INSTALLATION
Page 16 of 36
NOTE: The Digital lnputs are optically isolated and thus the Digital Input
Common point is separate to 0V. These can be commoned by setting DIP
Switch SW3-1 on or by adding an external jumper.
Note *3
1
2
+24V
+24V
+24V
+24V
DI 0
DI 1
DI 2
DI 3
COM
0V
SW-3
1
2
AI
Figure 2.14
–
Digital Input Wiring Example
2.4.2.
D
IGITAL
O
UTPUTS
There are five digital outputs of which three are used to control the BSR components
(Indication
LED’s and Sensor Trigger). The remaining two relays (D03 & D04) are solid
state, normally open, single pole, connected with a single common as shown in figure
2.9 below. These are used for hardwired interfacing to the PLC or remote control
circuit.
Digital Input
Description
DO 0
Output for control of 24V SENSOR HEALTHY LED (Green). This LED is on
when a healthy beam signal is received by the receiver sensor. It indicates that
there is a clear path between emitter and receiver sensors.
DO 1
Output for control of 24V TRIP/FAULT LED (Red). This LED is on when a Trip
signal has been received (Sensor beam broken), the reset button has been
retained in the On position, or when an internal unit fault has been diagnosed.
Once triggered, it will remain on until the unit is reset locally or via
communications.
DO 2
Output for testing sensor operation. This output is used to trigger the emitter
sensor.
DO 3
TRIP Output to PLC. Operates when beam has been broken
– belt rip detected.
This is a latched output and is reset via Reset pushbutton or via communication.
Used to trip conveyor belt
. Contact can be selected a N/O or N/C via DIP
switches in Section 2.6.2
DO 4
FAULT Output to PLC. Operates for device fault (unit fault) or when reset
pushbutton is retained (forced in reset position). Output latches and is reset via
pushbutton or via communication. Contact can be selected a N/O or N/C via
DIP switches in Section 2.6.2
Table 2.2
–
Digital Output Description
