Wavetronix SmartSensor Matrix (SS-225) - User Guide - Manual (Page 111)

110 APPENDIX
LED does not indicate data transmitted on the A or B ports.
˽ RD – Indicates when data is received over the T-bus or over the control bridge. This
LED does not indicate data received on the A or B ports.
Note
If the DC Surge OK LED is not on when the Click 222 is powered, call Wavetronix Tech-
nical Services for assistance.
The Click 222 provides the following three independent serial connections:
˽ Topmost jack: control bridge
˽ Middle jack: dedicated communications for sensor 2 detection calls
˽ Lowest jack: dedicated communications for sensor 1 detection calls
The control bridge enables a multi-drop shared communication bus between all sensors
connected to the backplate. This allows control of all SmartSensor Matrix sensors, rack
cards and other connected Click devices. The remaining two serial connection ports pro-
vide communications to only one sensor each, as outlined above.
On a four-sensor preassembled backplate (see Figure D.7):
˽ The sensor wired into the left-most terminal blocks will be connected to ports A and
C on the Click 222 on the left. Port A is for detection calls and port C is connected to
the control bridge.
˽ The sensor wired to the second set of terminal blocks will be wired to ports B and D
on the Click 222 on the left. Port B is for detection calls and port D is connected to the
control bridge.
˽ The sensor wired to the third set of terminal block from the left will be wired to ports
A and C on the Click 222 on the right.
˽ The sensor wired to the right-most terminal block will be wired to ports B and D on
the Click 222 on the right.