SS-L CS-2461 10/21/04

Page 2 of 4

Specifications

Operating voltage range

15 to 28 VDC.

Maximum standby current

230 µA @ 24 VDC (no communication).

Maximum average standby current

255 µA @ 24 VDC (one communica-

tion every 5 seconds with LED blink en-

abled).

Maximum alarm current

6.5 mA @ 24 VDC (LED “ON”).

Operating humidity range

10% to 93% Relative Humidity, non-

condensing.

Operating temperature range

0° to 49°C (32° to 120°F).

Dimensions

Height: 1.66 inches (42.16 mm) in-

stalled in SS-B6 base. Diameter: 6.1

inches (154.94 mm) installed in SS-B6

base; 4.1 inches (104.14 mm) installed

in B501 base. Weight: 3.6 oz. (102 g).

BASES AVAILABLE:

SS-B6: 6.1 inches (154.94 mm) diam-

eter.

B501: 4.1 inches (104.14 mm) diam-

eter.

B501BH: Sounder base assembly. In-

cludes B501 base.

B224RB Relay Base: Screw terminals:

Up to 14 AWG (2.00 mm²). Relay type:

Form-C. Rating: 2 A @ 30 VDC resis-

tive; 0.3 A @ 110 VDC inductive; 1.0 A

@ 30 VDC inductive. Dimensions: 6.2

in. (157.48 mm) x 1.2 in. (30.48 mm).

B224BI Isolator Base: Dimensions:

6.2 in. (157.48 mm) x 1.2 in. (30.48

mm). Maximum: 25 devices between

isolator bases.

Recommended Coverage Per Detector

In order to support sophisticated smoke/dust discrimination algorithms (cooperating

multi-detector), it is recommended that at least two SS-L detectors be installed in

each room or enclosed area.

Recommended coverage per detector is 400 square feet (37.16 square meters).

Ordering Information

SS-L

Mounts to one of the bases listed below.

BASES:

SS-B6

Standard U.S. low-profile base.

B501BH

Sounder base, includes B501 base.

B224RB

Intelligent relay base.

B224BI

Intelligent isolator base. Isolates SLC from loop shorts.

ACCESSORIES:

RA400Z

Remote LED annunciator. 3 - 32 VDC. Fits U.S. single-gang electrical

box.

MOD400R

Detector sensitivity test tool. Use with most analog or digital multimeters.

Satisfies requirement of NFPA72 for sensitivity testing.

M02-04-01

Test magnet.

M02-09-00

Test magnet with telescope stick.

Wiring Diagram (standard base)

SS-L Design

The SS-L incorporates an extremely bright laser diode and integral lens that focuses

the light beam to a very small volume near the receiving photo sensor. The light then

passes into a light trap and is absorbed. The photo sensor is activated by a scattering

of smoke particles in this small-volume light beam.

In a typical photoelectric detector, the light beam is very wide and can reflect off the

chamber walls into the photo sensor because dust accumulation changes the wall

color from flat black to gray. With the SS-L, the concentrated light beam does not

touch the walls, therefore it is much less susceptible to dust accumulation.

Smoke scatters light in all directions and, in a typical photoelectric detector, only a

small portion of that scattered light reaches the photo sensor itself. In the SS-L, a

special mirror reflects and concentrates most of the scattered light into the photo

sensor. See laser detail drawings on following page.

Compared to smoke, airborne dust particles are very large and very sparse. Since a)

they are in motion; b) the illuminated volume is very small; and c) the SS-L flashes the

laser only every few seconds; then the occasional dust particle cannot remain in the

light volume for more than one or two samples. This transient signal from dust is the

key to the dust discrimination.