Zapi AC-2 User Manual download pdf (Page 7)

AF2ZP0CE - ACE2 350/450 - User Manual Page - 7/83

3 SPECIFICATION FOR THE INPUT

DEVICES FILLING UP THE INSTALLATION

KIT

The ACE2 inverter needs some external parts in order to work. The following

devices complete the kit for the ACE2 installation.

3.1 Microswitches

- The microswitches must have a contact resistance lower than 0.1 Ω and a

leakage current lower than 100 µA.

- When full load connected, the voltage drop between the key switch contacts

must be lower than 0.1 V.

- The microswitches send a voltage signal to the microprocessor when a

function request (for ex.: running request) is made.

3.2 Accelerator unit

The accelerator unit can consist of a potentiometer or an Hall effect device.

It should be in a 3-wire configuration. The potentiometer is supplied through

CNA#2.

Potentiometer output signal must be input to CPOT (CNA#3), signal range is

from 0 to 10 V.

The negative supply of the potentiometer has to be taken from CNA#9 (GND), or

from CNA-5 (REV/ 1ST SPEED) if the diagnosis PEDAL WIRE KO is done. In

this case the hardware must be configured closing a jumper on the logic card.

Potentiometer value should be in the 0.5 – 10 kΩ range; generally, the load

should be in the 1.5 mA to 30 mA range. Faults can occur if it is outside this

range.

The standard connection for the potentiometer is the one in the Left side of next

figure (potentiometer on one end at rest) in combination with a couple of Travel

demand switches. On request it is also possible the handling in the Right side of

next figure (potentiometer in the middle at rest) still in combination with a couple

of Travel demand switches.

The Procedure for automatic potentiometer signal acquisition is carried out using

the Console. This enables adjustment of the minimum and maximum useful

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Zapi AC-2 User Manual Page 7