MEDHA Version 2 and Version 3 Differences

Version-II	Version-III
4 line display with numeric keys only	6 line display with alpha –numeric keyboard along with 4 function keys  i.e., F1 , F2 , F3 , & F4 .
Buzzer provided in display unit	Buzzer provided outside the display unit
Power Setter switch is not available.	Power Setter switch available. Keeps the rear loco in IDLE when enabled in lead loco. DB will work in all positions in all locos
Extended DB can be provided	Extended DB is provided EDBR relay will energize at 21.5 Kmph through MEP. Extra EPPCs will be provided. Only 50 % of Grids will be connected
Rectifier Fuse blown status is not monitored by MEP. Only LED indication.	Rectifier Fuse blown status is monitored by MEP. Engine rpm and power will be restricted to 4th notch.  Message will be displayed.
When TANGI value is more than 0.4amps “Power Circuit Ground Fault” message will be displayed. Full Power cut off & engine idling will take place.	When TANGI value is more than 0.4amps - message will be displayed with power de rating When TANGI value reaches 0.9amps. Full Power cut off & engine idling will take place.
External stand alone speed recorder required.	External stand alone speed recorder not required. Mcp will send analog signal for SPM indicator
Fire – Mcp will not identify whether fire is in LEAD or TRAIL loco.	Fire – Mcp identifies clearly, whether fire is in Lead or Trail Loco.
Water Pressure Sensor not available.	Water Pressure Sensor available. Action taken based on LWS and Water Pressure signals (From 3rd Notch onwards)
CCB not available.	CCB is available and CCB does not permit blended brake in TRAIL loco.
When engine runs IDLE for more than 10mins, brings engine rpm to 350 if governor supports.	When engine runs IDLE for more than 05mins, brings engine rpm to 350 only if lube oil pressure is more than 1.7kg/cm2. During low IDLE rpm if lube oil pressure reaches 1.2kg/cm2 Mcp brings engine to IDLE.
Pre Lubrication is available	Pre Lubrication is available with slight modification. Pre Lubrication is avoided if engine is re-cranked with in 30mins. of last shut down. A countdown timer indicates time left for cranking.
Post lubrication will work only when engine is shut down through STOP button	“Post Lubrication ON. KEEP breakers ON” message will be displayed Post lubrication for 5 mins. will work for any type of engine shut down.
TM cut out through MCOS switches.	TM cut out through Display
Soft Key Operation not provided	Soft Key Operation Provided