YOKOGAWA EML500 Series, User Manual, Page: 18 / 85

2-5
IM80B80T10E 21th Edition : Jul.1,2007-00
< 2.OVERVIEW >
Output -pulse
characteristics :
Ton
T
Ton : 100 ±1.25 ms (fixed)
T : Varies depending on the ship’s speed
At Ton : Photocoupler
output
Continuity between terminals
Relay output “Open” or “Close” contact (normally “Open”)
Can be specified by setting dip switch SW9-1
(off : closed; on : open)

digital speed output : 2 circuits (as per NMEA0183)
Output circuit
P
N
SHLD
AM26LS31
Conforms to EIA RS422A
Output current at H level :
-20 mA
Output current at L level : 20 mA

Alarm contact : 4 circuit
(i)
State of contact Setting alarm speed
(master indicator)
Dip SW9-2
(master unit)
‘close’ in the Speed limit
Hi ON
Standard
Lo OFF
‘Open’ in the Speed limit
Hi OFF
Lo ON
(Note) For setting Hi and Lo, refer to 4.4.1
(ii)
State of contact Setting of JP1,2
‘Close’ at the occurrence of on error short between
2 and 3
 
3
 
2
 
1
‘Open’ at the occurrence of on error short between
1 and 2
 
3
 
2
 
1
(Note) Fix dip switch 9 to OFF
Error detection A/D converter error
Communication errors · GPS input error
· Communication error between the master unit and master
indicator
Excess of the speed sensor input range