Functional description
R&S
®
TS-PSM3
17
User Manual 1178.2780.02 ─ 01
5 Functional description
5.1 R&S TS-PSM3
5.1.1 Signal concept
The power relays of all channels of the R&S TS-PSM3 can be wired up with power
supplies or loads via the front of the module. In addition all channels can be routed to
the rear of the R&S TS-PWA3 PowerTSVP chassis via the optional R&S TS-PRIO3
Rear I/O Module. In the R&S TS-PCA3 CompactTSVP chassis there is the option to
route all low power channels and high power channels 9 to 14 to the rear via the R&S
TS-PK04 cable set.
Each channel can be used as a sense line or power line in order to create a connection
between load and power supply unit.
The voltage drop corresponding to the current flow through each channel of the R&S
TS-PSM3 can be measured via shunt resistors on the low power channels and current-
voltage converters on the high power channels via the chassis’s analogue bus. The
exact value of the shunt resistors is determined when calibrating the module. Likewise
the current- voltage characteristics are available for each high-current channel of the
R&S TS-PSM3 . These values are used for calculating the actual current through the
channel. The amount of current through a channel can be retrieved from the module
via the IVI switch driver when the measured voltage level is specified.
The R&S TS-PSM3 (variant 03) can be ordered with a Virginia Panel Corp. (VPC) con-
nector on the front of the module. The connector is connected to the individual chan-
nels of the module via terminals on the switch card using a pre-assembled cable set. In
the R&S TS-PSM3B (variant 02 ) without VPC the user can connect his loads or power
supply units with his own cables via apertures on the front plate of the module to the
terminals of the channels.
5.1.2 System Functions
The system functions are implemented by a local processor with internal Flash. There
is also an external FRAM. The cycle counters of all relays on the R&S TS-PSM3 are
located in the FRAM. The readings can be retrieved from the module via the IVI switch
driver.
Communication with the system controller in the CompactTSVP or an external control
computer is via the CAN bus.
The functions of the R&S TS-PSM3 can be summarized as follows:
●
Analog function test
●
Connection of voltage/current sources
R&S TS-PSM3
