Banner EZ-SCREEN­ Safety Light Curtain Systems - Manual (Page 6)

In typical operation, if any part of an operator’s body (or any opaque object) of more than a pre-determined cross section is detected, the
solid-state Output Signal Switching Device (OSSD) safety outputs will turn OFF. These safety outputs are connected to the guarded
machine’s Final Switching Devices (FSDs) that control the machine primary control elements (MPCEs), which immediately stop the mo-
tion of the guarded machine.
Both OSSD outputs must be connected to the machine control so that the machine’s safety-related control system interrupts the circuit or
power to the MPCEs (Machine Primary Control Elements), resulting in a non-hazardous condition. Each OSSD is capable of sourcing
0.5A at +24V dc.
The OSSD safety outputs are not capable of performing a “handshake” communication with the Muteable Safety Stop Interface (MSSI) or
Universal Safety Stop Interface (USSI) found on other Banner Engineering safety products.
EZ-SCREEN Type 2 is extensively FMEA (Failure Mode and Effects Analysis) tested to IEC 61496-1/-2 requirements. The design of the
EZ-SCREEN Type 2 has considered all single faults such that a loss of a critical safety function will result in a stop command and a
lockout condition. In the event of an accumulation of undetected faults, a remote external test (or check) is required to maintain the safety
function.
Electrical connections are made through M12 (or Euro-style) quick-
disconnects. An optional hookup that provides sensor interchange-
ability (or “swapability”) – the ability to install either sensor at either
QD connection – is possible. Using a parallel connection (color-for-
color), the emitter cable can be connected to the receiver cable,
providing the ability to swap the emitter and receiver position, simi-
lar to a popular feature of Banner MINI-SCREEN® safety light
screens. This hookup option provides advantages during installa-
tion, wiring, and troubleshooting.
All models require a supply voltage of +24V dc ±20%.
Quick-Disconnect
Cables
M12 QD
Fittings
Defined
Area
Emitter
Specified Test Piece
Synchronization
Beam
Receiver
Status
Indicators
Figure 1. Banner EZ-SCREEN Type 2: emitter, receiver, and
two interconnecting cables
EZ-SCREEN® Type 2 Light Screen Instruction Manual
6 www.bannerengineering.com - tel: 763-544-3164 122452 rev. B