MCT91508, MCT91512, MCT91516
MCT91508SMA, MCT91512SMA, MCT91516SMA
915 - 927 MHz Hand Held Transmitter with Fast Frequency Hopping

Description

The transmitters use fast frequency hopping (FFH) to allow up to eight transmitters to be used in the same area. No interference or jamming will occur. The FFH technology is usually used in very expensive equipment with military, medical applications. Elsema has developed a world first low cost, light weight hand held FFH transmitter.

The transmitters use a dual digital coding called Multicode Technology (MCT). This MCT digital coding can be either the 12-way dipswitch or the encrypted coding.

The 12-way dip switch allows for simple programming and involves the user to simply match the 12-way dip switch on both the transmitter and receiver. The encrypted coding is a random generated code which is programmed wirelessly to the transmitter and receiver. The encrypted code is usually use when more codes are required for high security applications. See setup instructions for more details on the dipswitch and encrypted coding.

The combination of FFH and MCT technology brings you a very sophisticated transmitter yet easy to use.

The MCT series transmitters are the first hand held Elsema transmitter to allow an external antenna to be connected. Connecting Elsema’s ANT915mini to the transmitters SMA connector will increase the transmitting range to over 350 metres.

Products in the Range

                  
1, 2, 3 and 4 Channel
The 1, 2, 3 and 4 channels are available in the smaller case.
MCT91501, One Button. MCT91502, Two Buttons. MCT91503, Three Buttons and MCT91504, Four Buttons.
See 1, 2, 3 and 4 channel data sheet for more details.

Accessories (Available Separately)

6LR61 9V Alkaline Battery (For better performance)

ANT915MINI 915MHz Antenna

Rubber Boots for all Hand Held Transmitters in MCT Series

Pictures are for illustration purpose only; final product may be different.

Return Acknowledgment and Maintain Link Features

The transmitters have two pairs of solder pads labelled JP1 and JP2. You will need to remove the battery and back cover to see the JP pads.

Return Acknowledgment:
If JP1 is shorted then a return acknowledgment is enabled.
If the receiver is in momentary mode the return acknowledgment on the transmitter will be 3 green flashes.
If the receiver is in flip flop mode and relay is “ON” then the return acknowledgment will be 2 green flashes.
If the receiver is in flip flop mode and relay is “OFF” then the return acknowledgment will be 2 red flashes.

It is recommended using the return acknowledgment feature for short range applications, up to 40 metres, since the transmitter does not have a full length receiver antenna built inside.

Return acknowledgment is only available with the 1, 2, 3 and 4 channel MCR receivers with the ack software.
Order Codes:
MCR91501ack for 1-channel,
MCR91502ack for 2-channel,
MCR91503ack for 3-channel,
MCR91504ack for 4-channel

Maintain Link:
If JP2 is shorted then a maintain link feature is enabled.
The maintain link feature receives one valid transmission every second to continue operations. If the link is lost than a safety shutdown occurs in the receiver. That is, all receiver relays will switch off. If the link is re-established a button on the transmitter needs to be pressed to activate the receiver again.

Customised labels

The transmitters are available without the front labels. Customers can purchase the MCT91508NL, MCT91512NL, MCT91516NL, which is a hand held transmitter without the front labels. This enables the customers to fit their custom made labels that can be a 8, 12 or 16 channels. Details of label dimensions are given below.

Customers who wish to have their own membranes can email us their designs.

Send your designs to mem@elsema.com

You can have your own company logo and specific text printed on the membranes. e.g. Up, Down, Right and Left or Start, Stop etc.

The minimum quantity for custom membranes is 10 pieces per order.

Technical Data

12-Way Dipswitch Setup Instructions

To program the transmitter to the receiver you simply match the transmitter and receiver dipswitches.  Do not use all dipswitches in the off position. This sets the transmitter to encrypted coding. See encrypted coding instructions.

To avoid interference or jamming from other MCT series transmitters make sure that the first 8 dip switches (Dipswitch 1 to 8) are different. The first 8 dipswitches select different frequencies.

Advanced Dipswitch Programming Features
This feature allows the user to configure very sophisticated systems by mixing and matching different MCT transmitters to MCR receivers.

Dipswitches 9, 10, 11 and 12 will determine the position of the first channel on the transmitter and receiver. Other channels are automatically sequentially placed.

Example:
Using a 4-channel MCR91504 receiver with a 1-channel MCT91501 transmitter.

If the MCR91504 has 0101 0100 1000 set to the 12 way dipswitch, this sets the receiver first relay (Ch.1) to position 9 i.e. 1000. The other channel addresses are sequentially placed.

This is shown in the table below:

To program a 1-button MCT91501 transmitter to receiver relay channel 4 you need to set the transmitters dip switch to
0101 0100 1011.

To program a 2-button MCT91502 transmitter to receiver relay channel 2 and 3 you need to set the transmitter dip switch to 0101 0100 1001. The second button on the transmitter automatically operates relay 3

This example is shown graphically below:

Encrypted Coding Setup Instructions

To change the transmitter and receiver to encrypted coding set all dipswitches on the 12-way dipswitch to the off position. The encrypted code is a randomly selected code out of 16 million different combinations.

The user can change the code by shorting out the Add/Delete pin on the receiver. The orange LED comes on while the Add/ Delete pins are shorted, to confirm the change of code was successful. If this is done all transmitters and receivers need to be programmed again with the new code.

Any programming combination is possible, for example transmitter to transmitter, receiver to receiver, transmitter to receiver or visa versa.

Programming Steps

1. Make sure all dip switches are in an off position on all transmitters and receivers.
2. Make sure power is connected to the receiver and transmitter.
3. If programming from a receiver, short out the Add/Delete pin to select a random code. The receivers orange LED comes on to confirm the change of code was successful. Do not do this step if you are adding extra transmitters to the receiver since already programmed units will be deleted.
4. Set one of the units, either receiver or transmitter, to broadcast its code. The broadcaster’s code will be programmed to the other units.
   
   4a. To broadcast the receivers code make sure all 12 dipswitches are off and then flick dip
   switch 12 on and then off. This is confirmed by the green LED being on for 10 seconds.
   
   4b. To broadcast the transmitter code hold down button 1 and flick dip
   switch 12 on and then off. This is confirmed by the green LED being on for 10 seconds. You can release button 1.
         
5. While broadcasting the code press button 1 on a different transmitter or receiver for 1 second and then release the button. The orange LED will flash twice to confirm successful programming.

Broadcasting will be latched on for 10 seconds or stop if any dipswitch is turned on.
If orange LED did not flash twice try programming again but move closer to the broadcasting unit.

During programming all channels are channelised programmed. That is, button 1 to relay 1, button 2 to relay 2, button 3 to relay 3, etc.

This programming method allows a user to program unlimited number of transmitters to the receiver or visa versa. You can even program a transmitter to a new transmitter. You do not need to get access to the receiver.