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C656M-E (4/07) 11
6. Install the TXB-V translator board into the back box:
a. Open the hinged door to the back box. Push the tab lock towards the back box wall of the unit
and open the door (refer to Figure 7).
Figure 7. Spectra III/Spectra IV Back Box Interconnect Door
b. Check the wiring to the controller. Refer to the Spectra III/Spectra IV documentation and the
documentation supplied with your controller to make sure the wiring is correct.
Vicon Controller
Terminal Block J1
Spectra III/Spectra IV
Four-Wire Terminal Block
Pin 9 Response Out + TX+
Pin 8 Response Out - TX-
Pin 3 Command In + RX+
Pin 2 Command In - RX-