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10. Dry Contact Relay Alarm
A terminal block connector on the rear panel (labeled "ALARM")
provides for the dry contact relay alarm (see Figure 2). Normally
in the OPEN position, any loss of optical signal will trigger an
alarm condition and force the switch to the CLOSED position.
This relay can be used in conjunction with an external device to
monitor the condition of the fiber optic links.
11. Electrical Specifications
Data Rates:
1000Mbps
Connector:
RJ-45 Female
12. Temperature
Operating .............................................................................................................................. 0
.......................................................................................................... Hi-Temp (Optional) -20
Humidity ................................................................................................................ 95% non-condensing
13. Physical Characteristics
Height:
1.4" (3.5 cm)
Width:
7.1" (18 cm)
14. Troubleshooting
After installation is complete, only the "PWRA," and/or "PWRB," "Vcc," "LNK," "FO," "1000M," and "FDX"
LEDs should be lit. If not, please check the following:
Power Problem:
No LEDs are lit:
A. "PWRA" and/or "PWRB" LEDs should be on when power is connected. If both are "Off," then no DC
power is reaching the unit. Check the power supply, source, and polarity.
B. If "PWRA," and/or "PWRB," "Vcc," or "1000M" LEDs are "On" but all other LEDs are "Off", and the
Alarm switch is not closed, it indicates an internal problem with the unit. For assistance, please contact
the Technical Support Department at TC Communications @ (949) 852-1973.
Electrical Problem:
If the LNK or FDX LEDs are Off:
It means that there is no Ethernet electrical signal detected by the TC3301. Check the electrical
connections on the Cat 5E or 6 cable. Make sure that there's Ethernet signal being provided and that the
signal is 1000M. Also, check that the Ethernet cable is good.
Optical Problem:
The "FO" LED should be lit at all times to indicate good optic transmit and receive conditions and good cable
connections.
If the FO LED is OFF:
A. Optic power received by "Rx" is lower than the typical sensitivity.
B. Optic "Tx" is connected to another TC3301's "Tx." Check the optic cable connection; the local unit's optic
"Tx" should be connected to the remote unit's optic "Rx."
C. Optic cable type is incorrect. Typically, fiber optic cable with yellow-colored insulation is designated for
Single Mode use @8.2µm or 9µm; orange or gray-colored cable is for Multimode use @50µm or 62µm.
If the wrong cable type is used, the unit will not function properly.
Depth:
6.5" (16.5 cm)
Weight:
1.1 lbs. (501 gm)
-7-
TC3301 User's Manual
Dry Contact Relay
To remote alarm status indicator
Alarm Switch
Reply switch specifications
Max switch voltage: 100VDC
Switch current: 0.5Amp
Max carry current: 1.2Amp
Contact resistance: 0.2 Ohm
Rev. 1.4
C to 50
C
o
o
C to 70
C
o
o
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