Olson Technology OTEB-CW-B - Manual (Page 18)

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Rear Panel of the Unit
1. Case grounding points.
2. Expansion panel for future use.
3. Removable power supply card with thumb screws
4. Power supply card status LED
a. GREEN LED indicates normal operation.
b. No illumination of LED indicates power failure.
5. Fuse holders
6. Fan shroud with securing screws
7. Fans (air flow through front of unit and out through fans at rear of unit)
8. RJ45 socket with alarm relay connections.
9. Electrical signaling terminal strip
a. DET1, DET2, SIG1, SIG2 for future use
b. INT, INT are interlock terminals. They should be electrically shorted to-
gether to enable operation of the unit. They may be wired to an external
interlock switch if required.
10. External power supply terminal strip
a. RTN (A), -48V (A), RTN (B), -48V (B) for redundant external -48V return
and supply.