TCS2-Motherboard

The TCS2 motherboard is the main circuit board that holds the Relay, Logic, Input, and Conveyor cards. It also includes several important power connectors and ports. 

Pictures

Connectors & indicators

The TCS2 Motherboard has the following connections and indicators:

1.          Input Source Power Connector: Provides 24VAC reference for the Input Card inputs.

2.        Enclosure fan connector: Provides 12VDC, ground, PWM output, and tachometer input.

3.        Ethernet switch power connector: Provides power to the TCS2 Ethernet switch.

4.       Ethernet port: Provides an Ethernet connection to the TCS2 Ethernet switch.

5.        Serial Interface Board power connector: Provides 5VDC, 12VDC, 24VDC, and ground to the Serial Interface board.

6.        PC Power connector: Provides 12VDC power to the TunnelWatch Panel PC or TunnelWatch PC with no display.

7.        Display power connector: Provides 12VDC power to a display in the display-only configuration.

8.        Main power connector: Connects to power distribution board and carries the following:

a.        Main 12VDC

b.       TunnelWatch KPT 12VDC

c.        5VDC

d.       VPD sensor 24VDC

e.        24VAC

f.          24VAC Neutral

g.       Ground

h.        Door switch signal

Replacing

1.          Turn the TCS2 main power switch off.

2.        Pull the Logic card, Input card, Conveyor card, and all Relay cards out of the Motherboard and set aside.

3.        Disconnect all the power and signal wires from the top of the Motherboard, including the TB2 24VAC power connector on the top left corner of the Motherboard.

4.       Disconnect all the field wiring connectors from the left and right sides of the Motherboard.

5.        Use a #2 Phillips screwdriver to remove the 12 screws securing the Motherboard to the enclosure.

6.        Pull the old Motherboard out of the TCS2.

7.        Put the new Motherboard in the same place the old Motherboard was mounted.

8.        Secure the motherboard to the TCS2 enclosure back wall using the 12 Phillips screws that were removed earlier.

9.        Reconnect all field wiring connectors to the left and right side of the Motherboard.

10.     Reconnect all power and signal wires to the top of the motherboard, including the TB2 24VAC power connector on the top left corner of the Motherboard.

11.        Reinstall the Logic card, Input card, Conveyor card, and all Relay cards back into the Motherboard.

Troubleshooting

1.          Tunnel device is not turning on.

a.        Locate the relay that controls the device that's not turning on.

b.       If the relay won't turn on through the software, make sure the override switch is set to AUTO. If it's set to OFF, the software can't turn on the relay.

c.        Turn the tunnel device on using the relay override switch.

i.           WARNING: Make sure the area around the tunnel device is clear before forcing device on.

ii.         Set the Relay card override switch to the ON position to force the relay on.

iii.       If the tunnel device turns on, then the problem is with the software setup.

iv.      If the tunnel device does not turn on, check the Relay card fuse for that relay. If the fuse is good, then the problem is with the tunnel device.

2.        Inputs are not turning on.

a.        Verify the Input source power connector TB2 located on the top left corner on the Motherboard is configured properly.

i.           When using the 24VAC source power from the TCS2 internal transformer:

●          There should be a single jumper from the 24V terminal to SRC terminal.

ii.         When using a site-supplied power source for the inputs:

●          The jumper should be removed from the TB2 connector.

●          The (+) of the power source should be connected to the SRC terminal on the TB2 connector.

●          The (-) of the power source should be connected to the COM terminal on TB2 connector.