UL924 Emergency Bypass
Project
Part Number
Ref.
Data Sheet : Catalog Page 78
Overview
UL924 Emergency Bypass is an option for Retrofit Interior (RI) and Relay
Panel (RP) which provides energy management control of emergency
lighting circuits during normal operation while maintaining emergency
function during power loss. UL924 monitors normal power for drop-out.
When drop-out occurs UL924 forces its relays On. Once the emergency
transfer switch and generator supply backup power, the emergency lighting
comes to life immediately. The UL924 option includes Relay Voltage Dividers
(RVD) for separated normal and emergency circuits as well as provisions for
user installed indicator lamp.
Features
Provides energy management control and emergency function
Availability
RI16, 32, and 48
RP16, 32, 48, and 64
16 Relay capacity
Normal and emergency voltage separation
Sequence of Operations
1. Emergency circuits are controlled from the optional UL924 Emergency
Bypass. The UL924 configuration jumper is set for “Emergency action
Close all relays”.
2. Power loss is detected by the UL924.
3. All relays connected to the UL924 are forced ON. UL924 capacitors
power emergency relay function. No external power source or input is
required for UL924 operation.
4. Relays not connected to the UL924 remain in their present state (On/
Off). Lighting Tough Relays (LTR) are mechanical latching type.
5. Generator transfer switch (not located in the RI/RP) reacts and allows
generator to feed dedicated emergency circuits previously fed by
normal (utility) power. The relays connected to the UL924 are already
ON, so the only possible source of delay in emergency lighting is the
generator or emergency transfer switch.
6. Dedicated emergency lighting circuits will remain On while emergency
power source is applied.
7. Normal power is restored and the emergency transfer switch returns
all circuits to normal power.
8. Relays connected to the UL924 will remain On during and after
normal power restoration.
9. Relays not connected to the UL924 remain in their present state (On/
Off).
10. RI/RP resumes normal control of Relays and returns lighting to the
correct level.
General Specifications
Construction: Printed Circuit Board
Dimensions: 8.31”(211mm)H x 3.69”(94mm)W x 0.75”(19mm)D
Weight: 6oz (177g)
Mounting: Factory mounted in place of standard relay interface board
Operating Environment: 32-125°F (0-50°C), 20-95%RH, non-condensing
Certifications
Maintains RI/RP UL Listing and all certifications
Warranty
Maintains RI/RP warranty
UL924 Specifications
Power In: 24VAC +/-10%, 30VA, 50-60 Hz (factory wired for normal power)
Auxiliary Out: 24VDC for normal power indicator lamp (user installed option)
Please note 200mA total is available from the Controller Board for Universal
Inputs (UI), the Satellite / Station Network, and the UL924 Auxiliary Out.
Relay Capacity: 16 LTR
Configuration Jumper: 3 Pin Jumper Terminal
No Jumper = Emergency action Disabled
1-2 Jumped = Emergency action Close all relays
2-3 Jumped = Emergency action Open all relays
Test Jumper: 2 Position Jumper Terminal
No Jumper = Simulated power loss
Applicable Platform Specifications
RI/RP16: UL924 Controls LTR 1-16
RI/RP32: UL924 Controls LTR 17-32
RI/RP48: UL924 Controls LTR 33-48
RP64: UL924 Controls LTR 49-64
LTR connected to UL924 are dedicated to emergency circuits. However,
the remaining RI/RP components require normal (utility) power to function.
DO NOT supply the RI/RP transformer with emergency power.
BAS Router
Field Devices
Field Devices
Field Devices
Field Devices
Satellite/Station Network
Satellite/Station Network
Satellite/Station Network
Satellite/Station Network
Retrofit Interior (RI)
Relay Panel (RP)
Zone Control (ZC)
Satellite/Station Network
Retrofit Kit (RK)
Field Devices
UL924 Emergency Bypass
ControllerField
Board
Terminations (ZC) Satellite
Devices
www.BRTint.com : 800-241-9173 Blue Ridge Technologies®
Board Terminations
(RI / RK / RP)
LS
LVS Controller
CTS
OCC
© 2014 Blue Ridge Technologies International, LLC All Rights Reserved. UL924-DS-V14.05
CTS (Capacitive Touch Station)
LVS (Low Voltage Switch) / OCC (Occupancy Sensor) / LS (Light Sensor)
General Architecture
Standard-A USB Plug
Micro-B USB Plug
Internet
IP
Bluetooth Module
Field Devices
Field Devices
Field Devices
Field Devices
Satellite/Station Network
Satellite/Station Network
Satellite/Station Network
J3
Zone Control (ZC)
Field Devices
Micro-B USB Plug
Field Devices
Standard-A USB Plug
LVS
CTS
Satellite
Retrofit Kit (RK)
Retrofit Interior (RI)
Relay Panel (RP)
J5
Satellite/Station Network
Bluetooth
Bluetooth Module
BACnet MS/TP
BAS Router
Satellite/Station Network
J1
Data Sheet : Catalog Page 79
OCC
LS
LVS (Low Voltage Switch) / OCC (Occupancy Sensor) / LS (Light Sensor)
CTS (Capacitive Touch Station)
UL924 Terminations
Emergency Bypass Structure
Generator
Emergency
Transfer Switch
Emergency Power
Distribution Panel
G
Normal (Utility) Power
Retrofit Interior (RI) / Relay Panel (RP)
Lighting Tough Relay
(LTR)
UL924
Lighting Load
TEST
JP2
1
2
3
24VAC
24VDC OUT
Factory Wired for Normal Power
24VDC(+) Normal Power Indicator Lamp*
24VDC(-) Normal Power Indicator Lamp*
LED 1
*User installed option.
LTR Terminations
Power LED
RI / RP Transformer
LEXP Terminations
Phillips / Slot / Square Head Screw Terminals
GND
DI 24
DI 23
DI 22
DI 21
DI 20
DI 19
DI 18
DI 17
JP1
Configuration
Jumper
GND
DI 32
DI 31
DI 30
DI 29
DI 28
DI 27
DI 26
DI 25
Test Jumper
INPUTS 17-32
J9
POWER
Wire Strip Length Indicator
J13
Manual Override Lever
TO J26 OF Controller
Relay Output
R N
Ordering Information
Line In
See RI/RP Data Sheet for ordering information.
N R
INPUTS 1
J4
J5
J18 J19
B
D
A
C
ADDRES
ress Controller Board
Port
per
Mounting Hole
DI Jumper
17-24*
DI Jumper
25-32*
Power LED
DI Jumper
1-8*
DI Jumper
Normal Power
Distribution Panel