GREENHECK FSKN Bacnet Test Module Instruction Manual
- June 1, 2024
- GREENHECK
Table of Contents
GREENHECK FSKN Bacnet Test Module
Specifications
- Product Name: FSKN BACNet Test Module
- Interface: BACnet or Modbus control system
- Purpose: Test actuated life safety damper per code requirements
- Safety Functions: None
- Compatibility: Designed for testing spring return containment dampers
Installation
Mounting
Surface mount the FSKNxx-BAC using the 4 holes on the base of the enclosure.
Do not drill inside the enclosure. Mark holes, drill, and then mount the
enclosure. Use bolts with lock washers inside damper sleeve or on any
vibrating surface like ductwork.
Wiring Diagrams
Network Wiring Connections:
The wiring of the line for BACnet MS/TP or Modbus RTU must be carried out
in accordance with applicable RS 485 standards. Set dipswitch 5 [Term] of last
FSKN to ON to enable EOL 150 resistor.
BACnet Dip Switch Settings:
Refer to the provided table for dip switch settings based on baudrate,
parity, and termination requirements.
Communication Status:
- Yellow flickering LED indicates communications established
- To reset error message, press reset button for longer than one second
- To perform a manual test, press and hold button until actuator springs closed
LED Status Signalization:
| Color | Status | Meaning |
|---|---|---|
| Green | On/Blinking | Upper limit switch (damper open) – Damper opens (motor |
isactuated)
Yellow| On/Blinking| Lower limit switch (damper closed) – Damper closes (motor
isnot actuated)
Red| Flashing| External fault = smoke detector triggered, nominal position
notreached.
Basic Wiring
Provide disconnect and L1 N overload as required by local and national codes.
FAQ
Q: Can the FSKN be used in smoke control systems?
A: No, the FSKN should not be used in smoke control systems for any
safety function.
Q: What are the recommended network wiring configurations?
A: For a mix of 2-wire and 3-wire devices, refer to the ASHRAE BACnet
Standard or Modbus controller installation instructions for wiring and
grounding information.
The FSKN is an interface between a BACnet or Modbus control system and an actuated life safety damper. It’s purpose is to test the damper per code requirements. It has no safety functions. It is a testing module.
Important!
The FSKN is not to be used in smoke control systems for any safety function.
It is not UL 864 UUKL listed. It is an interface for testing spring return
containment dampers per Chapter 7 of the IBC (International Building Code) and
IFC (International Fire Code) only. Use the FSKN with spring return closed
dampers only.
Installation
The enclosure is a standard NEMA 1 electrical box. It is surface mounted
remotely or on the damper sleeve. If mounted on the damper sleeve the
connected ducts must be free to fall away if necessary. Do not bridge the
sleeve and duct. Four mounting holes are inside the enclosure.
Ground all conduits entering the box per NFPA 70 NEC and local codes. The life
safety code requires flex or hard conduit for both 24V and 120V circuits. The
life safety code requires flex or hard conduit for both 24V and 120V circuits.
Only the 120V model requires a grounding screw connection.
Run the BACnet RS485 cable through an approved squeeze connector. The shields
are to be grounded at one location only, typically at the originating
controller. See the BACnet standard for RS485 wiring options.
Mounting
Surface mount the FSKNxx-BAC using the 4 holes on the base of the enclosure. Do not drill inside of enclosure. Mark holes, drill, and then mount the enclosure. Use bolts with lock washers inside damper sleeve or on any vibrating surface like ductwork.
The enclosure has a standard screw cover, cULus 6 in. x 6 in. x 3 in. ANSI 61 polyester finish.
Wiring Diagrams
Network wiring connections
The wiring of the line for BACnet MS/TP or Modbus RTU must be carried out in
accordance with applicable RS 485 standards.
(1) Set dipswitch 5 [Term] of last FSKN to ON to enable EOL 150Ω resistior.
If connected to a network with a mix of 2-wire (non-isolated) and 3-wire (isolated) devices, refer to the ASHRAE BACnet Standard or Modbus controller installation instructions for wiring and grounding information.
3-wire networks are recommended to avoid problems
BACnet Dip Switch Settings
For Modbus dipswitch settings see FSKN 120 & FSKN24 BACnet and Modbus information at www.belimo.us/firesmoke/FSKN.
On the end of line FSKN Dipswitch 5, Term, is set to ON while others are always set to OFF.
FSKN120-BAC
Communication status
Yellow flickering = communications established
Reset button
Press the button for longer than one second to reset an error message. Press
and hold button until actuator springs closed to perform a manual test.
LEDs status signalisation Belimo damper actuator
| Color | On/Blinking | Meaning |
|---|---|---|
| Green | On | Upper limit switch (damper open) |
| Blinking | Damper opens (motor is actuated) | |
| Yellow | On | Lower limit switch (damper closed) |
| Blinking | Damper closes (motor is not actuated) |
Red
| On| Internal device fault (BKN)
Blinking
| External fault = smoke detector triggered, nominal position not reached.
Flashing
| External fault = If an error is stored (i.e. no longer pending, but not yet acknowledged), then this is displayed on the deveice by a periodic flash of the red LED
Blinking = 1⁄2 second on, 1⁄2 second off
Flashing = 1⁄4 second on, 1⁄2 second off
Basic FSKN120-BAC wiring
FSKN24-BAC
Communication status
Yellow flickering = communications established
Reset button
Press the button for longer than one second to reset an error message. Press
and hold button until actuator springs closed to perform a manual test.
LEDs status signalisation Belimo damper actuator
| Color | On/Blinking | Meaning |
|---|
Green
| On| Damper is in the open position
Blinking| Damper is opening
Off| Damper blade is between open and close
Yellow
| On| Damper is in closed position
Blinking| Damper is closing
Off| Damper blade is between close and open
Red
| On| Internal device fault (BKN)
Blinking
| External fault = smoke detector triggered, nominal position not reached.
Flashing
| External fault = If an error is stored (i.e. no longer pending, but not yet acknowledged), then this is displayed on the deveice by a periodic flash of the red LED
Blinking = 1⁄2 second on, 1⁄2 second off
Flashing = 1⁄4 second on, 1⁄2 second off
Basic FSKN24-BAC wiring
Initial Start-Up
Token passing by devices on a MSTP network is specified in the BACnet
standard. The status indication LEDs are illuminated as soon as power is
applied. The FSKN activates the test sequence with the first power on and
expects input on the switch terminals, Closed or open in correct sequence. If
nothing is connected to a switch terminal, an error will occur with associated
blinking patterns. The error message can be removed by connecting the switch
wires and then pressing the Test button or using the Command MV120 4 Reset
command.
The green LED blinks when power is applied and the actuator is driving open.
The green LED is on continuously after the S2 switch makes.
A blinking red LED indicates a failure.
A blinking yellow LED is a transition indication.
Normal Operation
The FSKN relay is closed and the smoke detector and “primary heat responsive
device,” manual reset high temperature limit, operate normally.
During normal operation if a test command is issued to an FSKN:
- The FSKN relay is energized which opens its NC contacts and power is removed from the actuator which then springs the damper closed.
- The position switch (FSKN terminals S1 & S2, wires S1 & S2 on the actuator) makes (closes) indicating the damper is closed. Damper blade switches may also be employed.
- After 80 seconds the FSKN relay is de-energized which again powers the actuator and drives the damper open. The switch between terminals S1 & S2 opens. The yellow and green LEDs blink until the damper is reopened fully.
- When the actuator has driven the damper open either the actuator open switch (wires S4 & S6) or the damper blade open switch again makes and the test is complete.
- The FSKN then indicates no failure and the information is available to the BACnet controller.
- If the sequence is incorrect (either the closed switch or the open switch not making or breaking in correct sequence then a Failure message is recorded.
- Both the Red and Green LEDS will flash while the actuator is opening.
- After correcting any problem either pressing the Test switch on the FSKN or entering MV120 4 Reset command will change the FSKN Actuator status to normal.
Wiring Diagrams: FSKN120-BAC
Wiring Diagrams: FSKN24-BAC
Links to wiring diagrams with smoke detector
486250 FSKN Wiring Diagrams, Rev. 1, May 2023 (greenheck.com)
Reference links to Belimo
belimo_FSKN_installation-instructions.pdf
Belmo_FSKN_Application-Guide_en-us.pdf (belimo.com)
belimo_FSKN120_FSKN24_BACnet_Modbus_guide_en- us.pdf
Our Commitment
As a result of our commitment to continuous improvement, Greenheck reserves
the right to change specifications without notice.
Product warranties can be found online at Greenheck.com, either on the
specific product page or in the literature section of the website at
Greenheck.com/Resources/Library/Literature.
Phone: 715.359.6171
Fax: 715.355.2399
Parts: 800.355.5354
E-mail: gfcinfo@greenheck.com
Website: www.greenheck.com
486240 • FSKN, Rev. 1, May 2023 Copyright 2023 © Greenheck Fan Corporation
References
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