wireless Modbus-to-Modbus bridge
replacement for RS485 wiring
Modbus RTU serial protocol
wired/wireless combinations
very long range, no hopping
protected private connection
multiple slaves per device
multiple addressable groups
Technical specifications
| Serial |
| Baudrate | 2400, 9600, 19200, 38400 |
| Data bits & parity | 8n1, 7e1, 8e1, 8n2 |
| Message size | 64 bytes max |
| Galvanic isolation | 4kV RS485 to mains (SELV) |
| Termination resistor | 240 Ohm internal, always on |
| Radio |
| Frequency band | ISM 868MHz (EU) |
| Subband | L 866.8MHz, 25mW, 1% utility |
| Modulation | FSK 38.4kbps 80kHz bandwidth |
| Listen before talk | yes, limited delay 20ms |
| Group address | 32-bit, automatically generated |
| Connection time | 10s power-on to network ready |
| Message delay | 5..20ms, depending on size |
| Output power | 25mW |
| Operating range | 3..300m with optical visibility |
| General |
| Power supply | 230V, 50..60Hz, 1W |
| Terminals | 0.25..1.5mm2 |
| Operating conditions | -20..+50°C, 0..85% rh nc |
| Storage temperature | -40..+85°C |
| Dimensions | 93x45x27mm, 86mm antenna |
| Weight | 90g |
| Degree of protection | IP20 |
| Standards | EN60730-1, EN300-220, ERC-REC-70-03-h1.2 |
Order code
| WM-1 |