Why did the Legacy XP-GT or XP-GTR Controller not Release the EM Lock Although Controller Already Showed Valid Entry Access Message

Problem (Issue) Statement:	Why did the legacy XP-GT or XP-GTR controller not release the EM lock although controller already showed Valid Entry Access message
Description:	When card users flashed the valid access card at the legacy XP-GT or XP-GTR controller, the EM lock for the door was not released, even though the controller's LCD screen already showed the Valid Entry Access message.
Related Software:	NIL
Related Hardware:	XP-GT1200L XP-GT3200L XP-GT1200LABX XP-GT3200LABX XP-GT3200LE XP-GT3200LCPX XP-GT5000LE XP-GTR1200L XP-GTR3200L
System Application:	NIL
Symptom and Finding:	The EM lock for the door was not released, although the controller already responded to the flashed valid access card by displaying the Valid Entry Access message. The controller's LCD screen does not show the downlink icon of , as shown in the LCD screenshot as shown below: Figure 1: LCD Screenshot of the Controller without the Downlink Icon
Cause:	Incorrect wiring connection from Downlink (DC+ & DC-) to the relay board Jumper J2 at MAS-RBT (for XP-GT controller) relay board is closed OR Jumper J2 at MAS-RBU (for XP-GTR controller) relay board is open Controller's downlink comm IC faulty OR relay board comm IC faulty
Solution:	Summary: To check and ensure that the wiring termination is correct. To ensure that the Jumper J2 is correctly shorted / opened depending on the controller and relay board used. To verify the condition of the relay board and the controller. . . Step-by-step Guide: To check and ensure that the wiring termination is correct: 1 Unit XP-GT Controller to MAS-RBT Relay Board: Step 1: Please follow the wiring diagram as shown below: Figure 1: Wiring Diagram for Connection Between XP-GT Controller to MAS-RBT Relay Board . 2 Units XP-GT Controller to MAS-RBT Relay Board: Step 1: Please follow the wiring diagram as shown below: Figure 2: Wiring Diagram for Connection Between 2 XP-GT Controllers to MAS-RBT Relay Board . 1 Unit XP-GTR Controller to MAS-RBU Relay Board: Step 1: Please follow the wiring diagram as shown below: Figure 3: Wiring Diagram for Connection Between XP-GTR Controller to MAS-RBU Relay Board . . To ensure that the Jumper J2 is correctly shorted / opened depending on the controller and relay board used: For XP-GT Controller to MAS-RBT Relay Board: Step 1: Ensure that the jumper J2 at MAS-RBT relay board is opened. Figure 4: Location of Jumper J2 (Must be Opened) at MAS-RBT . For XP-GTR Controller to MAS-RBU Relay Board: Step 1: Ensure that the jumper J2 at MAS-RBU relay board is shorted. Figure 5: Location of Jumper J2 (Must be Shorted) at MAS-RBU . . To verify the condition of the relay board and the controller: Step 1: If the problem still persists, users are adviced to troubleshoot to ensure that the controller and the relay board units are functioning well. Connect the affected relay board unit to a known functioning controller to test if the relay board is in working condition. Connect the affected controller unit to a known functioning relay board to test if the controller is in working condition. . Step 2: If any of the units are faulty, kindly send them to our Service Center for repairs.
Common Issues:	NIL
Porting Date:	31/10/2019