Indicators - Honeywell SYA14 Series Manual

FF-SB Installation Manual

Indicators

FF-SB12, FF-SB14, FF-SB15 and FF-SB30 Series receivers have four LED indicators (see
figure 1-8). The emitters have one LED. These LED indicators provide important information
related to light curtain status.
Figure 1-8 Receiver Indicators
Signal Strength Indicator (receiver)
The R1 indicator will flash repeatedly if the received light level is lower than the normal
operating level, but is still sufficient for operation. If the received light level drops too low, an
alarm state results and the light curtain generates a stop signal. To prevent unnecessary
shutdowns, this indicator will signal the need for cleaning and/or alignment.
Operation Indicators (receiver)
There are two LED indicators that provide operation status (see figure 1-8): R2 (red) and R3
(green). R3 indicates the receiver is operating normally and the sensing field is clear. This
indicator must be on to ensure the equipment is working properly (red R2 will be off).
R2 indicates that the light curtain is in an alarm state. If the sensing field is interrupted, the
FF-SB Series light curtain will immediately generate a stop signal. In this condition, R2 will be
on and R3 will be off.
Test Indicator (receiver)
FF-SB Series light curtains provide a connection for testing the state of external contacts. The
test contacts allow verification of external safety-related electromechanical components.
When any contact in the external test circuit opens, the FF-SB Series light curtains will switch
to the alarm state. R4, the test indicator, will turn on and the relay outputs will be de-energized
while the test circuit is open.
The customer is responsible for providing the external test circuitry. See figures 3-3, 3-4 and
3-5 for the wiring diagrams of the external test circuitry.
For application help: call 1-800-537-6945
Honeywell • MICRO SWITCH Sensing and Control 19