Westermo GDW-11 - Manual (Page 15)

15 6615-2203
Interface specifications
Power
Rated voltage 12 to 48 VDC
Operating voltage 10 to 60 VDC
Rated current 350 mA @ 12 VDC
150 mA @ 24 VDC
75 mA @ 48 VDC
Rated frequency DC
Inrush current I 2 t 0.05A 2 s
Startup current* 0.75A peak
Polarity Reverse polarity protected
Connection Detachable screw terminal
Connector size 0.2 – 2.5 mm 2 (AWG 24-12)
Isolation to All other ports 3 kV
rms
50 Hz 1 min
Shielded cable Not required
* External supply current capability for proper startup
RS-232
Electrical specification RS-232 V.24
Data rate 300 bit/s – 115.2 kbit/s
Data format 7 or 8 data bits, Odd, even or no parity, 1 or 2 stop bits
Protocol Transparent
Retiming Yes
Transmission range 15 m
Isolation to Power port 3 kV
rms
50 Hz 1 min
Connection 9-pin D-sub female (DCE) and 5 pos Detachable screw terminal (DCE)
Connector size Detachable screw terminal 0.2 – 2.5 mm 2 (AWG 24 – 12)
Shielded cable Not required*
Conductive housing Isolated to all other circuits
* Railway installation close to the rails.
For a cable located inside 3 m boundary and connected to this port, the use of shielded cable is recommended,
this is to minimise the risk of interference. The cable shield should be properly connected (360°) to an earthing
point within 1 m from this port.This earthing point should have a low impedance connection to the conductive
enclosure of the apparatus cabinet, or similar, where the unit is built-in.This conductive enclosure should be con-
nected to the earthing system of an installation and may be directly connected to the protective earth.