NIVELCO PKK-312 Current Control Switch User Manual
- June 13, 2024
- NIVELCO
Table of Contents
NIVELCO PKK-312 Current Control Switch
Thank you for choosing a NIVELCO product!
APPLICATION
The UNICONT PKK–312– series comprises 4…20 mA current controlled limit switches. The relay output of the units switches at the current limit values (taught to the unit), depending on the limits, switching difference, or window comparison modes. Error status indication can be programmed so that the relay gets energized or de-energized when detecting a failure. Failure may be a discontinuity in the cable / lower-value fault current or short circuit / upper-value error current. The unit is suitable for powering all NIVELCO- manufactured 2-wire (4…20 mA) transmitters. Some models of this series meet the requirements of intrinsically safe operation. The UNICONT PKK–312–8 Ex can monitor the DC-powered, 2-wire NIVOSWITCH Ex-type vibrating fork’s output current changes between freely vibrating and immersed states without any further programming.
TECHNICAL DATA
GENERAL
| Type | PKK–312– o |
|---|---|
| Nominal input current range | 1…22 mA |
| Accuracy of switching level / Threshold level | ±0.1 mA |
| Discontinuity threshold / Lower value fault current | 3.7 mA |
| Short circuit threshold / Upper-value fault current | 22 mA |
| Input impedance | 10 Ω |
| Input overload capability | Max. 100 mA (continuous) |
| Switching delay | 0.1 s; 1 s; 2 s; 5 s selectable |
| Relay | – Output |
| – Rating | 250 V AC, 8 A, AC1 |
| – Insulation strength | 4000 V 50 Hz |
| – Electrical / Mechanical life expectancy | 105 / 2 x 106 switching |
| Electrical connection | Max. 2.5 mm2 (AWG14) twisted, or max 4 mm2 (AWG12) |
solid wire
Mechanical connection| EN 60715-35 rail
Ingress protection| IP20
Weight| ~210 g (~0.5 lb)
SPECIAL DATA
| Ex version | Standard version | |
|---|---|---|
| Type | PKK–312–5Ex | PKK–312–6Ex |
| PKK–312–8Ex | PKK–312–1 | PKK–312–2 |
PKK–312–4
Power supply range| 230 V AC ±10%
50…60 Hz
| 110 V AC ±10%
50…60 Hz
| 24 V AC ±10%, 50…60 Hz,
24 V DC ±15%
| 230 V AC ±10%
50…60 Hz
| 110 V AC ±10%
50…60 Hz
| 24 V AC ±10%
50…60 Hz
| 24 V AC ±10%, 50…60 Hz,
24 V DC ±15%
Power consumption| < 2.5 VA| < 2.5 VA or < 2.5 W| < 2.7 VA| < 2.5 W
Safety maximum voltage| Um = 253 V AC| –
Switching levels| 2 values in the range of 1…22 mA| 10.5 mA; 12.5 mA| 2 values
in the range of 1…22 mA
Ex marking| II (1) G [Ex ia Ga] IIB
II (1) D[Ex ia Da] IIIC
| II (1) G [Ex ia Ga] IIC
II (1) D[Ex ia Da] IIIC
| –
Intrinsic safety data| U0 = 28.4 V; I0 = 140 mA; P0 = 1 W; L0 = 6 mH; C0 = 50
nF| U0 = 28.4 V; I0 = 80 mA; P0 = 0.6 W L0 = 4 mH; C0 = 50 nF| –
Output load capability| IT = 22 mA when UOUT ≈ 12 V| IT = 22 mA when UOUT ≈ 15
V| –| U0 = 30 V
IMAX = 70 mA UOUT min = 16 V
| U0 = 24 V
IMAX = 80 mA UOUT min = 23 V
Electrical protection| Class II| Class III| Class II| Class III
Reference document number| pkk3121m060bh_06| –
Ambient temperature| −25…+55 °C (−13…+131 °F)
ACCESSORIES
- User’s Manual
- Warranty Card
- EU Declaration of Conformity
DIMENSIONS
ORDER CODE
- Order codes of Ex versions end in ’Ex’
- For DC-powered, 2-wire NIVOSWITCH Ex vibrating fork of NIVELCO
INSTALLATION
- UNICONT PKK–312– must be mounted on an EN 60715-35 rail.
ATTENTION!
- Before installing the device, make sure that the input current values can be provided by the loop of the application. If not, teach the current values to the device before installing it. (See chapter 5 “Commissioning, Setting, Programming”)
WIRING
EX MODELS
STANDARD MODELS
COMMISSIONING, SETTING, PROGRAMMING
3 seconds after powering up, the unit begins to work with the signals as per the table of WORKING STATUS.
Working status|
---|---
LED| Status| Interpretation|
(SELECT)| GREEN| Relay energized R = 1|
RED| Relay de-energized R = 0|
SIMULTANEOUS RED BLINKING
OF BOTH LED
| Memory failure, Relay state sustained|
FAIL (STEP)
GREEN| No cable fault/No fault current.
No cable monitoring
|
RED| Cable fault, or. fault current|
The relay states relating to the operating modes and the input current are shown in the first diagram. Operation with delayed switching is demonstrated in the second diagram below.
CAUTION!
- If the input current is between the trigger points in hysteresis comparison mode when the unit is switched on, the relay will always be de-energized (R = 1 or R = 0) regardless of the operating mode.
- Depending on the actual task, the unit may need programming, which involves setting the operating mode (except PKK–312–8Ex type) and re-learning the switching points.
- The PKK–312–8Ex device without any additional programming is also suitable for the attenuated and unattenuated monitoring of the 2-wire DC-powered NIVOSWITCH Ex vibrating fork and for the monitoring of the current consumption associated with its unattenuated state and, based on this, influence the state of the relay output.
- For this type, the trigger points current values of 10.5 and 12.5 mA and switching differential operating mode cannot be changed.
Settings:
| Relay operating mode | (Default: R = 1) |
|---|---|
| Cable discontinuity monitoring | (Default: NONE) |
| Cable short circuit monitoring | (Default: NONE) |
| Damping | (Default: 0.1 s) |
| Revert to default |
A PKK–312–1 … PKK–312–7Ex Settings:
| Teaching current value | (Default: 10.5 mA and 12.5 mA) |
|---|---|
| Relay operating mode | (Default: R = 1) |
| Selecting comparison type | (Default: Switching difference) |
| Cable discontinuity monitoring | (Default: NONE) |
| Cable short circuit monitoring | (Default: NONE) |
| Damping | (Default: 0.1 s) |
| Revert to default |
PROGRAMMING
- Programming involves setting the operating mode and learning the input current values.
- Programming / reading the operating mode
- To initiate programming mode, press and hold the A button for about 5 seconds till the LED ‘PROGRAM’ lights up. To access the adjusting columns (as per the table below), press the A button briefly while in programming mode, and the steps will be indicated by the relevant LED ‘STEP’.
- The rows of the columns can be selected by pressing the B button, and the ‘SELECT’ LED will indicate the choice. After performing the necessary adjustments, exit programming mode by pressing and holding the A button for about 5 seconds until the LED ‘PROGRAM’ goes off.
PROGRAMMING / READING THE OPERATING MODE
Enter programming mode: press key A (for about 5 s) till the LED PROGRAM lights up
Adjustment columns with corresponding LED STEP states, accessed by short pressing of key A| ****
Adjustment row with relevant state of the LED SELECT , selected by short pressing of key B
GREEN| GREEN BLINKING| RED| RED BLINKING|
OFF
Relay operation mode| Comparison operation mode| Cable short
circuit / monitoring lower current| Cable discontinuity / monitoring
upper current| Switching delay
R = 1| Limit value 1.| ON, relay should be activated| ON, relay should be
activated| 0.1 s| GREEN
R = 0| Limit value 2.| ON, relay should be released| ON, relay should be
released| 1 s| GREEN BLINKING
—| Hysteresis| NO| NO| 2 s| RED
—| Window| —| —| 5 s| RED BLINKING
Quit programming mode: press key A (for about 5 s) till the LED
PROGRAM goes off.
- Cable monitoring can only be applied with Ex ex-certified 2-wire units
AUTO-QUIT PROGRAMMING MODE
- The unit will operate during programming by the previous parameters. The new, modified parameters will only take effect after quitting programming mode.
- If the transmitter is left in programming mode, it will automatically quit programming mode after 30 seconds, and the modified values will not take effect.
RELAY TEST
- The proper operation of the relay can be tested by pressing the B button for about 5 seconds. The state of the relay and the color of the LED will change (e.g., from green to red). Releasing the key makes the relay and the LED revert to their previous state.
REVERT TO DEFAULT
- The device reverts to the factory default programming values if buttons A and B are pressed together before/during power-up.
- TEACHING CURRENT VALUE OF TRIGGER POINT Teaching input currents involves saving the Iin current values for switching points 1 and 2 between the terminals (figure on the right) at the moment of the teaching.
- The circuits on the application site can produce the necessary current values.
- If the circuit of the actual application produces the input current, the actual current values do not have to be known.
- To teach the current values, press buttons A and B simultaneously for about 5 seconds until the device enters teaching mode, indicated by the blinking of the LED ‘PROGRAM’.
- Release one of the buttons (A or B) and the momentary current value will be assigned to switching points 1 or 2.
- Release the other button and the teaching process is completed, indicated by the going off of LED ‘PROGRAM’.
- You can teach the other limit value without exiting programming mode if you do not release the other button and press the one that was released for 5 seconds, then release the button you kept pressing while teaching the first value.
Teaching
| Status of
key A
| Status of
key B
| STEP
LED
| PROGRAM
LED
| SELECT
LED
Entering
teaching mode
| KEEP PRESSED > 5 s| OFF|
blinking
| OFF
Teaching current value for point 1|
KEEP PRESSED
|
RELEASE
|
OFF
| GREEN if SUCCESSFUL
RED blinking if FAILED
Quitting teaching mode|
RELEASE
|
–
| According to WORKING STATUS|
OFF
| According to WORKING STATUS
Entering
teaching mode
| KEEP PRESSED > 5 s| OFF|
blinking
| OFF
Teaching current value for point 2|
RELEASE
|
KEEP PRESSED
| GREEN if SUCCESSFUL
RED blinking if FAILED
|
OFF
Quitting teaching mode|
–
|
RELEASE
| According to
WORKING STATUS
|
OFF
| According to WORKING STATUS
MAINTENANCE AND REPAIR
- The device does not require regular maintenance. The warranty card contains the terms and conditions. Before returning the device for repairs, it must be cleaned thoroughly.
- The parts in contact with the medium may contain harmful substances; therefore, they must be decontaminated. Our official form (Returned Equipment Handling Form) must be filled and enclosed in the parcel. Download it from our website www.nivelco.com.
- The device must be sent back with a declaration of decontamination. A statement must be provided in the declaration that the decontamination process was successfully completed and that the device is clean of any hazardous substances.
STORAGE CONDITIONS
- Ambient temperature: −30…+60 °C (−22…+140 °F)
- Relative humidity: max. 98%.
- pkk312en21h06
- October 2021
- NIVELCO reserves the right to change anything in this manual without notice!
- MICROWELL spol. s r. o.
- SNP 2018/42, 927 00 Šaľa
- Tel.: (+421) 31/ 770 7585, 770 7082
- E-mail:[email protected]
- www.microwell.sk
Documents / Resources
|
NIVELCO PKK-312 Current Control
Switch
[pdf] User Manual
PKK-312 Current Control Switch, PKK-312, Current Control Switch, Control
Switch, Switch
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