NXT-MSC Controller LED and Jumper Definitions

NXT-MSC Controller LED and Jumper Definitions

1.0 Introduction

The following document outlines the functions and expected behavior of the LEDs and jumpers on an NXT-MSC controller.


2.0 NXT-MSC Controller Diagram





3.0 Controller LED Function and Behaviour

Purpose

LED 

LED Behavior

Network Activity LEDs
    a and b (D21 and D22)
Indicates that the controller is connected to the local area network. When the controller is connected to the network LED a (D21) will be quickly flashing green and LED b (D22) will be solid red.
Utility LEDs
c (D48) - CFG RST




d (D49) - D MODE








e (D50) - ULED1



f (D51) - ULED2




g (D52) - ULED3



h (D53) - ULED4

c (D48) - Controller heartbeat indicator - this LED will blink red approximately once every second to indicate the controller is healthy and functioning correctly.

d (D49) - Gateway communications LED - this LED flickers green every few seconds to indicate the controller is online to the MSC gateway. This LED also flashes quickly when a controller firmware upgrade is in progress.


e (D50) - UART - Port 1 traffic indicator - solid red when the controller is communicating to  device on bus 1.

f (D51) - UART - Port 2 traffic indicator - solid red when the controller is communicating to  device on bus 2.

g (D52) - UART - Port 3 traffic indicator - solid red when the controller is communicating to  device on bus 3.

h (D53) - UART - Port 4 traffic indicator - solid red when the controller is communicating to  device on bus 4.
RS-485 bus
overcurrent LEDs


i (D54) -  Bus 1 Over Current
j (D55) - Bus 1 Over Current
k (D56) - Bus 1 Over Current
l (D57) - Bus 1 Over Current









i (D54) - Solid red when bus 1 is drawing too much current and has shut-down.
j (D55) - Solid red when bus 2 is drawing too much current and has shut-down.
k (D56) - Solid red when bus 3 is drawing too much current and has shut-down.
l (D57) - Solid red when bus 4 is drawing too much current and has shut-down.

If a bus is drawing too much current it will shut down to protect the controller... When this condition is corrected, the LED will turn off and the bus will be activated.

Note: A 2-door controller does not have LEDs k (D56) or l (D57).
RS-485 bus
communication LEDs
m (D1)
n (D6)
o (D11)
p (D16)



These LEDs flash green quickly when the controller is communicating to a device. If there is no device or communication on a particular bus then the LED will blink green approximately once every 2 seconds.

Notes:
- A 2-door controller does not have LEDs O (D11) or P (D16).
- These LEDs will also be solid green when the controller is in a factory reset state and has no access control configuration in memory.
Relay state LEDs
q (D3) - Relay 1 state
r (D8) - Relay 2 state
s (D13) - Relay 3 state
t (D18) - Relay 4 state

These LEDs go solid red when the corresponding relay is activated. For example, using the default controller settings, D3 LED will go solid red when door 1 is unlocked.

Note: A 2-door controller does not have LEDs
s (D13) or t (D18).

Thermal fuse LED
u (D23)
If LED u (D23) is green, the power wires are reversed; if LED u is red, the unit is drawing too much current.
Power LED
  v (D26)
 The v (D26) LED is solid green when the controller is receiving the correct input power.



3.0 Controller Jumpers

  1. J3 - Reset Jumper - Both pins of J3 should be shorted when performing a factory reset on the controller.
  2. J1 - Tamper switch - Enclosure tamper switch - Tamper is clear when the pins are shorted (and the circuit is closed). The tamper switch is active when the circuit is open.

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