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IMS-MN-LMDE42C_A
Appendix D:
LMD with Absolute Encoder
Overview
This appendix covers the multi-turn absolute encoder functions for LMD Ethernet TCP/IP
products. The multi-turn absolute encoder holds and updates the position information
regardless of the powered on/off state of the LMD device.
The absolute position in memory is powered by an internal source for up to 30 days, or by an
external battery pack to extend the life to five (5) years.
Unboxing Procedure
When unboxing the product, the internal storage should be considered to be in a discharged
state.
1. Connect DC power in accordance with “Electrical Installation” on page 48.
2. Allow the unit to charge for a period of 24 hours. During this time, programming and
commissioning the unit may be performed.
3. The internal storage level my be queried via the communications or network interface.
4. If an application requires position retention of the LMD in an unpowered state for greater
than 30 days, an external Back-up Battery Pack (ICP0531) is required. This accessory will
extend the data retention and update time up to five (5) years for up to six (6) LMD absolute
encoder products.
Connection of the Multifunction Interface
Absolute Encoder Version Variance from Standard LMD Products
The pin configuration differs on LMD absolute encoder units as the analog input is replaced
with the input for the Encoder Back-up Battery Pack (ICP0531).
• P2a Pin 6: VBAT+
• P2a Pin 7: VBAT-
These pins are used to connect the optional ICP0531 Encoder Backup Battery Pack.
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