Konecranes CU1 - Description

26.03.1996 • KHH SEENXL13A
•For Authorized KCI Service Agents Only•
KCI Hoists Corporation reserves the right to alter or amend the above information without notice
Page 4
XL
Service Manual
CU1
KCI KONECRANES GROUP
KCI HOISTS CORPORATION
1 DESCRIPTION
CU1 is an electronic device for protecting the hoist from instant or cumulative
overloads. CU1 also monitors and handles other safety related situations.
CU1's microprocessor-based implementation has made it possible to include all the
following supervisory functions with XL-hoists:
1 Calculating the hoist's Safe Working Period (SWP)
2 Measuring operating hours (Run Time)
3 Counting the number of starts (Starts)
4 Counting overloading incidents (Overloads)
5 Overheating protection of the hoist motor (Temp)
6 Overload protection (Load)
7 Control of the hoist brake's wearing (Brake).
Specially-designed electronics and software guarantee the reliability of CU1 as a safety
device. Diversified self-checking also ensures safe operation.
Independent tests have been carried out to ensure that the unit conforms to the
strictest safety regulations.
Figure 1 shows the system level connections of CU1.
INPUT OUTPUT
Hoisting request
→
1)
→
Hoisting motor control
Hoisting active
→
Load sensor
→
Motor temperature
→→
Warning indicator
Brake wearing
→
(Option: Remote-light)
2)
1) indicator lights
2) Push-button switch
↑ Power supply
Figure 1:
Figure 1:Figure 1:
Figure 1: System level connections of CU1.
Note: CU1 is a safety device. To bypass or remove a CU1 is prohibited, because
all supervisory and safety features would be removed!