Danfoss AST-g Installation guide

User guide

AST-g driver

The driver is powered by two 9V batteries or external DC power supply.

Batteries may remain in the driver when external power supply is used.

The batteries will not be charged or otherwise connected to the circuit when the driver is connected to external power supply. A switch in the power jack disconnects the batteries when external power supply is connected.

Installation of batteries

To install batteries open the battery compartment on the backside of the driver. Use Philips size 2 cross screwdriver to open the lid

Connection to the external power supply

1. Connect the stepper motor to the terminals or to the M12 connector. Do not connect two stepper motors at the same time. Match the wire colour to the colour indicated on the driver. The driver is intended to be use with Danfoss ETS and KVS valve. Any bipolar stepper motor accepting 100mA/coil and with max 75Ω/coil can be tested with the driver. Phase 1 should be connected to the L1+ and L1– terminals, Phase 2 should be connected to the L2+ and L2– terminals.

2. Select speed

3. Push the ACTIVATE toggle in close direction to close the valve

4. Push the ACTIVATE toggle in open direction to open the valve Note: KVS 15 - 35 opens and closes in the opposite direction of all ETS sizes and KVS 42- 54.

5. Make sure that the POWER LED is lit. If not change the batteries or make sure the external power supply is connected and switches on.

6. Observe the terminal indicator LEDs At Speed above 1 step/sec the LEDs will  ash quickly. At 1 step/sec the LEDs will indicate how the phases are energized. Only one LED per phase should lit at a time. At higher speeds all LEDs seems to light up continuously.

Operating the valve at speed 1 step/sec will show how the phases are energized.

The LEDs will light in the following sequence:

ETS KVS 42 -54

open

Black

L1+

••

White

L1–

••

Green

L2+

Red L2–

KVS 15 - 35

open

If only one LED is on, the other phase is disconnected or broken.

If two LEDs lights but in a di erent sequence, the phases have been mixed, e.g. green and white wire swapped.

Speci cation

Speed [step/sec]

1, 18, 37, 75, 150 and 300 can be selected

Motor Connector Spring clamp connectors on front cover, and M12 connector on back panel.

Power 2 x 9V batteries type 6L61 or 12V-18Volt external supply, e.g. Mascot adaptor no.9883000047

Power connector standard 5.5 mm adaptor connector, centre contact positive.

Danfoss code no.: 034G0013

Take care not to mix up the polarity of the batteries.

User guide AST-g driver