1. Description
Trusted High Integrity Power Supply System
4
Issue 11
Rockwell Automation Publication PD_T8200
1.2.
Power Supply Modules
The Power Supply Assembly Modules are single (if redundant inputs are not required) and
dual input, hot swap, user-replaceable ac and dc units. Table 2 identifies the available types
of Modules.
Catalogue No.
Input Type
Input Power Voltage Output Power Voltage
T8220
Dual
110-240 Vac
15 Vdc
T8222
Dual
24 Vdc
15 Vdc
T8223
Single
110-240 Vac
24 Vdc
T8224
Single
110-240 Vac
15 Vdc
T8225
Dual
110-240 Vac
24 Vdc
T8226
Dual
24 Vdc
24 Vdc
Table 2 Module Types
The dual inputs on the ac Modules are galvanically isolated from each other. The inputs on
the dc Modules are diode isolated and share a common return.
1.3.
Input Power Regulation
A block diagram of a typical dual ac input I/O Power Supply Module is shown in Figure 2. A
block diagram of a typical dual dc input I/O Power Supply Module is shown in Figure 3.
Figure 2 Block Diagram of a Dual ac I/O Power Supply Module
PFC
PFC
Power Supply Module
PW M
Switching Regulator
T1:a
T1:c
T1:b
Rectifier
Rectifier
DC
Output
I/P Filter & Protection
I/P Filter & Protection
PFC A Off
I/P A Fail
PFC A Fail
Source
A
Source
B
Fail
High Tempterature
Reset
O/P Current
Status & Control
Remote Off
PFC B Off
I/P B Fail
PFC B Fail
Status & Control
