Moravian University — Information Technology
Installing a CyberData Outdoor Intercom with a Hubbell/GAI-Tronics 540-001 Constant-On LED Strobe
Zoom Phone Emergency Phones

Moravian University — Information Technology

Article Type	How-To / Installation Guide
Applies To	CyberData SIP Outdoor Intercom (P/N 011186) paired with a Hubbell/GAI-Tronics Model 540-001 LED Strobe
Audience	IT / Telecom field technicians, electricians assisting with installation
Summary	Wiring a call-box strobe so it stays lit at all times (constant-on) and flashes for the duration of an active call.

 

This article documents how to install and wire a Hubbell/GAI-Tronics Model 540-001 LED strobe light so that it works alongside a CyberData Outdoor Intercom (P/N 011186). The article will also cover the programming needed for the CyberData device. The finished installation behaves in two states:

•Constant-on: the strobe stays lit steadily at all times the fixture has 120V power, so the call box location is visible day and night.

•Flash-on-call: when someone presses the call button and the intercom places a call, the strobe switches to a fast flash (240 flashes/minute) for the duration of the call, then returns to steady illumination.

The two devices use completely separate power sources: the strobe runs on building 120VAC, and the CyberData intercom is powered over Ethernet (PoE). The only wired connection between the two devices is a low-voltage signal pair that lets the intercom's internal relay tell the strobe when to flash.

Safety • 120VAC wiring must be performed by a qualified/licensed electrician per local code and University EHS policy. • Lock out/tag out the branch circuit breaker before making any 120V connections. • Confirm power is off with a meter before touching the Red/White/Green strobe leads or the wire-nut splices.

Hardware

•CyberData SIP Outdoor Intercom, P/N 011186 (with mounting back box)

•Hubbell/GAI-Tronics LED Strobe, Model 540-001 (constant-on / flashing tower light)

•Mounting hardware: 3/4" NPT conduit body or GAI-Tronics stanchion (Models 234/240/241), or Model 4115A wall bracket

•Wire nuts (3+) rated for the conductor gauge being spliced

•Copper grounding conductor and a #8 ring terminal (for the CyberData back box ground lug), plus star/serrated washers if bonding to painted metal

•16 AWG (or smaller per J10 spec) lead wire for the relay signal pair, if extending beyond the strobe's factory leads

Power

•Strobe (540-001): dedicated 120VAC @ 60Hz branch circuit, breaker-protected. Nominal draw 0.39A; inrush up to 50A on power-up, so avoid sharing a breaker with sensitive equipment.

•Intercom (011186): 802.3af-compliant PoE from a network switch or PoE injector. (An 8–12VDC @ 1A regulated supply on J10 pins 1–2 is available as an alternate, but PoE is used in this installation and is preferred.)

Tools

•Wire strippers, screwdriver set (for the 3.5mm pluggable terminal block at J10), voltage meter, label maker/wire labels, network cable tester.

The photos below show a completed installation at Moravian University and are referenced throughout the wiring steps.

Figure 1 — Overview of the junction box: PoE data cable (black) into the CyberData board, the low-voltage relay pair (orange/violet) routed to J10, and the 120V branch-circuit conductors (white/black/green) spliced with wire nuts to power the strobe. The blue "Dry Contact C" leads are spare/unused conductors left for a future door-contact sensor.

Figure 2 — Component side of the CyberData 011186 board, showing the orange and violet relay leads landed on the J10 pluggable terminal block, and the PoE Ethernet cable entering the RJ45 jack at lower left.

Figure 3 — Close-up of the J10 terminal block: the violet lead lands on Relay Common (Pin 3) and the orange lead lands on Relay N.O. (Pin 4). This is the only connection between the intercom and the strobe.

CyberData 011186 — J10 Terminal Block

J10 is an 8-position, 3.5mm pluggable terminal block on the CyberData board. It accepts up to 16 AWG wire with roughly 1/4" (6mm) of stripped lead.

Pin	J10 Label	Function	Used in this install?
1	+8–12VDC IN	Alternate (non-PoE) DC power input	No – unit is PoE powered
2	Power Ground	Ground return for Pin 1	No
3	Relay Common	Internal relay, common contact	Yes – Violet lead (strobe)
4	Relay N.O.	Internal relay, normally-open contact	Yes – Orange lead (strobe)
5	Sense Input	External dry-contact sense input (e.g., door contact)	No – spare, capped
6	Sense Ground	Ground return for Pin 5	No – spare, capped
7	Remote Switch A	External remote call-button input	No
8	Remote Switch B	External remote call-button input	No

 

Hubbell/GAI-Tronics 540-001 — Factory Leads

The strobe ships with seven 15-foot color-coded leads:

Lead Color	Function	Connects To	Circuit
Red	120 VAC line (hot)	Building 120V branch circuit – hot (via wire nut)	120V
White	120 VAC neutral	Building 120V branch circuit – neutral (via wire nut)	120V
Green	Earth ground	Building 120V branch circuit – ground (via wire nut)	120V
Violet (+)	Emergency/flash signal input	CyberData J10 Pin 3 – Relay Common	Low-voltage
Orange (–)	Emergency/flash signal input	CyberData J10 Pin 4 – Relay N.O.	Low-voltage
Blue / Black	Auxiliary dry-contact output (2A @ 120VAC)	Not used – cap and leave unused unless driving auxiliary equipment	N/A

The strobe and the intercom sit inches apart in the same enclosure but are grounded through two different systems — the strobe through its 120V branch circuit, the CyberData board through its metal back box. Bonding both to the same effective ground point is the best way to protect people and equipment and to keep a lightning or power surge on one circuit from riding into the other.

Strobe (540-001) — equipment ground

1.Connect the strobe's Green lead to a solid equipment ground — normally the bare/green equipment grounding conductor that runs with the 120V branch circuit back to the panel's ground bus.

2.If the strobe is mounted to a metal conduit body or GAI-Tronics stanchion that is part of a continuous, properly grounded metal raceway, that raceway can carry part of the grounding path — but the manual still requires the Green lead to be landed on a ground connection; don't omit it.

3.Land the ground connection on bare, unpainted metal. If bonding to a painted enclosure, use a star/serrated washer so the connection bites through the paint.

4.Never rely on the PoE Ethernet cable or the low-voltage Violet/Orange relay pair as a ground path for the strobe — they are signal conductors only.

CyberData 011186 — enclosure ground

5.The 011186 back box includes a ground lug sized for a #8 ring terminal, located on the back box near the board.

6.Terminate a copper grounding conductor with a ring terminal to that lug (size the conductor per local code/AHJ for the box).

7.Run this conductor to the same effective ground point used for the strobe's branch-circuit ground — the same panel ground bus, or a common bonding point/bus bar inside the same junction box — rather than to a separate, independent ground rod.

8.PoE supplies data and power to the board, but it does not ground the metal enclosure — the mechanical ground-lug connection above is still required.

Best practice — single-point ground • Bond both devices to one common ground point; avoid separate ground rods for the strobe and the intercom, which can leave the two enclosures at different potentials during a surge. • Because this is an exterior PoE run, add an in-line PoE surge/lightning protector on the Ethernet cable where it transitions from outdoors to indoors, especially on long or exposed runs. • If shielded (STP) Ethernet cable is used outdoors, ground the shield at one end only (the building/switch end) to avoid ground-loop currents on the data pairs. • All grounding and bonding must comply with NEC Article 250 and local code amendments — have a licensed electrician verify the ground bus/rod and conductor sizing.

1. Mount the hardware

1.Mount the CyberData 011186 back box and board at the call-station location per the intercom's installation manual.

2.Mount the 540-001 strobe using 3/4" NPT threads on the strobe base to a conduit body, a GAI-Tronics stanchion (Model 234, 240, or 241), or a Model 4115A wall-mount bracket.

2. Land the network / PoE connection

3.Run and terminate the Ethernet cable to the CyberData board's RJ45 jack (see Figure 2).

4.Connect the other end to an 802.3af-compliant PoE switch port or injector. Confirm the intercom's status LEDs indicate power and link.

5.The intercom is powered entirely by PoE in this installation — do not also land 120V or the 8–12VDC alternate supply on J10 pins 1–2.

6.Bond the back box to ground via its #8 ring-terminal ground lug — see “Grounding Both Devices” above. PoE does not ground the enclosure.

3. Wire the flash-trigger signal (intercom → strobe)

7.Identify the strobe's Violet (+) and Orange (–) emergency-signal leads.

8.Land the Violet lead on J10 Pin 3 (Relay Common).

9.Land the Orange lead on J10 Pin 4 (Relay N.O.).

10.Confirm the terminal screws are tight and the leads match Figures 2–3. This pair is a dry (unpowered) contact — no voltage is applied by the intercom until the relay closes during a call.

Note: Pins 3 and 4 can be swapped — it does not matter which of the Violet or Orange leads lands on which pin. J10's relay is a simple non-polarized dry contact (just a mechanical switch), so either arrangement closes the same loop and triggers the flash identically. Landing them as documented above simply keeps the wiring consistent with this guide and the reference photos for future troubleshooting.

4. Wire constant 120V power to the strobe

11.With the branch circuit breaker locked out, splice the building 120V hot conductor to the strobe's Red lead with a wire nut.

12.Splice the building neutral conductor to the strobe's White lead with a wire nut.

13.Splice the building ground conductor to the strobe's Green lead with a wire nut (see Figure 1). See “Grounding Both Devices” above for how this ground point should relate to the CyberData chassis ground.

14.Cap and tuck away the strobe's Blue and Black auxiliary dry-contact leads — they are not used unless the strobe is also driving a separate piece of auxiliary equipment.

15.Leave any spare/pre-labeled conductors in the box (for example, wires tagged "Dry Contact C") capped and unused; they are provisioned for a future door-contact sensor on J10 Pins 5–6, not for this strobe.

5. Configure the relay trigger in the intercom's web interface

16.Browse to the intercom's IP address and log in (factory default admin/admin — change this immediately if not already done).

17.Under the device's relay/trigger configuration, set the relay to activate for the duration of an active call (ring/call event), then save and reboot if prompted.

18.This is what makes the strobe flash only while a call is in progress; because the strobe already has continuous 120V power, it returns to steady constant-on as soon as the relay opens at the end of the call.

6. Test

19.Restore the 120V breaker and confirm the strobe lights immediately and stays lit steadily (constant-on).

20.Press the intercom's call button and confirm the strobe switches to a fast flash for the duration of the call.

21.End the call and confirm the strobe returns to steady constant-on illumination.

Note • The strobe's constant-on behavior is simply a function of it having continuous 120V power — there is no jumper or switch to set on the 540-001 for this mode. • Flashing is triggered only by a momentary signal on the Violet/Orange leads, which the CyberData relay provides while a call is active.

•Strobe never lights: check the branch-circuit breaker, verify 120V at the wire nuts with a meter, and re-check the Red/White/Green splices.

•Strobe lights but never flashes on a call: verify the Violet/Orange leads are landed on J10 Pins 3/4 (not swapped with the sense-input pins 5/6), confirm the terminal screws are tight, and confirm the relay trigger event is enabled in the intercom's web configuration.

•Intercom has no power/won't register on the network: confirm the switch port is 802.3af PoE-enabled, swap the patch cable, and check link/power LEDs on the board.

•Relay clicks but strobe flash is erratic: confirm the dry-contact load (strobe signal input) is within the relay's rating and that wiring runs are not excessively long for 16 AWG.

• Hubbell/GAI-Tronics 540-001 Strobe — Installation & Operation Manual (GTC 42004-499)

https://hubbellcdn.com/installationmanuals/GTC_42004-499_IOM_EN.pdf

• CyberData Outdoor Intercom (011186) — Quick Reference Placemat

https://files.cyberdata.net/assets/011186/011186_931541H_Outdoor_Intercom_Quick_Reference_Placemat.pdf

 

 

One-page summary of the complete wiring path, for use at the job site.

 

 

At a Glance

Wire	Signal	From	Lands On
Ethernet (Cat5e/6)	PoE data + power	PoE switch/injector	CyberData RJ45 jack
Violet	Flash trigger (+)	Strobe factory lead	J10 Pin 3 – Relay Common
Orange	Flash trigger (–)	Strobe factory lead	J10 Pin 4 – Relay N.O.
Black (bldg. hot)	120VAC hot	Branch circuit	Strobe Red lead (wire nut)
White (bldg. neutral)	120VAC neutral	Branch circuit	Strobe White lead (wire nut)
Green/teal (bldg. ground)	Ground	Branch circuit	Strobe Green lead (wire nut)
Ground conductor	Chassis bond	CyberData back box (#8 ring lug)	Same ground point as strobe

Note: J10 Pins 3 and 4 (Relay Common / Relay N.O.) can be swapped — it does not matter which of the Violet or Orange leads lands on which pin. The relay is a simple non-polarized dry contact, so either arrangement triggers the flash the same way.