Westermo ODW-631 - Manual (Page 14)

14 6650-2243
Status
Port type Signal relay, changeover contacts
Rated voltage Up to 48 VDC
Operating voltage Up to 60 VDC
Contact rating 500 mA @ 48 VDC
Contact resistance < 50 mW
Isolation to Serial port and Power port
Connection Detachable screw terminal
Connector size 0.2 – 2.5 mm² (AWG 24 – 12)
Shielded cable Not required
* External supply current capability for proper startup
RS-422/485
Electrical specification EIA RS-485, 2-wire or 4-wire twisted pair
Data rate 300 bit/s – 1.5 Mbit/s
Data format 9 – 12 bits
Protocol Start-bit followed by 8-11 bits
Retiming Yes
Turning time
(2-wire RS-485) One t
bit
t
bit
= 1 / Baud rate (Baud rate in bit/s)
Transmission range < 1200 m, depending on data rate and cable type (EIA RS-485)
Settings 120 W termination and failsafe biasing 680 W
Protection Installation Fault Tolerant (up to ±60 V)
Isolation to Status and Power port
Connection Detachable screw terminal
Connector size 0.2 – 2.5 mm² (AWG 24 – 12)
Shielded cable Not required
Interface specifications
Power
Rated voltage ODW-631: 12 to 48 VDC and 24 VAC
ODW-631 Ex: 12 to 48 VDC
Operating voltage ODW-631: 10 to 60 VDC and 20 to 30 VAC
ODW-631 Ex: 10 to 60 VDC
Rated current 300 mA @ 12 V
150 mA @ 24 V
75 mA @ 48 V
Rated frequency ODW-631: DC and 48 to 62 Hz
ODW-631 Ex: DC
Inrush current I²t 0.2 A²s
Startup current* 1.0 Apeak
Polarity Reverse polarity protected
Redundant power input Yes
Isolation to RS-422/485 and Status port
Connection Detachable screw terminal
Connector size 0.2 – 2.5 mm² (AWG 24 – 12)
Shielded cable Not required