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Replacing the Craft Interface

The craft interface is located above the card cage, as shown in Figure 1. It houses the alarm relay interface ports and indicates status of services gateway components.

The craft interface is hot-insertable and hot-removable. It weighs approximately 1.1 lb (0.50 kg). When you install the craft interface, allow several minutes for the display to reflect the current state of the device.

To replace the craft interface, use the following procedures:

Removing the Craft Interface

To remove the craft interface (see Figure 41):

  1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist and connect the strap to one of the ESD points on the chassis. For more information about ESD, see Preventing Electrostatic Discharge Damage.
  2. Detach any external devices connected to the craft interface.
  3. Loosen the captive screws at the top left and right corners of the craft interface faceplate.
  4. Grasp the craft interface faceplate and carefully tilt it toward you until it is horizontal.
  5. Disconnect the ribbon cable from the back of the faceplate by gently pressing on both sides of the latch with your thumb and forefinger. Remove the craft interface from the chassis.

Figure 41: Removing the Craft Interface

Image g030241.gif

Installing the Craft Interface

To install the craft interface (see Figure 42):

  1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist and connect the strap to one of the ESD points on the chassis. For more information about ESD, see Preventing Electrostatic Discharge Damage.
  2. Grasp the craft interface with one hand and hold the bottom edge of the craft interface with the other hand to support its weight.
  3. Orient the ribbon cable so that it plugs into the connector socket. The connector is keyed and can be inserted only one way.
  4. Align the bottom of the craft interface with the sheet metal above the card cage and press it into place.
  5. Tighten the screws on the left and right corners of the craft interface faceplate.
  6. Reattach any external devices connected to the craft interface.

Figure 42: Installing a Craft Interface

Image g030255.gif

Replacing Alarm Relay Wires

The alarm relay wires connect external alarm-reporting devices to the RED and YELLOW relay contacts on the craft interface.

The terminal blocks that plug into the alarm relay contacts are supplied with the services gateway. The terminal blocks accept wire of any gauge between 28-AWG and 14-AWG (0.08 and 2.08 mm2). Use the wire gauge appropriate for the external device you are connecting.

Figure 43: Alarm Relay Contacts

Image g004219.gif

Disconnecting the Alarm Relay Wires

To disconnect the alarm relay wires from the services gateway and an alarm-reporting device (see Figure 43):

  1. Disconnect the existing wire at the external device.
  2. Using a 2.5-mm flat-blade screwdriver, loosen the small screws on the face of the terminal block and remove the block from the relay contact.
  3. Using the 2.5-mm flat-blade screwdriver, loosen the small screws on the side of the terminal block. Remove existing wires from the slots in the front of the block.

Connecting the Alarm Relay Wires

To connect the alarm relay wires between a services gateway and an alarm-reporting device (see Figure 43):

  1. Prepare the required length of replacement wire with gauge between 28-AWG and 14-AWG (0.08 and 2.08 mm2).
  2. Insert the replacement wires into the slots in the front of the block. Use a 2.5-mm flat-blade screwdriver to tighten the screws and secure the wire.
  3. Plug the terminal block into the relay contact, and use a 2.5-mm flat-blade screwdriver to tighten the screws on the face of the block.
  4. Attach the other end of the wires to the external device.

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