Modules
R&S
®
OSP
68
User Manual 1178.7100.02 ─ 05
3.10
R&S
OSP-B103 Digital I/O Module
Figure 3-22: R&S
OSP-B103
The digital input/output one-slot
OSP-B103 (order no. 1505.5301.02) con-
sists of a 16-bit input port and a 16-bit output port, controlled by a logic interface.
See also
Chapter 6.1, "Applications of Module R&S
The input and output channels are independent of each other. The output pattern (
) depends on your settings, the input pattern (
) can be arbitrary.
●
The
output
channels are available on the first 16 sockets of the lower D-Sub con-
nector (female). The remaining sockets 17 to 25 are connected to +28
V. All output
channels can be programmed independently from each other. You can use the out-
put port for external relays that require up to 28
V switching voltage, as, for exam-
ple, in
.
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. Each output is protected by two TVS diodes
against transient disturbances, which can occur when switching inductive loads
such as relay coils.
●
The
input
channels for +3.3
V TTL signals (tolerating up to +5
V, see below) are
available on the first 16 pins of the upper D-Sub connector (male). The remaining
pins 17 to 25 are connected to ground (GND). The module's dialog in the firmware
and the SCPI command
can read and show the state of the input
channels at any time. Each input channel is protected by a lowpass filter and two
TVS diodes against transient disturbances. If your application requires a voltage
together with the input channels, you can use the 28
V supplied by the output con-
nector, or use an external voltage source.
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"
The switch unit provides power supply and control via a single module bus cable to a
module bus connector on the module's printed board. The module's on-board memory
stores its configuration data.
R&S
OSP-B103 Digital I/O Module