR SO - DIN 43864 tAC - AC Tacho
Input filter
0...999 seconds
0...999
040 = access
accepted
- - - = access
blocked
Password selection
Power-up
delay
setting
Digital output
No function /
100% window Hysteresis Action Function
InC = increasing
dEC = decreasing
UOn = window On
UOF = window Off
L = limit LC = limit & cable C = cable
100%
output
Current /
voltage
Analogue output Response time
0,06...999 seconds
0...20 mA
0...10 VDC
001 = 0...10 mA 002 = 0...20 mA 003 = 0...500 mV 004 = 0...1 VDC 005 = 0...5 VDC 006 = 0...10 VDC
for
Memory
Programming
Press and hold , then press to store changes
Change of figure / parameter Next digit or point Go to entry menu / Leave menu without changes
0...999 Hz 0...999 mHz 0...999 Hz 0...999 mHz
0...99,9% 0...99,9%
Setpoint /
0% window
0...20 mA
0...10 VDC
0%
output
0...20 kHz 0...20 kHz
0...99,9%
Main menu 0.0

16 2255V102-UK
SETTING OF f/I CONVERTER WITH ANALOGUE AND
DIGITAL OUTPUT
The following describes the routing diagram menu points from 0.0 to 5.5 for
setting the f/I converter with analogue and digital output.
EXAMPLE:
Frequency span.................................0...12550.5 Hz
Analogue output...............................4...20 mA
Response time...................................2.5 s
Alarm frequencies ............................< 1000 Hz, > 11000 Hz (alarm window)
Hysteresis............................................20 Hz
Digital output action .......................Active within the alarm window
Digital output function...................Trip amplifier and sensor fault alarm
Sensor....................................................NAMUR
Input filter............................................Pulse width > 0.02 ms
Digital output power up delay.....10.0 s
First, the function f/I converter must be chosen in submenu 5.1.
0.0 DEFAULT - The input frequency is displayed in % of the input span.
At power ON, or if no keys have been activated for a period of 2 minutes,
the display returns to default. When the display is in default, menu 0.0
activating the key 1will indicate the present function, i.a. F01.
1.0 InL - Setting of 0% frequency.
1.1 L-.- 0% setting of frequency in kHz.
Entering of example = 000.
Valid selections are 0...20.0 kHz.
1.2 -L.- 0% setting of frequency in Hz.
Entering of example = 000.
Valid selections are 0...999 Hz.
1.3 —.L 0% setting of frequency in mHz.
Entering of example = 000.
Valid selections are 0...999 mHz.

2255V102-UK 17
2.0 InH - Setting of 100% frequency.
2.1 H-.- 100% setting of frequency in kHz.
Entering of example = 012.
Valid selections are 0...20.0 kHz.
2.2 -H.- 100% setting of frequency in Hz.
Entering of example = 550.
Valid selections are 0...999 Hz.
2.3 —.H 100% setting of frequency in mHz.
Entering of example = 500.
Valid selections are 0...999 mHz.
3.0 AOU - Setting of analogue output.
3.1 ALO - 0% setting of analogue output
Entering of example = 04.0.
Valid selections are current 0.0...20.0 mA or voltage 0.0...10 VDC.
3.2 AHI - 100% setting of analogue output
Entering of example = 20.0.
Valid selections are current 0.0...20.0 mA or voltage 0.0...10 VDC.
3.3 UI - Current or voltage output setting
NB: Please see jumper positioning in “Programming of analogue output”.
Entering of example = 002.
Possible selections are:
001 = current output 0...10 mA
002 = current output 0...20 mA (i.a. 4...20mA)
003 = voltage output 0...500 mV
004 = voltage output 0...1 V (i.a. 0.2...1 V)
005 = voltage output 0...5 V
006 = voltage output 0...10 V
3.4 rEP - Response time setting
If the selected response time < 0.06 s, the response time will be 0.06
seconds plus the input frequency response time. The response time
will also act on the digital output so that the output will not activate /
deactivate because of short-lived changes in the input frequency.
Entering of example = 02.5.
Valid selections are 0.06...999 seconds.

18 2255V102-UK
4.0 dOU - Digital setting of output
4.1 dLO - Setting of setpoint / limit frequency in % of the
frequency span.
This value corresponds to the setpoint, when menu 4.4 dOA = { InC or
dEC }, and it corresponds to the low limit frequency of a setpoint window
when menu 4.4 dOA = { UOn or UOF }.
Entering of example = 7.97 (1000 / 12550.5 * 100 [%]).
Valid selections are 0.0...99.9%.
4.2 dHI - setting of limit frequency in % of the frequency span.
This value corresponds to the high limit frequency of a setpoint window
and is only valid when menu 4.4 dOA = { UOn or UOF }.
Entering of example = 87.6 (11000 / 12550.5 * 100 [%]).
Valid selections are 0.0...99.9%.
4.3 HYS - Setting of hysteresis in % of the frequency span.
If 4.4 dOA = { UOn or UOF } the hysteresis is outside the window
(4.1 and 4.2)
If 4.4 dOA = { InC } the hysteresis is below setpoint (4.1).
If 4.4 dOA = { dEC } the hysteresis is above setpoint (4.1).
Entering of example = 0.16 (20 / 12550.5 * 100 [%]).
Valid selections are 0.0...99.9%.
4.4 dOA - Digital output action setting.
For InC or dEC the digital output action will respectively be increasing
or decreasing. The setpoint and the hysteresis must be set in menu 4.1
and 4.3.
For UOn the digital output is activated within the window.
For UOF the digital output is activated outside the window.
The low and the high limit frequency in the window are set in menu 4.1
and 4.2 respectively, and the hysteresis is set in menu 4.3.
Entering of example = UOn.
Possible selections are InC, dEC, UOn or UOF.
4.5 dOF - Digital output function setting.
If L (Limit) is selected, the digital output will work as a trip amplifier.
If LC (Limit, Cable) is selected, the digital output will act as both a trip
amplifier and as a sensor error monitor. If C (Cable) is selected, the digital
output will act as a sensor error monitor.
Sensor error monitoring is performed only by NAMUR sensor when
submenu 5.2 InP = nUr
Entering of example = LC.
Possible selections are L, LC or C.