Terminal Control Modes
EMHEATER drives offer various methods for STOP/START and FWD/REV functions using the drive control board terminals (Digital Inputs instead of Keypad control). Please see below image listing the 2 modes for each of the 2-Line and 3-Line Control Methods, as well as descriptions that follow:
Two-Line Control – Mode 1
Forward/Reverse rotation of the motor is decided by DI1 and DI2 (most commonly used mode).
If only a Start/Stop function is required, any of the switches in Block A will be suitable for K1. If Forward and Reverse functionality is also required, the switch in Block B will be suitable. Note that for this mode, if power returns after a power failure, the inverter will respond to the actual state of the switch).
Two-Line Control – Mode 2
DI1 is the RUN enabled terminal and DI2 determines the running direction.
If only a Start/Stop function is required, any of the switches in Block A (image below) will be suitable. If Forward and Reverse functionality is also required, the switch in Block B (image below) will be suitable or alternatively 2 switches can be used (any of the switches in Block A will be suitable for K1 and any of the switches in Block D will be suitable for K2). Note that for this mode, if power returns after a power failure, the inverter will respond to the actual state of the switch/es).
Three-Line Control – Mode 1
DI3 is the RUN enabled terminal, and the direction is decided by DI1 and DI2.
- If SB1 is ON: the inverter will start Forward rotation when SB2 is ON and start Reverse rotation when SB3 is ON.
- If SB1 is OFF: The inverter stops immediately.
- During normal start-up and running, SB1 must remain ON.
For Run function (Forward and Reverse buttons) and Stop function, the 3-button switch from Block C will be required. Note that for this mode, if power returns after a power failure, the inverter will not respond to the state before power failure, so the Start button needs to be pressed again to enable the Run function).
Three-Line Control – Mode 2
DI3 is the RUN enabled terminal, and the RUN command is given by DI1 whilst the direction is decided by DI2.
- If SB1 is ON: the inverter will start running when SB2 is ON in Forward rotation when K is OFF and in Reverse rotation when K is ON.
- The inverter stops immediately after SB1 becomes OFF.
- During normal start-up and running, SB1 must remain ON, SB2 is effective immediately after ON
If only a Start/Stop function is required, any of the 2-button switches in Block C will be suitable. If Forward and Reverse functionality is also required, an additional switch from Block D will be required. Note that for this mode, if power returns after a power failure, the inverter will not respond to the state before power failure, so the Start button needs to be pressed again to enable the Run function).
