SC800 User Manual

User Manual - Page 52

For SC800. Also, The document are for others Nilfisk models: 56112000(SC750-26D), 56112004(SC750-28D), 56112006(SC750-28C), 56112012(SC750 ST-26D), 56112013(SC750 ST-28C), 56112016(SC800-28D), 56112018(SC800- 28C), 56112024(SC800-32C), 56112028(SC800-34D), 56112032(SC800 ST-34D), 56112780 (SC70- 28R)

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Service Manual: SC750, SC800, SC 750 ST, SC800 ST

Form Number 56043150 Page 52

Pin # Circuit Descripon Value Comments

Used

on Non

ST or ST

8 Baery Negave (Ground) 0.5mV With vacuum motor running Both

9 Vacuum Motor Current Sense input (voltage on

this wire represents the motor current)

181 mV Vacuum motor running with solu-

on cover open. Dropped to 157 mV

when ball oat was seated.

Both

10 Brush Motor Current Sense input (voltage on

this wire represents the motor current)

30mV Brushes free running – not contacng

oor

Both

11 Input from Brush Deck actuator posion switch

#1. Switch oats open when actuator is par-

ally extended (corresponding to normal scrub

pressure), and is closed to GND otherwise.

4.96V Normal scrub posion. Other posi-

ons 0.5mV

Both

12 Pin has 2 funcons:

1) Input from Brush Deck actuator posion

switch #2. Switch oats open when actuator

is fully extended (corresponding to maximum

scrub pressure), and is closed to GND other-

wise.

2) When an S.P.E. on-board baery charger is

installed and plugged into an AC outlet, the

input funcon of this signal is overridden and

instead becomes a 1-wire, bidireconal serial

communicaon line between the PC board and

the on-board charger.

2.91V Extra scrub pressure posion. Other

posions 795mV.

If the S.P.E. Baery Charger is plugged

in, voltage pulses then seles in

around 12V

Both

J3 Connector

Pin # Circuit Descripon Value Comments

Used

on Non

ST or ST

1 Baery “+“ lead 24.0v With vacuum motor running Both

2 Baery “-“ lead 0.5mV With vacuum motor running Both

3 Brush Remove contactor output 28mV When energized. Otherwise 24V Non ST

4 On-Board Charger Interlock input (input = key

switch voltage when on-board baery charger

is not plugged into AC outlet, oats open when

on-board charger is plugged in.)

25V Key on and Charger NOT plugged in.

When Charger is plugged in, drops to

116mV

Both

5 Reverse Direcon input from Speed Controller

(input = GND when moving in reverse)

2mV

23V

In Reverse.

In Neutral or Forward

Both

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Nilfisk SC800 Heavy-Duty Cleaning

User Manual - Page 52