ABB

ABB IEMMU21-IT Module Mounting Unit

IEMMU11/12/21/22

The IEMMU11, IEMMU12, IEMMU21, and IEMMU22 are module mounting units used to house standard INFI 90 ® OPEN system modules and the BRC-100 Harmony Bridge Controller module of the Symphony™ Enterprise Management and Control System in system cabinets. The mounting units are available with a front or rear mount card chassis and are available with or without primary power distribution. NOTE: The IEMMU11, IEMMU12, IEMMU21, and IEMMU22 Module Mounting Units can replace existing IEMMU01 and IEMMU02 Module Mounting Units. This instruction explains how to install and maintain the module mounting unit.

Total number of pages in this instruction is 35, consisting of the following: Page No. Change Date Preface Original List of Effective Pages Original iii through vi Original 1-1 through 1-7 Original 2-1 through 2-3 Original 3-1 through 3-10 Original 4-1 through 4-2 Original 5-1 through 5-4 Original 6-1 Original Index-1 through Index-2 Original

When an update is received, insert the latest changed pages and dispose of the superseded pages. NOTE: On an update page, the changed text or table is indicated by a vertical bar in the outer margin of the page adjacent to the changed area. A changed figure is indicated by a vertical bar in the outer margin next to the figure caption. The date the update was prepared will appear beside the page number.

INTRODUCTION IEMMU01 AND IEMMU02 REPLACEMENT 1 - 2 WBPEEUI200501B0 ® mounting units. Typically, systems that use IEPMU01/02 do not use distributed primary power to the mounting units. Systems that use Modular Power System II do not allow distributed primary power to the mounting units. The IEMMU11 module mounting unit is used when the cabinet configuration requires a rear mount chassis with primary power distribution. The IEMMU12 module mounting unit is used when the cabinet configuration requires a front mount chassis with primary power distribution. IEMMU21 and IEMMU22 Module Mounting Units The IEMMU21 and IEMMU22 module mounting units provide physical mounting for up to 12 system modules; provide electrical distribution of I/O expander bus, module bus, and Controlway signals; and distribution of regulated power supply voltages (+5 V, +15 V, and –15 V). The IEMMU21/22 module mounting units are the preferred choice for use with Modular Power System II. The IEMMU21 module mounting unit is used when the cabinet configuration requires a rear mount chassis with no primary power distribution. The IEMMU22 mounting unit is used when the cabinet configuration requires a front mount chassis with no primary power distribution

IEMMU01 AND IEMMU02 REPLACEMENT The IEMMU11, IEMMU12, IEMMU21, and IEMMU22 units are functional equivalents to existing IEMMU01 and IEMMU02 units. The I/O expander bus interconnect cables are different however. The new module mounting units utilize a grey ribbon cable (refer to Table 5-1 for part number) to connect I/O expander bus between adjacent units. This cable replaces the amber colored interconnect cable used on the IEMMU01 or IEMMU02 unit.

IEMMU01 AND IEMMU02 CONNECTION A transition board (refer to Table 5-3 for part number) is needed if an IEMMU11, IEMMU12, IEMMU21, or IEMMU22 unit is to be connected to an IEMMU01 or IEMMU02 unit. The amber color interconnect cable connects from the IEMMU01 or IEMMU02 unit to the transition board plugged into the IEMMU11, IEMMU12, IEMMU21, or IEMMU22 unit backplane. Refer to TRANSITION BOARD INSTALLATION in Section 3 for details.