Resource Library - Frequently Asked Questions

The following is a list of frequently asked questions. The objective of a Technical Bulletin is to communicate technical information which is more complex than that illustrated in ILC Cut Sheets, Product Descriptions or Installation Documents. Almost all information documented in a Technical Bulletin is also included in the specific product User Guide. Please see User Guides for more information.

Can the relays be turned ON and OFF before the electronics or controller is powered up?

A: Yes, you can change the state of relays using the override switches on the right side of the input/output board. The transformers do need to be ON but the power switch on the controller can be OFF.

Will ILC relay panels automatically turn a relay ON after a power failure?

A: No, the relays used in ILC panels are magnetically held and remain in the same state as when the power failed. The panels can be programmed to have any or all relays turn ON or OFF when the panel is powered on. Refer to User Guide Section 3, under Relay Output Operations.

How can I test my programming once I have it all installed?

A: You have three options: (1) You can reset the time of day to 10 minutes before the programmed timer function and let the system run through its course. (2) You can use the force timer function to force a timer to activate; you do this through the keypad or through the software. (3) You can run the system at the 10X setting; this will speed the clock up 10 times (Standalone and SNET systems only). See User Guide Section 3.

Can a relay be controlled by more than one function?

A: Yes, you can have timer(s) and switches controlling the same relay.

Can I set up a password to restrict unauthorized access to the controller(s)?

A: Yes, you can program a six-digit numerical password into the system.

I forgot our password to get into our system. Can I read it from the system or create a new one?

A: Yes, contact ILC´s Technical Support for details.

Do I need to clear memory in the lighting control panel before I start programming it?

A: Yes, it is very important that you clear memory before programming, to ensure that no unknown programming exists. Refer to User Guide Section 3.


The Master panel will not communicate with one or two panels in the system.

A: Check the address of those panels from the keypad of the Slave panels and reset the address dials if necessary. Check the CAT5 data cable terminations for proper wiring pin-out of RJ45 connectors (refer to PDF ID0006) and test the cable using the proper CAT5 tester. Refer to the SNET User Guide, Section 4.

The LCD does not come ON and the power LED doesn´t light on the controller board.

A: Check to be sure that the control circuit breaker is on. Verify that the ON/OFF power switch on the main board is ON. Check the transformers secondary for proper voltage. The voltage should read approximately 24VAC between red wires and 12VAC between each red wire leading to the yellow wire (center tap).

Does it matter if the high voltage and the low voltage (of switches, status and data) share the same space?

A: Yes, by mixing high and low voltage you may cause an inductance into the wire that could cause the system to malfunction. Always keep low and high voltage separated.

What type of data cable needs to be used for a LightMaster system?

A: The ILC LightMaster system uses a standard CAT5, CAT5e or a CAT6 cable. The cable should be designed for the type of installation (plenum, non-plenum, etcetera). Specifications for this cable can be found in the CAT 5 data cable detail.

Can an ILC system take an input from another type of system, such as a BAS system, to turn relays ON or OFF?

A: Yes. One option is to insert a momentary or maintained dry contact closure directly into the input/output board. Also, ILC offers a D6 board that will accept a DC signal from the BAS. Another option is to use Modicon Modbus, Metasys N2, BACnet™, or LonWorks™ serial protocol communications using the appropriate hardware. Contact ILC for more information.

Can CAT5 data line be run underground between buildings?

A: Yes, it can, as long as the proper cable is used for the application. Special considerations also need to be observed, like distances from high-voltage lines. The preferred method would be to use a glass fiber cable for that type of installation.


How do I find out what firmware revision I am running in my panel?

A: You can check the firmware through the keypad or through software if available. From the keypad, press the EDIT on the panel desired and go to Special Functions and press Firmware Revisions.

Is the firmware the same for all of the lighting panels?

A: No, the firmware varies depending on the type of system you are running (Standalone, SNET or ENET). Contact ILC for more details.

Can the firmware be changed from one type of system to another or be upgraded?

A: Yes, the firmware can be changed or upgraded. Typically it involves replacing an EPROM chip on the controller. See LM SNET firmware upgrade and LM ENET firmware upgrade

Time Related

How do I set up a timer?

A: Refer to User Guide Section 3, under Time Based Operations.

Will an ILC system function based on Open and Close times of a store?

A: Yes, you have that capability by using the timers assigned as Open/Close timers that correlate to the times of your operation. Refer to User Guide Section 3, under Time Based Operations.

Will the ILC system sweep the lights off automatically every hour after the store closes?

A: Yes, by initiating the OFF hour sweeps function the programmed relays will sweep OFF every 1, 2 or 3 hours. Refer to User Guide Section 3, under Off Hours Sweeps.

I set up Timer #1 for 7:00 p.m., but the lights are not turning off.

A: After a timer is configured, you need to map the timer to an individual relay or a group of relays and then designate to turn ON or OFF. Refer to User Guide Section 3, under Time Based Operations.

I programmed the relay panel but lights are turning on at times I did not program.

A: Be sure to clear memory before you program the panel, as there may be timers that were mapped to relays by another person and not recorded. Check all timers for unwanted mapping to relays. Check for any previous inputs (hardwire or LightSync) that may have been programmed to control the lights.

Do I need to adjust the system time clocks for daylight-saving time?

A: No. By default the system clock will automatically adjust the time. This feature can be disabled and is described in User Guide Section 3.


Why won´t the lights turn off when the relay has opened?

A: If the relay appears to switch and the status LED goes ON and OFF, possibly the line and load circuit wires were stripped back too far and pushed into the relay at an angle causing a connection between the two wires. The contacts could also be welded due to a short circuit on the line at power-up.

The keypad is displaying all black squares, even after I turn the panel OFF and ON.

A: Verify that no wire clippings or drill shavings have fallen onto the controller or the keypad board. Contact ILC if the problem persists.

When I try to turn a relay ON at the panel, it turns ON and then immediately OFF.

A: Move the relay connector to another output, reprogram, and verify if this problem follows. If it follows, replace the relay. If it does not follow, contact ILC.

Why does a single relay turn off periodically on its own?

A: Check the programming for timers or inputs mapped to the suspect relay. Move the relay connector to another output, reprogram, and verify if this problem follows. Be sure that low and high voltage wires aren't run together. If the programming is good and the problem does not follow the relay, contact ILC.

Can ILC panels communicate with Lonworks or Bacnet?

A: Yes, we have individual modules available that mount directly into the panels. We have modules that communicate LonWorks, BACnet IP, and BACnet MSTP. We also offer a single entry point gateway if required for the facility.


How do I address the Lighting controllers?

A: The Lighting panels typically are set at the factory, but if changes are needed they can be changed using the two rotary switches in the upper-left-hand corner of the controller. See PDF ID0007. Be sure each panel has a unique address. The address can be verified through the keypad in the firmware screen.

Do the Lighting panels and LightSync devices use the same set of addresses?

A: No, they have separate sets of addresses.

At what address does the Master panel or the Network Manager need to be set to?

A: The Master panel in a SNET network must be set at address 01. If you have a Network Manager in an ENET network, the address is not applicable so it could be set at any address.

Hardwire Switches

My switches are not turning lights ON and OFF. What am I missing?

A: The Low Voltage switches need to be programmed in order to function. Refer to User Guide Section 3 for instructions on programming.

I have programmed all my switch inputs, but some of them don´t work.

A: The terminations may be loose or wired improperly. Check the status of the switch by closing the switch and observing the input status LED in the panel where the switch is landed, to verify the closure on the input. If the LED doesn´t light, check the wiring. If the LED does light, check your programming. This process may require two people.

For hardwired switches, what gauge wiring can be used?

A: We recommend 18AWG to 3000 feet; however, you can use up to 22AWG on shorter runs.

What types of ILC panel switches can I use to turn lights on and off?

A: You can use momentary, maintained, or momentary push-button switches to turn lights on and off. A list of switch types and their functions can be found in User Guide Section 3.

If I control Relays 1-3, do I need to connect Inputs 1-3 to the switch?

A: No, only one input needs to be connected to the switch. You can program the switch input to control any or all outputs.

LightSync Switches

The LightSync switches do not respond to the programming.

A: Verify that you can see the LightSync status and response from the keypad or software. Verify that the devices have unique node addresses. Verify that the cable lengths cumulative values have been properly calculated. Connect only one device to controller and check status and then add additional devices.

What could cause LightSync switches to have a slow response rate?

A: Check all of the data lines with the proper CAT5 tester. Check for devices that may be configured but not connected. Check for devices with duplicate addresses. These will all slow the response time.

What could cause LightSync switches to blink the status lights on and off?

A: This is probably due to a lack of power on the data line. Recalculate your cable run lengths and add a Power Supply unit where needed. Refer to User Guide Section 4.

I have multiple LightSync switches mapped to a relay and the switches occasionally need to be pressed twice to turn the relay ON or OFF. Can I change this?

A: You can correct this by mapping the pilot output to the relay being controlled.

How many devices can be powered on one data line?

A: The number varies depending on whether the data line originates from a panel, a PSR, a PS or a Hub. Refer to User Guide Section 4 or to PDF TB1408 and TB1412.

Is there an easy way to configure the cumulative power on the data line?

A: Yes, you can download from ILC´s Web site an Excel sheet for calculating the total power cumulative distance. We also have a worksheet (PDF TB1412) you can use in the field for recording the lengths between the devices.

Can I use hardwire switches along with LightSync switches on my system?

A: Yes, you can use a combination of both types of switches.

Can I disable switches in a hallway at times?

A: Yes, a run of LightSync switches can be disabled with a LightSync Disable Key switch. Refer to PDF ID0611.

I have a LightSync switch that is programmed to control three relays and another switch to control the first relay. When I turn OFF using only the first relay with the second switch, the first switch button doesn´t work. Why is this happening?

A: The first switch looks at the three relays as a group and references only the first relay, so if the first relay is turned OFF it appears to the controller that all of them are OFF. You could set up presets for those switches to make it function how you want it to. Contact ILC Technical Support for help if needed.

LightSync Devices

Why don´t panels of a SIB-4 communicate?

A: Route around each device separately to see if communication connects. Reroute the SIB-4 onto a separate run of its own.

What is the difference between a SIB-4 and a D6 and how are they used?

A: Both of the devices are data line input/output status interfaces that can be programmed to control one or all of the relays in ILC panels. Basically the SIB-4 has four I/OS points and works typically like ILC´s standard panel inputs. The D6 is designed to interface the BAS, Security or other systems that provide the inputs with a 10-24VDC signal that is programmed to control the relays. The status is an open collector output that can signal the BAS system (or other) status of relays. Refer to PDF ID0600 and ID0603 for installation information.


Why won´t the Hardwire photocell we installed send a signal to the switch input?

A: Check the wiring for the photo controller and the photocell. Refer to PDF ID0800. Check the voltage and polarity from the wall transformer (or other) to photocell controller. Check ON and OFF set points.


Can ILC relays in the LightMaster panels be remote-mounted?

A: No, the standard 2R9 relay is not designed for remote mounting; however, there is a relay designed for this purpose, called a transformer relay or a TR relay. Refer to the ILC Product Catalog for more details.

We are using TR relays (or contactors) with DOBs and the relays won´t always turn on and stay on. When we push the override switches in the panel, they seem to switch. What could be wrong?

A: TR relays and most contactors require a longer ON or OFF pulse time than the standard 2R9 relays. Check the relay drive pulse width setting (50 mS is required). Refer to User Guide Section 3, under Setting the Relay Pulse.

Can I control blower motors with the lighting control panel?

A: Yes, you can switch motor loads up to 1 HP @ 120VAC using ILC standard 2R relays.

What is the largest wire size that the 2R9 will accept?

A: The 2R9 and 2R7 relays will accept a 10AWG solid or stranded wire.

Can two 2R9 relays in an ILC panel be used to control 208V or 480V 2 pole loads?

A: No, the relays are not rated for this type of operation.


Is software necessary to program the ILC lighting panels?

A: Only the Extended network requires software. You may desire to have the software for the Standalone panels or the Standard network panels for ease of programming and backup.

How does the software interface the panels in a network system?

A: The interface can occur in several ways. One way is through a standard RS232 serial connection. For connections greater than 25 feet we have a PAK that converts the RS232 to RS485, which extends the distance up to 3000 feet. Another way is through a phone line using a modem-equipped controller for a SNET or an external modem for the ENET system. With the optional IP controller you can connect via TCP/IP over a local network or a wide area network.