Battery Replacement - Siemens MJ-XL Installation And Operation Manual

Appendix J
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MJ-X Jumper Descriptions and Default Connections
Table J.1
Jumper Default Shunt
Location
J1 In
J9 In
J22 1-2
J23 1-2
The following jumpers are not installed:
Note:
J2 (factory use only)
JP9 (microprocessor reset for factory use).
J.2

Battery Replacement

This section provides instructions for replacing the MJ-X
battery. For more information about the battery, see MJ-X
Application Note AN-10: Replacing the MJ-X battery.
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Note: Replace the MJ-X
an active "Low Battery" alert to avoid data loss.
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To replace the MJ-X battery, you will:
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1. Remove the MJ-X rear cover,
2. Remove and replace the coin-cell battery.
3. Close up the unit and reconnecting power.
Replacement Battery
Radio Shack carries replacement batteries for the MJ-X
The battery is a coin-cell type Lithium cell, Panasonic
BR2032 or equivalent.
Replacement Procedure
During the following procedure, use proper Electro-Static
Discharge (ESD) precautions. If possible, use an ESD wrist
strap. If no wrist strap is available, touch a grounded sur-
face before beginning. (Two accessible ground points are
the screw jacks of the Data Port connector.)
1. Turn off power to the MJ-X
jack (the 10-contact connector with the two wing-
nuts.)
Siemens Power Transmission & Distribution, Inc.
:
MJ-XL Jumpers and Battery Replacement
This jumper shorts signals C&C2 (P3B-11&12). J1 is a redundant jumper, since MJ-X
factory with a terminal strip jumper across P3B-11&12. With either jumper installed, the terminal strip,
the CT current path for the regulator is complete. Removing both the terminal strip jumper and the J1
jumper allow for an external "auxiliary apparatus" (e.g., an external current meter) to be connected in the
CT current path.
Caution: Open circuiting the C&C2 connections may damage the regulator Current Transformer
(CT). Keep C&C2 shorted unless connected to an appropriate external current-handling device.
J9 determines the signal path for the "External Source" power.
With J9 installed, the External Source signal comes from the Yellow banana plug on the front panel.
With J9 removed, the External Source signal comes from "J412" (P3B-9).
Caution: Do not connect AC sources to both "J412" and the External Source (yellow) banana
plug while J9 is installed. Be sure that J9 jumper is un-installed before making an AC Source
connection to J412.
Selects DCE/DTE for MJ-X
1-2: DCE (default)
2-3: DTE
Selects DCE/DTE for MJ-X
1-2: DCE (default)
2-3: DTE
battery within 1 month of
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and disconnect the PDS
Description
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data port. (See also J23.)
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data port. (See also J22.)
2. Remove the MJ-X
(i.e., lift it off of the hinges.)
3. Remove the side screws from the unit. (There are 4.)
4. Curl back the cable clamp on the back of the unit and
remove the cable bundle from the reusable cable
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clamp.
5. Lift and move the rear cover away from the front
panel.
6. Remove the coin-cell battery (BT1) from its socket.
See Figure J.1 on the previous page for battery loca-
tion.
7. Put the new coin-cell battery in the battery socket,
making sure you have the proper orientation ("+" side
up.)
8. Close the unit by reversing the steps outlined above.
9. Turn the power on and verify that the unit comes up
and displays the <METER> menu heading. If the unit
fails to come up, retrace the above steps to make
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. sure that the battery has been properly oriented and
inserted.
Verifying the Replacement Battery
After replacing the battery, verify the Low Battery Alert is
no longer active.
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ships from the
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from the weather-proof enclosure
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