1. GENERAL INFORMATION
This manual describes the procedure to be followed to install and to adjust the CRANE-BOY, an electronic
load system. The information in this manual is applicable for both CRANE-BOY and INDI-BOY. CRANE-BOY
is an INDI-BOY mounted in an IP65 enclosure.
1.1. Introduction
The CRANE-BOY is an electronic system with a digital display and configurable threshold-based triggers. It
has been modified, tested and qualified by SENSY S.A. to provide for a safe lifting operation.
CRANE-BOY has a monitoring circuit to warn the crane operator of a possible break in the measuring wires.
Therefore, it is a self-monitoring device. In the case of a broken wire, a power cut or a short circuit in either the
supply cable and/or in the transducer measuring cable, the device instantly switches into a positive safety
mode.
It is possible to incorporate as options an analogue output (4-20 mA or 0-10V) and serial communication
(RS232). All available options are listed at the end of the manual.
1.2. Principle
The CRANE-BOY is fitted with a 4-relay board that must be used according to the wiring diagram described
below.
The relays are in the “open” position when the power is shut off (de-energised). When the CRANE-BOY is
turned “on” and the applied load is within the safe operating range, the relays are activated in the "closed"
position (SP1-SP2-SP3-SP4 are displayed in the front panel).
In normal operation, the relays are closed. (SP1-SP2-SP3-(SP4) are displayed in the front panel).
Relay allocation must be strictly respected :
- SP1 (measurement and transducer power supply safety)
- SP2 (overload threshold)
- SP3 (cable slack threshold or intermediate threshold)
- SP4 (optional threshold)
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