Westermo DDW-142-EX - Manual (Page 15)

15 6642-22521
Interface specifications
Power
Rated voltage
24 to 48 VDC
Operating voltage 19 to 60 VDC
Rated current 245 mA (405 mA) @ 24 VDC (with 500 mA USB load)
124 mA (200 mA) @ 48 VDC (with 500 mA USB load)
Rated frequency DC
Inrush current, I²t 10.6 mA²s @ 24 VDC
24.7 mA²s @ 36 VDC
42.4 mA²s @ 48 VDC
Startup current*) 2 x Rated current
Polarity Reverse polarity protected
Redundant power input Yes
Isolation to All other
Connection Detachable screw terminal
Connector size 0.2 – 2.5 mm² (AWG 24 – 13)
Connect the unit using at least 18 AWG (0.75 mm²) wiring
Shielded cable Not required
* External supply current capability for proper start-up.
RS-232
Electrical specification
EIA RS-232
Data rate 300 bit/s – 115.2 kbit/s
Data format 7 or 8 data bits, Odd, even or none parity, 1 or 2 stop bits
Protocol Transparent, optimised by packing algorithm
Circuit type SELV
Transmission range 15 m / 49 ft
Isolation to Power, SHDSL, Ethernet
Galvanic connection to USB, Console
Connection RJ-45 according to EIA-561
Shielded cable Recommended
Conductive housing Yes
Number of ports 1