Multi-Tech Systems 7500 - Manual (Page 177)

ION 7500 / ION 7600 User’s Guide Communications Card
Chapter 6 - Hardware Reference Page 177
Communications Card
Installation Instructions
D ANGER
The components inside the meter are extremely sensitive to electrostatic discharge. To prevent damage
to the unit, wear an anti-static wrist strap at all times when working inside the unit. Failure to use proper
equipment during servicing will void the meter’s warranty.
The following steps should be taken before inserting a Comm Card into the
meter:
1. Turn off all power to the meter.
2. Open all PT fuses (or direct voltage input fuses). Close all CT shorting blocks.
3. Disconnect the Line and Neutral (or DC power) wires from the Control Power
inputs of the unit.
4. Disconnect all other wiring (or power off all other circuits) which may present
potentially hazardous voltage levels to the unit, such as connections to the relay
outputs, status inputs, etc.
5. Ensure that all cables still connected to the meter are NOT live.
Removing the Existing Communications Card
The meter’s Comm Card can be removed while the unit is still mounted in its
switchgear panel (or other mounting location).
1. Remove the two screws and lockwashers on the Comm Card’s backplate (refer
to the diagram).
2. Remove the nut from the chassis ground lug.
3. Grasp the Comm Card by the sides of its backplate and pull it out of the socket,
away from the chassis.
4. Place the Comm Card in an anti-static wrapping.
Installing the New Card
The Comm Card consists of a circuit board with an attached polarized CHAMP
connector on the component side. Install the communications card as follows:
1. Hold the communications card by the sides and slide it into the base unit with
the component side facing up.
2. Slide the edge of the circuit board down the slots along each side of the chassis.
3. Align the CHAMP connector with the socket and press the Comm Card firmly
into place. The socket and the connector are polarized, so the pins in the
connector will not fit into the socket if the card is not oriented correctly. The
communications card is securely inserted into the socket when the backplate of
the Comm Card meets the chassis of the meter.