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    Service explanation for JA-181M

    Wireless magnetic contact

    This product is part of the Jablotron 100 series alarm system. It detects the opening of a door, window, etc. It can also be equipped with an additional sensor, with a break or make contact on the output. The detector can also be used to detect the tampering of a roller shutter, if equipped with a CT-01 roller shutter movement sensor. The signal from the gear sensor is filtered so that small movements of the roller shutter during gusts of wind are suppressed. The JA-181M detector can also be used with an LD-81 flood detector.

    The product must be installed by a trained technician with a valid Jablotron certificate. The detector responds to increasing the distance from the magnet. The electronics are mounted on the fixed part of the door (window) and the magnet on the moving part. We recommend installing the detector vertically. Avoid placing directly on metal parts (they will negatively affect the operation of the magnetic sensor and radio communication). If the door (window) is made of metal, install the wireless detector outside the metal area and use an external magnetic sensor for detection (see connection of external sensor).
    With the JA-181M transmitter, two types of magnets are possible in the set. The standard magnet in a plastic housing (A) and a ring magnet (B) for use when there is not enough space for mounting, possibly for drilling into a door leaf or window. The correct placement of both magnets is shown in the following images, as well as the detection distances (in millimetres) when the distance of the magnet is increased over three axes of movement.

    Installation step by step
    1. Open the detector's screen (by pressing the snap clip)
    2. Screw the plastic back panel onto the fixed part of the door (window)
    3. Screw the magnet onto the moving part, its distance from the detector should be max. 5mm when the door is closed, the bottom edge of the plastic case of the magnet should touch the bottom edge of the detector screen (magnet can be left or right be mounted)
    4. Leave the battery disconnected and the screen open. Proceed according to the installation manual of the control panel (receiver). Basic Steps:
    • Switch the control panel to service and activate learning mode with key 1
    • Plug the battery into the detector - that's how it learns
    • End the learning mode with the # key
    To comply with the CSN-EN 50131-2-2 standard, the drop-in clamp of the screen must be locked by the supplied screw.
    If you are learning the detector in the receiver after the battery was already connected, first disconnect it, then press and release the screen contact (the residual energy will be used up) and only then execute the learning mode.
    Setting switches

    Switch 1: MG ON / MG OFF allows the internal magnet sensor in the detector to be switched off (OFF = sensor off). It is used in case only the activation of the external sensor is to be reported (connected to the terminal).
    Switch 2: INST / DELAY determines whether the detector is on the entrance way to the house and grants an exit and entry delay = position DELAY. This setting is only meaningful when used with the Jablotron control panel with set response NATUR. If a different reaction has been set in the detector's control panel, or you are using the detector with a JA-182N or JA-180N receiver, the switch setting has no meaning.

    After opening the screen, the detector always responds with a tamper signal.

    Detection of opening/closing
    The detector has two operating modes, indicated by one resp. two flashes of the signal light when inserting the battery. One flash means that the detector reports opening and closing to the system (factory setting). In this way, the status of the window or door can be followed. Two flashes mean that the detector only reacts when it opens (increasing the distance of the magnet).
    To switch modes, press and hold the screen's protective contact switch, insert the battery, and release the switch 3-5 seconds after inserting the battery. The detector will then flash once or twice, depending on the mode just selected.

    Connection of external sensors
    Other external sensor(s) can be connected to the detector. This allows simultaneous monitoring of several doors, possibly following other sensors. Inputs IN2 and TMP respond to contact closure from the common GND terminal. The IN1 input can be balanced with a 1k resistor or it will react in the same way as IN2 after disconnecting GND (automatic detection).
    IN 1 input When this input is activated, the detector emits the same signal as with the distance increase of the magnet. The built-in magnetic sensor can be turned off with switch 1.
    The possibility of a balanced input is used when connecting the detector to the NO contact of the output. By making contact, the resistance is bridged and with that comes the activation.

    Example of connection of external sensors with a break and make contact

    IN2 input This input is intended for a signal from the shutter sensor (type CT-01). The alarm signal is sent as soon as the contact of the shutter detector breaks at least three times within 5 seconds. An accidental contact break (accidental jumping of the roller shutter sensor due to wind) is filtered in such a way that no alarm signal is sent. If the contact is broken for a period longer than 1s, a tamper alarm is triggered.

    Example of connection of the IN2 input

    TMP input – when the contact of this input is broken, the detector sends the signal of opening the screen (tamper).
    Note: If one of the In or TMP inputs is not used, its terminal must be connected to the GND terminal.
    For the connection of external detectors, a cable with a maximum length of 3m must be used.

    Detector testing
    For 15 minutes after closing the screen, the detector indicates activation by means of the signal light. The Jablotron control panel can check the detector signal in service mode, including measuring the signal quality.

    Replace battery in detector
    The system checks the battery status and informs the user (possibly also the service technician) as soon as it starts to run low. The detector continues to operate and additionally indicates activation with a short flash of the light. We recommend replacing the battery within 2 weeks. The battery is replaced by the technician in service mode. After replacing the battery, it is recommended to test the operation of the detector.
    If a weak battery is inserted in the detector, its signal light will flash for approx. 1 minute. After that, the detector will work, but will report a low battery
    Do not dispose of a used battery with household waste, but dispose of it with chemical waste.
    Remove detector from system
    The system reports any loss of the detector. If you intentionally disassemble the detector, you must also delete it in the control panel.

    Technical parameters

    Power supply Lithium battery type LS(T)14500 AA (3.6V / 2.4 Ah)
    Typical battery life approx. 3 years (max. 20 activations/day)
    Communication band 868.1 MHz, Jablotron protocol
    Communication range approx. 300m (direct visibility)
    Typical off/on spacing mag. sensor see fig.
    Inputs for external sensor IN2 and TMP = break loops
    IN1=simple balanced loop
    Dimensions, weight electronics: 110 x 31 x 26 mm, 90g
    magnet: 56 x 16 x 15mm
    Environment according to EN 50131-1 II. inside, general
    Operating temperature range -10 to +40 °C
    Classification according to EN 50131-1, EN 50131-2-6, EN 50131-5-3 grade 2
    Further complies with ETSI EN 300220, EN50130-4,
    EN55022, EN60950-1

    The detector is designed and manufactured in accordance with the applicable provisions: Government Decree No. 426/2000 Coll., provided that it is used according to its intended purpose. Original Declaration of Conformity can be found on in the Advice (Support) section.

    Note: Although this product does not contain any harmful materials, do not dispose of it with household waste, but hand it in at the collection point designated for electronic waste.


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