HETRONIC Pocket-MFSHL User manual
User’s Manual
Pocket-MFSHL Transmitter
1. DESCRIPTION
The Pocket-MFSHL transmitter has a coder board with 11 digital channel(DK) inputs. It includes a
Low Voltage Indicator (LVI) warning, 1% duty cycle and 2 seconds turn off time. It also includes
switch detection on power up to ensure that no switch is active when the battery is inserted. The RF
section uses FM-RF with 915MHz frequency and 76800 baud rate.
Note: Operation is subject to the following two conditions: (1) this device may not
cause interference, and (2) this device must accept any interference that may cause
undesired operation of the device.
2. TECHNICAL SPECIFICATIONS
Note: The user is cautioned that changes or modifications not expressly approved by
the party responsible for compliance could void the user’s authority to operate the
equipment.
Temperature Range -20oto +70oCelsius
Supply Voltage Range 2-5 VDC
Supply Current 42mA max
28mA for 5 seconds on startup
Outputs RF-Data
2 LED
Inputs 11 digital
RF Specifications
Frequency 915.0 MHz
Modulation FM-Binary FSK
Deviation 64KHz
Output Power 5dBm
3. TRANSMITTER PARTS
Battery Cove
r
Battery Compartment
(3 AA batteries)
Switches
4. FUNCTIONAL DESCRIPTION
4.1. General Description
• This transmitter is designed to transmit with RF-transmission duty cycle of 1%.
• The transmitter will turn off automatically 2 seconds after all buttons are released.
• STOP (S1) is an emergency stop button that has priority above all other buttons.
• START (DK1/2) is a start or horn function. This button can be used to reset error in the receiver
(Overload/ Main Contact error).
• DK3-8, DK11-13 are regular digital channels
4.2. Switch Error Detection
The transmitter unit has a function that detects when a switch is broken. If a switch is active when a
battery is inserted the unit will go into an error state. The Red LED will come on and stay on until
the active switch is turned off.
4.3. Low Voltage Indicator
The unit has a low battery detection function. Once the battery level becomes low, the Red LED will
come on solid while the Green LED keeps blinking with every telegram. If the voltage level reaches
a critical level, the transmitter will only send Emergency Stop telegrams.
4.4. LED Description
Green Flashing: Telegram Transmitted
Red ON, Green Flashing: Low Voltage Pre-Warning
Red Flashing: Emergency Stop Transmission
Red Flashing/Green Flashing at 500ms interval: Memory Error
Red Solid (on power up): Switch Error
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