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[marke]

There are essentialy six different main control pcbs for the EMS series of soft starter.

They are as follows:

• EMSC05 - small standard duty (single SCR modules)
• EMSC15 - small Heavy Duty (single SCR modules)
• EMSC06 - medium standard duty (parallel SCR modules)
• EMSC16 - medium heavy duty (parallel SCR modules)
• EMSC07 - Large standard duty (Hockey puck SCRs)
• EMSC17 - Large heavy duty (Hockey puck SCRs)

The standard duty pcbs can be set for a starting current of between 100% and 300% of the motor rated current. The heavy duty pcbs can be set for a starting current of between 350% and 550% of the motor rated current.

The motor rating is set on a DIP switch according to a chart on the door of the starter. The start current ratio is also set on a DIP switch according to the chart on the door of the starter.

Like pcbs can be exchanged between starters provided that the DIP switch is set up to suit the attached motor. The pcb does nto have any "model" settings so an EMSC05 from a 7.5HP starter can be used in a 40HP starter and vice versa. The current weighting on the DIP switch settings is determined by the CT ratios.
This can be useful in determining if there is a pcb fault. Swap the pcb between starters and see if the problem moves.

A heavy duty rated pcb can be used in place of a standard duty pcb if the start current needs to be set higher than 300%, however the start current DIP switch settings for the heavy duty pcb are different from the standard duty settings. - You will possibly overload the starter if you set the start current too high. This can result in fuse failure, or in SCR failure over a period of time.

It is not possible to swap pcbs from different groups. i.e. an EMSC06 can not be used in place of an EMSC05 or EMSC07.

Best regards,

[GGOSS]

There was also a special main pcb known as the EMSC617 ie developed for larger 6 wire connected motors.