Masibus DDU-44, User Manual

Page: 8 / 36

Model: DDU-TM-44/46 or DDU-44/46
Doc. Ref. no. : - m06c/om/101
Issue no. 04
User’s Manual
Page 8 of 36
2.2 Time Signal Input
2.3 Time Signal Output
Note: If DDU-44/46 or DDU-TM-44/46 is in sync using Serial [RS232/RS485] than
do not use Serial [RS232/RS485] for Retransmission.
Isolation (Withstanding voltage)

Between primary terminals* and secondary terminals**: At least 1500 V AC for 1 minute

Between primary terminals* and grounding terminal: At least 1500 V AC for 1 minute

Between grounding terminal and secondary terminals**: At least 1500 V AC for 1 minute
* Primary terminals indicate power terminals
** Secondary terminals indicate RS232/485.
Insulation resistance:
20MΩ or more @ 500 V DC between power terminals and grounding terminal
Input Description Physical Interface
Serial RS485

Protocols:
NMEA-0183[RMC] / NGTS/ T
– Format

Baud Rate: 9600/19200
Plug-in type Connector[Standard 4-pin MSTB
Type]
[Cable Size:2.5 sq.mm]
Serial RS232
RF Wireless Input

Wireless frequency: 866 MHz

Line of site distance:
Approx 600 meters
(Depends on Site Conditions)
Wireless
Output Description Physical Interface
Serial RS485

Protocols:
NMEA-0183[RMC] (only Time and Date
Parameter Present in frame other Parameter
as indicated zero)

Baud Rate: 9600/19200
Same connector as Input
Serial RS232
RF Wireless
Output

Wireless frequency: 866 MHz

Line of site distance:
Approx 300 meters
(Depends on Site Conditions)
Wireless