HIMA HIQuad X - Redundant H51 X Base Rack and I;O Level (24 VDC); Figure 23: Redundant Connection to H51 X Base Rack (24 VDC) and Redundant I;O Level

System Product Description
HI 803 211 E Rev. 1.01.00 Page 43 of 110
4.3.3 Redundant H51X Base Rack and I/O Level (24 VDC)
To ensure increased availability, the user can individually structure the redundancy of the I/O
processing modules, and thus of the I/O level. The 24 V power supply is performed for the H51X
base rack by using redundant power supply units, see Figure 20. The I/O level is supplied
redundantly depending on the application, such as shown in Figure 22.
In the example below, one power supply unit (L1+) powers the extension racks with odd rack
IDs while a redundant power supply unit (L2+) powers the racks with even IDs. In this example,
the redundancy of the I/O level is portioned based on the rack IDs so that operation is ensured
even if a power supply unit fails.
Connection to redundant power supply units, see Figure 20
XG.3 terminal (L+) for connecting to 24 VDC in accordance with redundant application
Redundant supply of the F 7133 power distribution modules, insert jumpers in accordance with the
application
Reference potential L-
Figure 23: Redundant Connection to H51X Base Rack (24 VDC) and Redundant I/O Level
i
For redundant power supply, HIMA recommends using the K 7212 power distribution
module with decoupling diodes.