Modules
R&S
®
OSP
71
User Manual 1178.7100.02 ─ 05
The
5
th
port
of the R&S
OSP-B104 (in the module panel's top position) is a female 15-
pin D-Sub connector, labeled
[IN / OUT]
. The input and output channels are described
in
Chapter 6.2.3, "Input Ports of R&S
on page 234. This port is independent from the
[RELAY] ports. It supports basic simultaneous monitoring functions, including interlock
handling.
●
The module's dialog in the firmware (
can display and query the state of the input channels at any time.
●
You can use the output pins 2 to 6 and the input pins 10 to 13 as auxiliary lines.
Each output channel is designed as a MOS-FET (open drain) that leaves the chan-
nel's pin on high impedance in the inactive state. When activated, the FET
switches the pin to internal ground. You can use pin
1 (+28
V
DC) or an external
voltage source (maximum 28
V
DC). The maximum current load is 200
mA per out-
put channel.
Do not
overload
the input: for voltages >
5
V
DC up to 28
V
DC, insert a
22
k
Ω
resis-
tor, see
Chapter 2.1.11, "Connecting Control Cables"
Transfer switches
The external DPDT power-transfer relays require being switched by control pulses
(rather than by constant levels). The R&S
OSP supports this control scheme by two
lines ("Set
A" and "Set
B") that set the switch to each position.
●
If an external relay is
not activated
("Set
B" pulse sent to the relay), the terminals
1 + 4
and
2 + 3
are connected and remain latched
●
If an external relay is
activated
("Set
A" pulse sent to the relay), the terminals
1 + 2
and
3 + 4
are connected and remain latched
Note that these activation or connection states are in contrast with other DPDT
switches, like R&S
OSP-B114, R&S
OSP-B116x and R&S
OSP-B136.
) displays the state of the external relays.
All external relays connected to the R&S
OSP-B104 (up to 4 relays) operate independ-
ently from each other.
Note that the functions
interface and the RC command
not
change the
state of the external relays. Also, the output channels of the module R&S
OSP-B104
remain unchanged upon these reset commands.
The Spinner power-transfer relays support the “carrier safety contact” concept. While
turning from one switch position to the other, the carrier safety contact remains open. If
you include this contact into the interlock path, the power amplifier connected to the
interlock control is deactivated while the relay is turning. In the final relay position, the
carrier safety contact closes again, thus closing the full interlock chain. Only then, the
power amplifier can return to operational mode.
R&S
OSP-B104 Digital I/O Module (EMS)