Unit Specication
3500 Annapolis Lane North, Minneapolis, MN 55447
Telephone: (763) 509-2084 Fax: (763) 559-0108
ISSUE: 1 DATE: August 2004
ACW112D1312
Level Controller
GENERAL DESCRIPTION
The ACW112 Level Controller measures deviation from a gravity reference for mobile equipment such as hillside
combines and aerial lifts. Its sensing and switching components are contained within a single compact housing.
The Controller senses level through a suspended magnetic pendulum and Hall Effect sensors. Signals from the Hall
sensors provide ON-OFF electrical output to a three position, four way valve. The switching is instantaneous ON and
instantaneous OFF.
Dimensions of the ACW112D1312 in millimeters [inches].
CONNECTION DIAGRAM
Gauge points
for leveling
Clearance holes
for 1/4 inch bolts
(3)
95,2 [3.75]
47,6 [1.88]
9,52 [0.38]
138 [5.44]
119 [4.69]
9,52 [0.38] 76,2 [3.0]
4 leadwires
610 [24.0]
68,3 [2.69]
301A
ACW112
Black
Red
Yellow
Orange
P
owe
red on CCW error
Powe
red on CW error
1
1
1
Rotation as viewed from cover side fo leve
l controller
ON
OFF
Emergency
shut off switch
Fuse
5 A
Jog switch
B
att
ery
284B
© Danfoss, 2013-09 10102306 UNIT SPEC 1
TRIP POINT VARIANCE FROM ZERO REFERENCE
TECHNICAL DATA
Input voltage 12 V DC (11 to 15 V)
Voltage drop From input to output 2.5 V
Load current 4 A maximum
Supply current 100 mA plus required load current
Time delay 1/2 second
Damping uid 5000 CS
Switch point ±1°
Differential Typically less than 1/2 degree turn-on to turn-off.
The difference between the nominal turn-on and turn-off is less than or equal to 1/2 degree.
See diagram Trip Point Variance From Zero Reference.
Automatic controls are intended to move machine elements without operator input. This motion can be dangerous
to persons unfamiliar with the intended control action. Exercise care when operating the automatic control.
WWARNING
When the Level Controller is used as a switch to a tip alarm in rechargeable battery-operated electrical systems, the
warning device will not sound if the system voltage drops below the input voltage rating for the relay to the alarm.
WWARNING
This control uses a sensing signal which cannot be seen. This creates an extra danger of unforeseen stopping and
starting of machine components. Advise operators to turn the control OFF when people are near the sensor or the
controlled machine element.
FAILURE MODES AND WARNINGS
Switch
ON
OFF
0 - Degree
Output - voltage
-0.25 -0.20 -0.15 -0.10 -0.05 0.0 0.05 0.10 0.15 0.20 0.25
1755
© Danfoss, 2013-09 10102306 UNIT SPEC 2
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