LT-2020 MR-2944 Installation and Operation Manual Rev.1 - Secutron

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MR-2944 Installation and Operator’s Manual2.2 WiringNote: Operator key and LED wiring is required only for units that do not come complete in acabinet.PowerThe Annunciator panel requires 24 VDC for operation from a power limited source. This shall beprovided from either the AUX 1 or AUX 2 auxiliary power connections on the Fire Alarm ControlPanel. The 24 VDC is connected to the +24 terminal (positive) and the GND terminal (negative).See Figure 1 for terminal locations. Note: Annunciator must be powered from panel or from aregulated, power-limited power supply listed for Fire Protective Signalling Service (or any otherpower supply for which compatibility has been verified by UL).Network to MR-2900Network wiring for communications to the MR-2900 is connected to the terminal pairs markedC1+/C1- and C2+/C2- (see Figure 1). The wiring is not polarity sensitive. COM1 (C1+/C1-) isconnected to COM2 the next panel in the network loop. Ensure that the Annunciator isprogrammed to communicate with the next panel or that COM1 is disabled as required in thedownloaded database. COM2 (C2+/C2-) is connected to the previous panel in the network loop.Figure 6 - Wiring DiagramNotes:1. If the annunciator is programmed for two port operation, both communications ports mustbe connected even if there is only one other unit in the system.2. If the annunciator is programmed for single port operation, only COM2 (C2+/C2-) isconnected.3. COM1 and COM2 are power-limited and supervised.4. For information on connecting a fiber optic network, please refer to the MR-D1010R FiberOptic Module’s Installation Manual.6
MR-2944 Installation and Operator’s ManualNetwork to MR-2400Network wiring for communications to the MR-2400 is connected to the terminal pairs markedC2+/C2- (see Figure 7). The wiring is polarity sensitive. COM1 (C1+/C1-) is not used.Figure 7 - MR-2400 WiringNotes:1. Ensure the MR-2944 is running the AN4A operating program.2. COM2 is power-limited and supervised.Operator KeysAll operator keys are wired between an X and a Y terminal. A key switch may be placed in serieswith the Y2 terminal to make certain operator keys limited access (see Figure 8 - Operator KeyWiring (Typical) on page 7). The figure is typical only; any, all or none of the operator keys canhave the key switch used.LEDsThe MR-2902-ANN(HTLD) Annunciator Strip, MR-2622 Annunciator Strip and the MR-2915 LEDDriver are connected to the Annunciator by ribbon cables (see Figure 6 - Wiring Diagram onpage 6). The eight connectors on the Annunciator are labelled P1 to P8. P1 is for zones 1 to 24,P2 for zones 25 to 48, etc. Each MR-2622 and MR-2915 controls 8 zones. Up to 3 MR-2622s orMR-2915s can be chained together to provide up to 24 zones per chain. Each MR-2622 willrequire a jumper for addressing (see below). No jumpers are set on the MR-2915 for addressingpurposes.Note: Do not use P11 for LEDs. This will cause damage to both the MR-2944 and the LED driver.The MR-2915 LED Driver has a 50 pin connector for connection to the LEDs of a graphicannunciator dispay. The pin outs are shown in figure 4.Figure 8 - Operator Key Wiring (Typical)7
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LT-2020 MR-2944 Installation and Operation Manual Rev.1 - Secutron

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