Laird Controls North America Inc. 818A 사용자 설명서
Command Pro Engineered Systems
User Manual
User Manual
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OFF/STOP:
While depressed, this button sends a STOP command to the receiver. The transmitter does
not need to be actively ‘ON’ to send this command. When this switch is released, the transmitter switches
off.
AUTO OFF:
AUTO OFF:
The transmitter switches itself off if no commands are sent for a predetermined time.
Normally this time is set to 15 minutes, but it may be programmed from 0 to 60 minutes, or disabled using a
RAC16 Series Programmer (01 to 60 = minutes, 00 = disabled).
Levers (21T34A/44A/74A) / Joysticks (21T54A):
Levers (21T34A/44A/74A) / Joysticks (21T54A):
When in the neutral (center) position, no commands send.
When a paddle moves from the neutral position, a command generates proportional to the amount of
movement (the further the lever is pushed, the faster the movement is commanded).
Push-to-Operate (PTO) Switch (Optional):
Push-to-Operate (PTO) Switch (Optional):
The PTO or ‘Dead Man Switch’ is a safety device. The
transmitters are normally programmed so that the switch that activates this function must be depressed
before any motor or other critical function can operate (consult the Configuration Sheet if this switch has an
alternate use in your system).
First-Come First-Serve (FCFS) (Optional): The First-Come First-Serve option allows use of multiple
First-Come First-Serve (FCFS) (Optional): The First-Come First-Serve option allows use of multiple
transmitters with one receiver, one at a time. The receiver scans a preset list of ID Codes. When a valid signal
is received, the receiver stops scanning and responds only to that transmitter’s signal. When the signal is no
longer being received (that is, the transmitter has been switched off or is out of range), the receiver again
scans until another valid signal is received.
Pitch-and-Catch (Optional):
Pitch-and-Catch (Optional):
Pitch-and-Catch is similar to First-Come First-Serve but adds the safety
requirement that the operator in control must release or ‘pitch’ the control before another operator may
assume control. It also allows control transfer from one operator to another without pausing operation. Once
the transmitter has taken control of the receiver, the pitch button is the only way to release control of the
receiver so that other transmitters can take control. Once the receiver receives a valid pitch command, the
receiver then looks for the next programmed ID code. A Catch is made when the ID code from the next
transmitter is recognized. If a catch is not made within a pre-set time period, the receiver will revert to First-
Come First-Serve until a valid ID code is recognized. Any switch can be programmed as the pitch button.
Note: If a transmitter malfunctions after the receiver has taken control, the only way to release the
receiver is to cycle power to the receiver.
A- B Switch (Optional): Selector switches can be provided to control more than one similar function with
the same controls (i.e. controlling trolley/hoist A, trolley/hoist B, or both A and B simultaneously). On the
handheld transmitters, a single pushbutton cycles between A, B, Both, and OFF each time the button is
pressed. LED indicators show the control status.
Key Switch (Optional): The key switch option can prevent the use of the transmitter by unauthorized
Key Switch (Optional): The key switch option can prevent the use of the transmitter by unauthorized
personnel. The key switch is electrically connected between the battery and the electronics so that all power
is removed when the switch is in the OFF position.
Note: Once power is applied, the red LED illuminates and the transmitter performs a self-test procedure
lasting approximately three seconds. The transmitter may be switched to ‘ON’. Under standard
operating conditions, the LED flashes green once when the transmitter switches to ‘ON’.
Magnet Control (Optional):
An additional safety feature is built into systems that use a lifting magnet.
The two-button design uses one button labeled MAG LIFT (or LIFT) and one button labeled MAG DROP (or
DROP). Pressing the LIFT button energizes the magnet. Pressing LIFT and DROP at the same time de-
energizes the magnet and drops the load.
A time-delay is built into the circuit, so the buttons must be held for nearly one second before the magnetic
A time-delay is built into the circuit, so the buttons must be held for nearly one second before the magnetic
controls activate. An additional switch may be provided for fanning or dribbling the load. Pressing the button
labeled FAN or MAG FAN while pressing MAG LIFT activates the fan drop function. Again, a time-delay is
built into the circuit, so these buttons must be held down for nearly one second before the magnetic controls
activate.