INTEGRAL RSA Application Controllers
Document Number: K21-04.10 | Version: en - 06.2001
Overview
The INTEGRAL RSA series offers microprocessor-based DDC (Direct Digital Control) application controllers designed for system-specific applications. These controllers can function as stand-alone control and interlock devices or integrate into a management system for remote process control. They are particularly well-suited for small heating, ventilation, and air conditioning (HVAC) systems.
The controllers consist of a base unit and a plug-in application module. The application modules are pre-programmed with specific HVAC applications and are available from regional offices. Engineering is minimized due to default settings, allowing for easy commissioning. If a standard solution is unavailable, custom programs can be developed using SAPIM (Structure and Parameter Identification Menu) and downloaded from a PC.
Controller Models
The following models are available:
- NRK16/A, NRK16-B/A, (NRK16-T../A, NRK14-T../A, NRK16-WEB/A): Control and interlock devices.
Types
| Model | Description |
|---|---|
| NRK16/A | Application controller with ten universal inputs and two analogue, two digital, and two combined outputs. |
| NRK16-B/A | Like NRK16/A, but with a panel for simple local operation. |
| NSA | Application modules, varying by country or region, for plugging into base units. |
| NRK16-T../A | NRK16/A + NITEL integrated communications module for up to three additional devices (see manual NT21). |
| NRK14-T../A | Like NRK16-T../A, but without analogue outputs (see manual NT21). |
| NRK16-WEB/A | NRK16/A + integrated NIWEB communications module for operation of up to 15 additional devices via the Internet (K1-07.62). |
Electrical Protection
The power supply is protected against overload by a PTC thermal element. All DC voltages are electrically isolated from the AC 24 V input. Inputs are protected against overvoltage (max. AC/DC 45 V) using low-pass filters to prevent measurement fluctuations. All outputs are sustained short-circuit proof. High frequency interference is suppressed by filters, or discharged via the earthed housing or the TE terminal (functional earth) for capacitive interference.
[Important] For direct connection of AC 24 V 3-wire peripheral devices, "GND" and "NS" (^) must be connected.
Notes:
- The NMID multiplexer enables four digital inputs to be connected to a universal output (see K21-06.55).
- For peripheral devices with special input or output signals (e.g., Pt100, phase cut, 3-position signals), the NTIO (NTIOS) single module carrier or an NATU adapter can be used (See K21-06.50 and K21-06.52).
- The T1/Ni1000 supply voltage can be disabled at the inputs (see page 5). DIP switches are provided to switch inputs between T1 and Ni1000.
Technical Data
General Specifications
| Supply voltage | Extra low voltage (SELV-E) |
|---|---|
| Nominal voltage | AC 24 V, 50/60 Hz |
| Max. tolerance | +15 / -10% |
| Power consumption | 3 VA (without output peripherals), Max. 12 VA (with output peripherals) |
| Fuse | Thermal element (PTC) |
| Supply voltage for peripheral devices and remote operator terminal | DC15V ±10%, electrically isolated from AC24V |
| Output voltage | Max. 150 mA |
Signal Inputs
| Number | Use | Input impedance | |
|---|---|---|---|
| Universal inputs | 101) | Can be structured as T1, Ni1000, DC 0...10 V, digital volt-free, or for connection of NMID | Ri (pull-up resistor) = 10 kΩ to DC +15 V or 100 kΩ to GND (change-over, see p. 6) |
| Remote control input | - | Use | Can be structured as T1, Ni1000, DC 0...10 V, min. 1.5 sink, digital volt-free contacts, or NMID |
| - | Input impedance | Ri (pull-up resistor) = 10 kΩ to DC +15 V |
Signal Outputs
| Number | Signal | Source current | |
|---|---|---|---|
| Digital outputs | 2 | DC 0 / 24 V, +20 / -15% | Max. 50 mA |
| Analogue outputs | 2 | DC 0...10 V | Max. 2 mA |
Combined Outputs
| Number | Type |
|---|---|
| 2 | One terminal with a digital and one with an analogue output (see data above). Digital signal switches ON when analogue output is > 5 V, OFF when < 3 V. |
Remote Control Output
| Range | High > 50 %, low < 30 % of analogue signal |
|---|---|
| Source current | DC 0...10 V, Max. 10 mA |
| Sink current | Max. 3 mA |
Product Data
| Accuracy | Class 0.5 |
|---|---|
| Sampling rate | Internal: 100 ms; Structure: 0.2 - 1 s |
| Data protection after power failure | Structures and parameters: > 10 years; Time / date: Equivalent to battery life; Adjustable values in NRK16-B/A: Equivalent to battery life |
| NSA application module | EEPROM Type 28C64 |
Connections
| Connection terminals | 2.5 mm2 screw terminals |
|---|---|
| Cable type and length | See installation instructions, K21-11.20 |
| Communication | RS bus: Transmission speed 9600 baud, Max. cable length 2400 m. Connection to RS bus via service socket using 10-core ribbon cable to NARB/A adapter. |
| Service terminal | NBRN operator terminal; plugs directly into service socket. |
Weight excluding packaging
| NRK16/A | 1.15 kg |
|---|---|
| NRK16-B/A | 1.25 kg |
| NSA application module | 0.06 kg |
Dimensions (W x H x D)
| NRK16../A | 162 x 252 x 52 mm |
|---|---|
| NSA application module | 24 x 59 x 49 mm |
Mounting
Snap-mounted on DIN rails or screwed to a flat surface. The NRK16-B/A can be installed in a control panel front using the Z402 mounting kit.
[Diagram: Physical dimensions and mounting configurations of the controller base unit.]
Safety
| Product safety | EN 61010-1 |
|---|---|
| Contamination level | 2 |
| Electrical safety | SELV-E (PELV to IEC 364-4-41) |
General ambient conditions
| Use | Installed in control panel |
|---|---|
| Temperature range | Operation: 5...45 C; Storage: 25...70 C |
| Ambient humidity | 10...90 %rh, non-condensing |
Conformity
This product meets the requirements for CE marking and is tested.
Construction
The base unit comprises a metal housing and a printed circuit board (PCB). The housing includes a base and cover, accommodating the PCB and two-part plug-in connection terminals. These terminals are accessible from the top and bottom, allowing direct connection of peripheral devices without removing the cover plate.
Additional terminals and a 10-pin ribbon cable connector are provided for power supply, operator terminal, and RS bus communication (refer to page 5 for connection diagram and suitable devices).
The cover plate has an aperture for the plug-in application module, a rotary switch for setting the RS bus address, and three LEDs:
- Green (power): Power supply / basic test (on = OK).
- Yellow (Tx RS): Normal operation / RS bus communication (flashing = OK).
- Red (error): Error indicator.
The NRK16-B/A model includes additional elements for control and display (see page 8).
Mounting and Dimensions [mm]
The base unit can be fixed with four screws onto any surface or snap-mounted on two rails. For mounting rails, follow these steps:
- Fix the top rail.
- Fit the bottom rail to the base unit and snap the unit onto the top rail.
- Fix the bottom rail.
[Diagram: Physical dimensions and mounting configurations of the controller base unit.]
[Caution] The application module is a static-sensitive component. Before inserting or removing the module, disconnect the base unit from the power supply. Do not touch the contact pins in the base unit.
[Caution] Do not touch the PCB. Electronic components can be damaged by electrostatic discharge. Handling the PCB without observing electrostatic precautions will invalidate the warranty.
Opening the Controller
Follow these steps:
- Ensure necessary EMC precautions are taken.
- Undo the four cross-head screws between the terminal blocks.
- Carefully lift off the cover.
Connection Diagram and Suitable Peripheral Devices
[Diagram: Detailed connection diagram showing terminal assignments for digital inputs, analogue inputs, remote control, power supply, and RS bus communication. It illustrates connections for T1/Ni1000 sensors, DC 0-10V, NMID, remote control, service, NBRN (RS485), and AC 24V power.]
Notes:
- The digital outputs (C, D, E, F) are active-type outputs, DC 0 or 24 V (max. 50 mA).
- Outputs C and D can function as both digital and analogue outputs. The digital (24 V) signal activates when the analogue output is > 5 V and deactivates when it is < 3 V.
- Other input and output types can be connected via the NTIO adapter and suitable input or output modules.
Suitable Peripheral Devices (Examples)
| Device | Description | Documentation |
|---|---|---|
| T1/Ni1000 | Sensors with T1 or Ni1000 measuring elements | Various |
| ZM100/A | Terminal housing for DC 0...10 V valves | CA2N4591 |
| NTIO | Single terminal module carrier | K21-06.50 |
| NATU | Adapter for special signals | K21-06.52 |
| NMID | Multiplexer (to increase the number of digital inputs) | K21-06.55 |
| Room operating units | See page 7 |
Sensor Selection (T1 or Ni1000)
Both T1 and Ni1000 sensors can be connected to the RSA application controllers. DIP switch S182 adapts the controller to the required sensor type. Access to S182 is possible after removing the NSA plug-in application module. The changeover affects inputs in blocks of eight and three (UI01...UI08 and UI09...UI11).
[Diagram: Printed circuit board (PCB) highlighting the location of the T1/Ni1000 sensor selection switch (S182) and input jumpers (X310-X380, X410-X420). Includes rotary address switch, firmware, battery, and application module slot.]
Settings for Switch S182 (T1/Ni1000)
| Switch S182 | Sensor | Inputs |
|---|---|---|
| OFF / OFF | T1 | UI01 to UI08 |
| OFF / T1 | T1 | UI09 to UI16 |
| ON / Ni10001) | Ni10001) | UI01 to UI08 |
| ON / Ni10001) | Ni10001) | UI09 to UI16 |
Note: When setting input parameters in INTEGRAL PLAN, use the T1 input range for Ni1000 sensors. The controller is adapted via hardware; SAPIM software is unaffected.
The factory setting is T1.
Inputs and Jumpers
The jumpers (X310-X420) are located on the PCB and are used to disable the pull-up resistors (Ri = 10kΩ) for the T1 and Ni1000 sensor supply voltage individually at inputs A (UI01) to J (UI10). This is required for devices that cannot sink current. Jumpers are not accessible without opening the controller housing.
Factory settings enable the sensor supply voltage. To disable, move each jumper one position to the left.
| Input | Jumper | Input | Jumper |
|---|---|---|---|
| A (UI01) | X310 | F (UI06) | X360 |
| B (UI02) | X320 | G (UI07) | X370 |
| C (UI03) | X330 | H (UI08) | X380 |
| D (UI04) | X340 | I (UI09) | X410 |
| E (UI05) | X350 | J (UI10) | X420 |
[Caution] Incorrect jumper positioning can lead to offset voltages with active signal transmitters, preventing a zero-point reading.
Operation and Service
The controller can be operated via:
- Remotely, from a room operating unit.
- Via the RS bus, using an operator terminal or PC.
- NBRN-.. operator terminal or service PC for service and commissioning.
- NRK16-B/A for simple local operation (see page 8).
- NRK16-WEB/A for operation via an Internet browser.
Remote Operation
Connection terminals K1, K2, K4, and K6 are used for remote operation from KR.. room operating units. PB.. operating units connect to universal inputs A..J.
Suitable Room Operating Units
| Unit | Functionality | Documentation |
|---|---|---|
| KRT-1B | Room temperature measurement, setpoint adjustment, mode selection (AUT, ON, OFF), heating time extension (by 1, 2, or 4 hours). | CA2N1612 |
| KRT-1L | Room temperature measurement, setpoint adjustment, mode selection (AUT, ON, OFF), holiday mode extension (by 1, 2, or 3 days). | CA2N1613 |
| KRU-1 | Room temperature measurement, mode selection (AUT, ON, OFF), timer module with independent time function. | CA2N1614 |
| PBA | Room temperature measurement, setpoint adjustment. | CA2N1651 |
| PBC | Room temperature measurement, setpoint adjustment, digital display of room temperature. | CA2N1655 |
Refer to relevant documentation for maximum cable lengths.
Operation via RS Bus
[Important] For RS bus communication, the controller must have the correct address set via the rotary switch on the cover plate (factory-setting: Address 1).
The controller can be operated remotely via:
- NBE remote operator terminal (see K21-05.18).
- NBRN-.. operator terminal (see K21-05.10 and 12).
- A PC running INTEGRAL DIALOG service software, connected via NITEL.. communications module (see K21-07.30) or NARC RS485-RS232 adapter.
- An Internet browser, via the NIWEB communications module.
When integrated into a higher-level system (e.g., INTEGRAL MS1000, MS2000, TS1500 building management systems, or DESIGO INSIGHT), controllers can also be operated through these systems with advanced graphics-based operation.
Service and Commissioning
For service and commissioning, an NBRN-.. terminal or a PC can be connected directly to the controller's service socket. This socket is also used to download application-specific SAPIM programs from a PC (not required for pre-programmed modules).
User Manuals
The following user manuals are available for the operator software:
- K23: NBRN.. operator terminals
- K9: INTEGRAL DIALOG
- CA12U3290: NIWEB User manual
- CA1B9110: DESIGO INSIGHT
Simple Local Operation with the NRK16-B/A
The NRK16-B/A's cover plate features controls for direct operation. The functions of the display and switches are determined by the selected application module.
[Diagram: NRK16-B/A front panel controls, identifying rocker switches (1), four-digit LED display (2), display-selector keys (3), channel LEDs (4), and setpoint adjustment keys (5).]
Each rocker switch has three positions, with functions varying by application module. The allocation of two setpoints and two measured values also depends on the application. These four values can be displayed using the appropriate selector key. Setpoints can be modified using the <+> and <-> keys, which also act as repeating keys when held down. Each value is associated with a red channel LED. Some applications allow adjustable upper and lower limits for setpoints via an operator terminal.
LED Function Test
Simultaneously pressing the two lower selector keys should illuminate all segments of the display panel and the channel LEDs.
Alarm Handling
The display panel can indicate alarms based on the selected application. Codes A1 to A9 can be displayed (A1-A8 for application-defined alarms, A9 for a common alarm). Alarms do not affect controller operation. While a measured value or setpoint is displayed, the associated channel LED will flash, indicating an active alarm. The alarm code can be redisplayed by simultaneously pressing the two upper selector keys.
