Westermo TD-29 - Manual (Page 5)

5 6611-2002
Description
The TD-29 is designed for communication on 2-wire copper cable (twisted pair).
Multidrop or point to point is possible.The TD-29 will support half duplex at baud rates
up to 19.2 kbit/s.
The TD-29 is easy to configure for different operating conditions with DIP-switches.
Character formats, baud rate, transmission level, DCD detection level and communication
interface are selectable. DTE-equipment can be connected through an RS-232 or
an RS-422/485 interface.The RS-232 connection can be made through either the DB-9
connector or screw terminal on the front of the unit.There are four baud rate settings.
When using the RS-232 interface the direction of communication can be controlled by
RTS handshake signal or incoming data.
When connecting in multidrop configuration the maximum bus length depends on the
number of units connected. (see below)
Maximum range and signal loss
Transmission speed
(bit/s)
Range
point-to-point
(km)
Signal loss
(dB/km)
Loss per unit
(multidrop) (dB)
2 400 16 1.5 0.2
4 800 14 1.7 0.2
9 600 11 2.1 0.3
19 200 9 2.5 0.4
Measured with Cat. 5 cable UTP 4x2x24AWG. Signal level >–24 dBm. The bus length depends on the line quality.
Turning time (RS-485)
Data rate bit/s Turning time µs
2 400 800
4 800 400
9 600 320
19 200 300
Environmental conditions
Environmental phenomena Basic standard Description Test levels
Temperatures Operating 5 to +50°C (41 to +122°F)*
Storage and transport –40 to +85°C (–40 to +185°F)
Humidity Operating 5 to 95 % relative humidity
Storage and transport 5 to 95 % relative humidity
Altitude Operating 2 000 m / 70 kPa
Service life Operating 10 year