IEMMU21 ABB Input module Brand new

Connectors P57 through P60 (located on the four corners of the

board) allow connecting the system I/O expander bus between

each individual mounting unit (Fig. 2-1). The system modules

located in each mounting unit connect to the expander bus

through connectors P2-1 through P2-12 on the backplane

assembly. The I/O expander bus connects to P2 connector on

the system modules.

NOTE: I/O expander bus cables are shown in Figure 3-2. If mixing

IEMMU11/12/21/22 and IEMMU01/02 mounting units, a transition

board is required. The board will not work unless it is used in the

left-hand socket of the backplane connector (P58 or P60). The

IEMMU01/02 I/O expander bus cable connects to the transition

board (refer to Table 5-1 for part number). Additional information is

given in TRANSITION BOARD INSTALLATION in Section 3. 

Dipshunts are located in XU1 through XU11 to allow breaking

the expander bus connection between modules as required and

dependent on the module configuration. 

NOTE: The number one expander bus slot is connected to P57 and

P59 whether XU1 is present or not present. The number 12

expander bus slot is connected to P58 and P60 whether XU11 is

present or not present.

CONTROLWAY AND MODULE BUS

Controlway or module bus A enters the mounting unit through

connector P53. The signal is distributed through the mounting

unit across the backplane assembly and connects to the P1

connector on the system modules. The bus can be divided into

three segments using jumpers J2 and J3. Refer to CONTROLWAY AND MODULE BUS SEGMENTING in Section 3 for

detailed information. 

Bus B enters the mounting unit through connector P54. The

signal is distributed through the mounting unit across the

backplane assembly and connects to pin 4 on the P1 connectors. The bus can be divided into three segments using jumpers J1 and J4. Refer to CONTROLWAY AND MODULE BUS

SEGMENTING in Section 3 for detailed information. 

OVERCURRENT PROTECTION

All input power to the mounting unit is fused and filtered

through a power entry panel. The power supplies providing the

regulated voltages are fused and filtered.