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MJB5 Plus Gateway | 6 Relay 1 Relay 1 is NO when connected to mains and NC when no mains, this means the relay is “active”, when connected to mains (closed loop). The closed loop principal is to ensure that a notification is sent if power is missing on the bed. When mains is disconnected (power is missing), the relay will go from NO to NC which will automatically result in a notification (status indicator) on the OpenBus. Relay 1 can be activated via the patient control (Key1/Key4) or the attendant control (Key2 / Key3). When a key is activated, the relay will switch state from NO to NC for 2 seconds. After 2 seconds the relay will automatically change state from NC to NO. The status of the relay is indicated on the OpenBus and can be used for switching on an LED. Relay 1 OpenBus control box power mode Mains unplugged, the control box is in power-down or the OpenBus is not run- ning (Clock/data is missing) On mains or battery at “wake up” Notification level Notification Bed notification\** No notification Relay state NC\* NC NO Relay 2 Relay 2 is by default NC, with or without mains, (open loop). Relay 2 can be activated via the patient control (Key 1) or the attendant control (Key 2 / Key 3). When the relay is activated, it will switch from NC to NO for 2 seconds. After 2 seconds the relay will automatically change state from NO to NC. The status of the relay is indicated on the OpenBus™ and can be used for switching on an LED. By using the variant 504-020 will relay 2 be controlled by the MJB5 Plus variant 505/506 with switch input. Notification 1 = Switch input S2 / notification 2 = Switch input S1 When using this combination, is it important to have the MJB5 Plus 505/506 connected to the system all the time. If it is not connected, the Gateway MJB5 Plus will see it as a notification and the relay will be activated. The Gateway MJB5 Plus is “scanning” the OpenBus system. every minute for a notification. Relay 2 CB or OpenBus control box power mode Mains unplugged or the control box is in power-down On mains or battery at “wake up” Notification level No notification Bed notification\** No notification Relay state NC NO NC \* When mains is unplugged or CB or the OpenBus control box is in power-down, the relay will shift to NC state and generate a notification. \** Notification generated by nurse call or bed notifications.
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Example of closed loop 3 rd party site LINAK site In this state no notification Example of open loop 3 rd party site LINAK site In this state no notification MJB5 Plus Gateway | 7
