Functions
R&S
®
TS-PMB
16
User Manual 1153.5233.12 ─ 06
on page 24). This does not apply to channels IL1 ... IL3, which can be switched to all
lines of the local analog bus.
Coupling relays separate the local analog bus lines (LAB) on the R&S TS-PMB from
the bus lines on the analog bus backplane. The firmware automatically switches these
relays selectively when at least one I/O channel is switched to the corresponding local
analog bus. When an I/O channel is no longer switched to a bus, the corresponding
coupling relay is automatically opened. This function can be turned on or off at any
time. The coupling relays can also be switched manually.
6.5
Interfaces
)
The SPI interface (Serial Peripheral Interface) is used for communication with rear I/O
modules. The R&S TS-PMB is controlled via CAN interface (Controller Area Network).
6.6
Power supply
The R&S TS-PMB is operated with a voltage of 5 V. The power supply is provided
through connector X20 for Versions V1.x and V2.x. In version V3.x or higher (first deliv-
ery in 2004), the power supply is provided via connector X20 or connector X1. All ver-
sions of the R&S TS-PMB can be operated in the R&S
TSVP base units.
Since the R&S
CompactTSVP no longer makes a 5
V power supply available on con-
nector X20 starting with backplane version V4.x in 09/2005, only R&S TS-PMB mod-
ules of version V3.x or higher can be operated with this backplane version. R&S TS-
PMB modules of version V2.x require a change to TAZ 2.14 and a rear IO module
R&S
TS-PRIO, which enables the CAN bus lines und supplies the front module with 5
V.
Power supply
