Vaisala HMP228 - Manual (Page 93)

HMP228
M210282en-A Appendix 4: RS 485/422 serial port module
87
5. SPECIFICATIONS
Connections Berg sockets
on the main board screw terminals 0.5 mm² wires,
stranded wires recommended
Assembly plug-in module
Board dimensions 40 x 28 mm
Operating mode
(single or dual pair wiring)
half duplex
Network:
network type daisy chain
cable type twisted pair
line length max. 1000 m (3000 ft)
number of devices 32 devices on line
data speed 9600 baud max. for HMP228
transmitters
operating mode polling mode
common mode voltage range ±7 V
Operating temperature -40...+60 °C
Storage temperature -40...+70 °C