Series	Security Force I - SF1	Security Force II - SF2	Security Force III - SF3	Security Force IV - SF4	Security Force V - SF5
Illustration
Rating	NEMA #4 IP-65	NEMA #4 IP-65	NEMA #4 IP-65	NEMA #4 IP-65	NEMA #4 IP-65
Array Cross Section	1.25" x 1.55" (32 x 39 mm)	1.25" x 1.55" (32 x 39 mm)	1.75" x 4.5" (45 x 115 mm)	1.75" x 4.5" (45 x 115 mm)	1.25" x 1.55" (32 x 39 mm)
Array Lenths	4" - 31½" 32" (100-800mm)	4" - 63 " 64" (100-1600mm)	4" - 63 " 64" (100-1600mm)	12" - 72" (304-1828mm)	8", 16", 24" (203, 406, 610 mm)
Response Time	18 mS	18 mS	18 mS	18 mS	18mS
Lens Centers	.5 " (12.7 mm)	1.0" (25.4 mm)	1.0" (25.4 mm)	3.0" (76 mm)	.5", 1" (12.7 mm, 25.4 mm)
Spanning Range	0-20 ft (0-6 m)	0-20 ft (0-6 m)	1-120 ft (0-37 m)	0-120 ft (0-37 m)	0-120 ft (0-37 m)
Object Size Sensitivity	.6" (15 mm)	1.18" (30 mm)	1.18" (30 mm)	4" (100 mm)	1.18" (30 mm)
Detection

The Security Force detection zone is made up of a plurality of LED light  sources/photodetector pairs which transmit harmless, invisible beams of infrared  light that create a flat, sharply defined plane of protection, allowing the  operator to work close to the machine without restricting motion or causing  visual distraction. Intrusion into the light plane actuates a stop motion signal  to the controlled machine. The high quality optical lens system creates this  flat wall of protection by collimating the light sources to an angle of  divergence of only 2º.
Allowing the operator to freely work in close  proximity to the point of operation increases productivity by eliminating wasted  motion. Plus, productivity is further enhanced by the increased speed in which  each operation is achieved through the elimination of processes associated with  the other safeguarding means, i.e. door opening and closing, palm button  depression, foot switch actuation, etc.
Operators welcome this form of  machine guarding due to their new found freedom plus their feeling of security,  however there is another hidden safety benefit derived through the use of light  curtains, which is ergonomic safety. Ergonomic problems associated with  repetitive motion, such as constantly lifting gates, opening doors, actuating  foot switches, etc. can sometimes be eliminated (consult your local  regulations).

Technology
 

These unique, patented light curtain systems "-Security Force-" are virtually  the first "Control Reliable" products of its kind. This is accomplished by the  introduction of "intelligence" into the system whereby an integral network of  communication paths between a "System Microcontroller" and an "Executive  Microcontroller" create a unified monitor scheme of the system and of each  other. This integrated self-monitoring scheme creates both active and passive  self checks of the entire light curtain system, wherein all circuitry, all  hardware, all relays and all sensing elements are verified for proper  functioning while at the same time the light curtain system is performing its  machine guarding function.
This is accomplished via the tremendously high  rates of speed in which the System Microcontroller and the Executive  Microcontroller operate. Data can be transmitted, received, processed, exchanged  and compared in such a short period of time that idle time is afforded to  perform these series of integral self checks without compromise to the systems  safety function.
 

Verifies for proper functioning while at the same time  performing its machine guarding  function.

Integrated Self  Check

The checks performed by the Security Force Light Curtain  System

• Hardware Mismatch Checks
• Relay Integrity Checks
• Internal Code Verification Checks
• Data Transmission and Processing Checks
• Complete System Integrity Checks
• Computer Operating Properly Checks
• Clock Monitor Checks
• Machine Primary Control Element Feedback Check
• Stopping Performance Monitor Feedback Check
• Secondary Switching Device Check

Features