User Manual

Part # 68C-MKU, Edition 01/2007, Version 1.0 Page 19
3 SAFETY CONSIDERATIONS
CATTRON
®
believes that to safely operate any remotely controlled equipment, the overall
system needs to be configured so that movement or operation of the equipment will take place
only when the device is commanded to move or operate. For example; overhead cranes must
be equipped with a braking system which can only be released when an electrical signal is
sent to the motor. Removal of electrical power or loss of the radio transmitted signal results in
application of the brakes. One way to accomplish this is with a CATTRON
®
Electro-Hydraulic
brake package. Contact the factory for details – refer to the rear cover of this manual for
telephone numbers and e-mail addresses.
In keeping with this philosophy - NO COMMAND, NO MOVEMENT - CATTRON
®
has
designed your radio remote control system with the following safety and security features.
3.1 STANDARD SAFETY & SECURITY FEATURES
‘TransKey’:
Operational security is advanced to its maximum by the use of pre-programmed TransKeys
which, when installed to the OCU and MCU, define and enable the operating parameters.
NOTE: OCU and MCU TransKeys must not be swapped. The OCU (transmitter)
TransKey is black. The MCU (receiver) TransKey is yellow. Swapping
TransKeys will result in OCU/MCU fault indications and the system will
not go into operation.
ON/OFF power switch:
The OCU is provided with a rotary power ON/OFF switch that must be set to ‘ON’ in order
to send commands to the MCU. If the power switch is set to ‘OFF’, the MCU will remove all
commands from the controlled machinery, stopping all movement.
Red System STOP Switch
:
Operating the red STOP switch while the OCU is operational will stop commands to all
outputs including the mainline control relay (OPR).
Operate relay (OPR)
:
The operate (OPR) output relay(s) shall be wired to control a user-provided electro-
magnetic power contactor. The electro-magnetic contactor opens and closes the main
electrical supply circuit(s) to the controlled device.
Data Error Checking:
All communications from the OCU to the MCU contain error-checking information (16-bit
CRC Checksum). The entire data command packet must pass error detection tests before
being processed.