1. How to make sure that the communication between controller and RS-485 reader or controller and     PC is working normally?

Pressing “7#" on the controller keypad, LCD will display 2 monitoring lines. 1st line signify the communication between controller and PC or main controller; 2nd line representing communication status between controller and RS-485 reader. The displayed figure should have uniform changes if RS-485 is running normally. If figures stop to change, that means communication breakage.

User can perform remote monitoring on controller status via Access Control Management Software, CS (Communication Server) module. When there is communication, the status button will shows green otherwise red.

2. After flashing the card, controller's LCD does not display card number nor had display wrong card     number?

2.1. Make sure to ground power supply from controller and reader. If both uses separate power supply, use         a wire to join together ground wire of both devices.

2.2. Check that the 2 wiegand wires are not connected wrongly.

2.3. Check the controller's wiegand setting has to be tally with the wiegand reader output format. If reader         format is 26 bits then the controller's wiegand setting has to set to 26 bit. Factory default on controller's         wiegand setting is 26 bits.

2.4. Make sure that card used is compatible to the reader. E.g. Mifare card is cannot be used with EM reader.

3. Can SK series of controller connect to 34 bits wiegand reader?

Yes. Has to change the wiegand setting using controller’s keypad; please refer user manual for detail instruction. Factory default is set to wiegand 26 bits with 1st bit Even and last bit Odd. Can also connect to wiegand 32 bits card reader like HID R10 reader.

4. How to connect RS-485 Converter to PC and controller?

RS-485 converter is used to convert RS-485 signal from controller to RS-232 signal to be sent to PC. Therefore, one end of the converter will connect to controller and the other end to PC. As shown on diagram ...

5. How to connect wiegand reader to controller?

As shown on diagram：

6. How to connect RS-485 reader to controller

As shown on diagram：

7. How to make use of "AutoDI" on SK controller to activate auto alarm triggering function?

7.1. Connect sensor signal to Controller's TTL / Optocoupler input. Sensor can be of magnetic door,         magnetic window, infrared curtain, smoke detector, infrared beam, voice-activated switch etc.

7.2. Connect alarm device to controller's alarm output.

7.3. On the controller's [Advanced Menu], set AutoDI to include DI input, Time Zone Table, Alarm Output and         Delay Alarm Time.

7.4. In the time zone table, once the controller received alarm signal from the sensor, the alarm will activate         the corresponding output, the alarm system connected to will then generate light and sound alarm.

7.5. Press [3] on the controller keypad follow by keying in 8 digits PIN to manually deactivate or stops AutoDI         or corresponding alarm.

8. What is optocoupler input? What is the different between TTL input and optocoupler input?

8.1. Optocoupler uses a beam of light to transmit the signals or data across an electrical barrier, and         achieve excellent isolation, the current is usually in between 4mA~22mA. Whereas TTL is relying on         high-low electric level to generate input signal; A TTL input signal is defined as "low" when <0.7V with         respect to the ground terminal, and "high" when between 2.5V - VCC.

8.2.Both end of optocoupler can be at 5V ~ 24V, 4mA~ 22mA. TTL is based on high-low electric level which         voltage should not go beyond rated VCC; generally 5V.

8.3.Under normal circumstances, dry contact signals such as switching relay signals are treated as        controller's TTL input, and voltage current signals such as the photoelectric switch are consider        controller's optocoupler input.