B224RBA Plug-in Relay Detector Base
Installation and Maintenance Instructions
Manufacturer: System Sensor
Address: 6581 Kitimat Road, Unit 6, Mississauga, Ontario L5N-3T5
Contact: 1-800-SENSOR2, FAX: 905-812-0771
Website: www.systemsensor.ca
Specifications
| Specification | Value |
|---|---|
| Base Diameter | 6.85 in (17.4 cm) |
| Base Height (less sensor) | 1.61 in (4.1 cm) |
| Operating Temperature Range | 32° to 150°F (0° to 66°C) |
| Operating Humidity Range | 10% to 93% Relative Humidity (Non-condensing) |
| Operating Voltage | 15 to 32 VDC |
| Standby Current | 170 μA |
| Coil | 2 coil latching |
| Contact Type | Form C |
Contact Relay Ratings
| Current Rating | Maximum Voltage | Load Description | Application |
|---|---|---|---|
| 2 A | 25 VAC | (PF = 0.35) | Non-coded |
| 3 A | 30 VDC | Resistive | Non-coded |
| 2 A | 30 VDC | Resistive | Coded |
| 0.46 A | 30 VDC | (L/R = 20ms) | Non-coded |
| 0.7 A | 70.7 VAC | (PF = 0.35) | Non-coded |
| 0.9 A | 125 VDC | Resistive | Non-coded |
| 0.5 A | 125 VAC | PF = 0.75 | Non-coded |
| 0.3 A | 125 VAC | PF = 0.35 | Non-coded |
Timing Specifications
- Set Time (Position 1): 60 msec minimum, 100 msec maximum
- Set Time (Position 2): 6 seconds minimum, 10 seconds maximum
- Reset Time: 20 msec
Before Installing
Please read the System Smoke Detector Applications Guide for detailed information on detector spacing, placement, zoning, wiring, and special applications. Copies are available from System Sensor. Observe CAN/ULC S524 guidelines.
NOTICE: This manual should be left with the owner/user of this equipment.
IMPORTANT: Detectors used with these bases must be tested and maintained regularly following CAN/ULC S536 requirements. Clean detectors at least once a year.
General Information
The relay base is designed for intelligent systems, featuring Form C latching relay contacts for auxiliary function control. The relay offers two modes: short delay (60-100 msec activation time) and long delay (6-10 sec activation time). A shunt with pin headers on the base PC board selects the delay mode. The B224RB is factory-set to the short delay. To use the long delay, move the shunt to the adjacent pin headers (refer to Figures 2 and 6).
B224RBA Terminals
- NO (Normal Close): Terminal 1
- Common: Terminal 2
- Normal Open: Terminal 3
- Comm. Line In (-) and Out (-): Terminal 4
- Comm. Line In (+) and Out (+): Terminal 5
Mounting
Mount the mounting plate directly to an electrical box. The plate is compatible with 4-inch square (with/without plaster ring), 4-inch octagon, 3 1/2-inch octagon, single gang, and double gang junction boxes.
- Connect field wiring to terminals as shown in Figure 4.
- Attach the mounting plate to the junction box (see Figure 2).
- To mount the base, hook the tab on the base into the groove on the mounting plate.
- Swing the base into position to engage the product pins with the terminals on the mounting plate.
- Secure the base by tightening the mounting screws.
- Install a compatible smoke detector according to its installation manual.
Figure 1. Terminal Designation: Depicts a circular base with numbered terminals (1-5) arranged around the perimeter. Terminal 1 is labeled NC (Normal Close), 2 is Common, 3 is NO (Normal Open), and 4 & 5 are for communication lines.
Figure 2. Mounting the Base to an Electrical Box: Illustrates the process of attaching the base to a junction box. It shows the mounting plate, screws (not supplied), and the location of the relay activation shunt, indicating it can be moved to switch from short delay to long delay.
Installation Guidelines
All wiring must comply with applicable local codes and specific requirements of the local authority having jurisdiction, using proper wire sizes. Color-coded conductors for connecting smoke detectors to control panels and accessory devices are recommended to reduce wiring errors. Improper connections can hinder system response during a fire.
For signal wiring between interconnected detectors, use wire no smaller than 18 gauge (0.9 sq mm). Wire sizes up to 12 gauge (2.5 sq mm) are acceptable.
Consult control panel specifications for allowable loop resistance before wiring detector loops.
Wiring Instructions
WARNING: The base uses a latching relay that can change states due to mechanical shocks or jarring. While contacts are shipped open, they may close during transit. Connecting an auxiliary control circuit to closed relay contacts could cause unexpected or dangerous activation. Ensure relay contacts are open (by applying power to bases without sensor heads) before connecting auxiliary circuits.
To make wiring connections: strip approximately 3/8" (10 mm) of wire insulation, slide the wire under the clamping plate, and tighten the screw.
- Wire the normally open (NO) line to terminal 3.
- Wire the normally closed (NC) line to terminal 1.
- Wire the relay common line to terminal 2.
- Wire the communication lines in (-) and out (-) to terminal 4.
- Wire the communication lines in (+) and out (+) to terminal 5.
Check zone wiring for continuity, correct polarity, ground fault, and perform dielectric tests before installing detector heads.
A label on the base is for recording zone, address, and detector type, useful for setting detector addresses and verifying sensor types.
After all bases are wired, mounted, and loop wiring checked, install detector heads.
Tamper-Resist Feature: This feature prevents base removal without a tool. To activate, break the tab as shown in Figure 5A. To remove a detector with the feature activated, insert a small-bladed screwdriver into the slot from the top and press the lever down (Figure 5B), allowing counterclockwise rotation for removal. The feature can be defeated by removing the plastic lever, but it cannot be reactivated.
Figure 3: Shows two wiring configurations: 'THIS' (correct) and 'NOT THIS' (incorrect), illustrating proper and improper connections for the communication lines.
Figure 4. Wiring Diagram: Depicts the wiring connections for a listed compatible control panel to the base, including communication lines (Comm. (+) and Comm. (-)) and the SLC loop connections (SLC (+) and SLC (-)) to other intelligent devices. It also shows the relay terminals (1, 2, 3) and their functions (NC, Common, NO). It includes a note on Class A optional wiring.
Figure 5A. Activating the Tamper-Resist Feature: Illustrates breaking a tab at a dotted line by twisting towards the center of the base.
Figure 5B. Removing the Detector Head from the Base: Shows a slot on the base where a small-bladed screwdriver is inserted to push a plastic lever, allowing the detector to be rotated and removed.
Figure 6. Relay Activation Shunt: Shows the location of the shunt on the PC board and how moving it from the default 'SHORT DELAY' position to the adjacent pin headers switches the relay activation to 'LONG DELAY'.
Three-Year Limited Warranty
System Sensor warrants its smoke detector base against defects in materials and workmanship for three years from the manufacture date under normal use. System Sensor makes no other express warranty. No representative can alter this warranty. The Company's obligation is limited to replacing defective parts. To obtain service, call 800-SENSOR2 (736-7672) for a Return Authorization number. Send defective units postage prepaid to: System Sensor, Returns Department, RA #__________, 6581 Kitimat Road, Unit 6, Mississauga, Ontario L5N-3T5. Include a note describing the malfunction. The Company is not obligated to replace units damaged by misuse, modifications, or alterations. The Company is not liable for consequential or incidental damages, even if caused by negligence. Some states may not allow these limitations, so they may not apply to you. This warranty grants specific legal rights, and you may have other rights varying by state.
©2011 System Sensor
