Modules
R&S
®
OSP
72
User Manual 1178.7100.02 ─ 05
Delay time
The external power-transfer relays connected to the R&S
OSP-B104 can have a signif-
icant settling time. Especially transfer relays with a motor drive can require tens of milli-
seconds to reach their final position.
To prevent sending a new command before a relay has reached its final position, the
switch unit allows defining a delay time between sending two consecutive commands.
Per default, a delay time of 100
ms is set for the R&S
OSP-B104 module. If the control-
ler brings up a switching error, possibly the delay time is set too short.
Refer to
on page 269 for further infor-
mation on how to change the delay time.
The Spinner power-transfer relays have an output contact indicating their position. If
you connect this contact to the "Status" pin (pin
2) of the corresponding [RELAY] con-
nector, the R&S
OSP can read and display the current state of the external relay.
The module has 6 status LEDs:
●
For each [RELAY] connector, left and right of these connectors, there is a
"[PWR]"
LED
, labeled 1 to 4.
–
If a [PWR] LED shows green light, the voltage on pin
1 of this connector is OK
(+24
V).
–
If the LED is off, there is a problem with the power on the corresponding con-
nector. In such a case, turn off the R&S
OSP, eliminate possible errors in the
cabling or the connected relay, turn the switch unit back on and check the LED
again.
●
Centered between the lower [RELAY] connectors, there are two more LEDs:
The upper
"[PWR I/O]" LED
gives the same voltage status information as descri-
bed above for pin
1 (+28
V) of the I/O connector.
–
If the LED shows green light, the power is OK.
–
If the LED is off, there is a problem with the power on the corresponding con-
nector. In such a case, turn off the R&S
OSP, eliminate possible errors in the
cabling or the connected device, turn the switch unit back on and check the
LED again.
●
The lower
"[INTERLOCK]" LED
shows the state of the interlock (pins 7 and 15).
–
If the LED is off, it indicates that the interlock is closed. In this state, the remote
control command
returns the value "1".
–
If the LED shows red light, there is no connection between the pins 7 and 15.
This state either indicates an open interlock, or at least in one of the [RELAY]
connectors, pins 3 and 4 are not connected. If the interlock is open, the remote
control command
returns the value "0".
Use a
bridge
between the interlock pins or "carrier safety contacts" of unused relay
. Bridging is especially relevant, if the interlock pins of all
connectors (also unused connectors) are used in a serial interlock loop. For example,
use a special bridging connector to bridge the pins, as described in
"Controlling External Power Relays with R&S
The module's on-board memory stores its configuration data.
R&S
OSP-B104 Digital I/O Module (EMS)
