LOCAL
On site control with radio modems
When working on site, the areas for heat treatment are often difficult to access. To avoid the risk of accidents and make the work easier, wireless communication is used between the PC and heating unit. Radio modems are used for wireless contact on site.
Heatmasters' control system for heat treatment enables wireless connection between the PC and the heating device using radio modems. The distance between the device and the monitoring location can be kilometres. The distance depends on the type of antenna used and the local conditions. The system requires heat treatment devices with Heatmasters' HM-Rigel controllers.
When a wireless control system is required, the PC and heat treatment devices are equipped with radio modems. Connection between heat treatment units and the PC is on-line and each unit can be monitored in real time.
Equipment for a long-distance monitoring system on site:
For the PC
- One radio modem
- Connection cable, PC <-> radio modem
- Power source for the modem
For one heating device
- One radio modem
- Connection cable; heating unit <-> radio modem
Technical data of radio modem
| Frequency Range |
370 … 470 MHz |
| Channel spacing |
25 kHz |
| Number of channels |
80 |
| Communication mode |
Half-Duplex |
| Interface |
RS-232 or RS-485, RS-422 |
| Interface connection |
D15, female |
| Transmission power |
1W, adjustable |
| Data speed of RS Interface |
300 ... 38400 bps |
| Data speed of radio interface |
19200 bps |
| Data formats |
Asynchronous data |
| Operating voltage |
9 ... 30 Vdc |
| Power consumption |
2,5 VA typical (reciever)
6,0 VA typical (transmitter) |
| Temperature range |
-25°C ... +55°C |
| Antenna connector |
TNC, 50 Ohm, female |
| Construction |
Aluminium enclosure |
| Size H x W x D |
137 x 67 x 29 mm |
| Weight |
250g |
The equipment complies with the ETS 300 220 and ETS 300 683 specifications.
The use of radio modems may require a local authority licence.
Print paper version (.pdf)