Monitoring system for heat grids

The PACcubes module PCA-STA31-HN1 is a special PACcubes station for internet-based monitoring of distributed heat grids. With this system, district heat grids as well as grids with a local heat source can be controlled. PCA-STA31-HN1 will be distributed with a solid aluminum housing.

The PCA-STA31-HN1 was developed from a customer-specific development project. For the development, the following requirements were in central focus.

  1. Parallel recording of data in a local memory and a central data cloud,
  2. Individualization of the task through graphical programming (intelligent controlling, messaging and data recording),
  3. Simple protection from unnoticed manipulation (sealing of the station),
  4. Quick and simple installation by staff without a special professional training (prepared installation kit),
  5. Automatic registration of the station in the data cloud without on-site configuration,
  6. Automatic default configuration of the available station data in the central data portal,
  7. Availability of VPN for remote maintenance and transferring the data over unsecured protocols.

Technical data

Processor ARM Cortex-A7 core 1.2 GHz
RAM DDR3 1014 MB RAM
internal flash eMMC 4 GByte
SD card yes
operating system Linux 4.x Debian 8
Interfaces 1 * RJ45 Ethernet 1 GBit/s
2 * USB (internal 8)
Mobile communication UMTS
I/O bus 1 * MBus for up to 80 MBus standard loads
1 * CAN 2.0B
Controller software
Programming software
iPAC
PACstudio
Power supply 24V-30V
Max. dissipation power < 8W
digital Input 4 * DI
digital Output 3 * DO 230V Relais
analog Input 4 * 4-20mA
8 * PT1000

Terminal diagram

Circuit diagram
Photo
List of inputs and outputs
Terminal Signal Type Description Mode of operation
10 Relay 1 A Output   250V~ / 30V- | 3 A
11 Relay 1 COM Output Relay 1 common connection 250V~ / 30V- | 3 A
12 Relay1 B Output   250V~ / 30V- | 3 A
13 Relay 2 A Output   250V~ / 30V- | 3 A
14 Relay 2 COM Output Relay 2 common connection 250V~ / 30V- | 3 A
15 Relay 2 B Output   250V~ / 30V- | 3 A
16 Relay 3 A Output   250V~ / 30V- | 3 A
17 Relay 3 COM Output Relay 3 common connection 250V~ / 30V- | 3 A
18 Relay 3 B Output   250V~ / 30V- | 3 A
20 24V VCC Input    
21 IN1 Input Analog Input 1 4- 20 mA
22 24V VCC Input    
23 IN2 Input Analog Input 2 4- 20 mA
24 24V VCC Input    
25 IN3 Input Analog Input 3 4- 20 mA
26 24V VCC Input    
27 IN4 Input Analog Input 4 4- 20 mA
30 T1 A Input Temperature 1 A PT1000
31 T1 B Input Temperature 1 B PT1000
32 T2 A Input Temperature 2 A PT1000
33 T2 B Input Temperature 2 B PT1000
34 T3 A Input Temperature 3 A PT1000
35 T3 B Input Temperature 3 B PT1000
36 T4 A Input Temperature 4 A PT1000
37 T4 B Input Temperature 4 B PT1000
38 T5 A Input Temperature 5 A PT1000
39 T5 B Input Temperature 5 B PT1000
40 T6 A Input Temperature 6 A PT1000
41 T6 B Input Temperature 6 B PT1000
42 T7 A Input Temperature 7 A PT1000
43 T7 B Input Temperature 7 B PT1000
44 T8A Input Temperature 8 A PT1000
45 T8B Input Temperature 8 B PT1000
50 GND Input Ground  
51 DI1 Input Digital Input 1 0-5 V LOW 11-30 V HIGH
52 GND Input Ground  
53 DI2 Input Digital Input 2 0-5 V LOW 11-30 V HIGH
54 GND Input Ground  
55 DI3 Input Digital Input 3 0-5 V LOW 11-30 V HIGH
56 GND Input Ground  
57 DI4 Input Digital Input 4 0-5 V LOW 11-30 V HIGH

PACkit HN1

PACkit HN1 is a complete installation kit for the PCA-STA31-HN1 module and has especially been developed for municipal utilities and housing administration companies. Besides the installation kit, several service modules are offered.

  1. Programming the specific application,
  2. Preparation and individualization of the internet infrastructure (from the software),
  3. On-site installation of the station,
  4. Individual adaption of the hardware,
  5. Training and workshops for graphical programming of the modules.