Universal Bypass Switch Unit
UNB
Operation Manual
UNB2357E / Page 28 (34)
8.5 Pinning – Interface RS232
Connector X7 (Sub-Min-D, 9pol):
Signal
Term
UNB PC Pin
Level
RS232_2_RxD
Receive
data <-
2 V.28
RS232_2_TxD
Transmit
data ->
3 V.28
RS232_2_DTR Data transmit
ready
->
4
V.28
RS232_2_GND
Signal
ground -
5 V.28
RS232_2_DSR Data set
ready
<-
6
V.28
RS232_2_RTS Request to
send
->
7
V.28
RS232_2_CTS
Clear
to
send <-
8 V.28
9. Maintenance
The SBS consists of ultramodern and nearly wear-free
components. Nevertheless, it is recommended that, to
ensure continuous availability and reliability, visual inspection
and function tests should take place in regular intervals.
During visual inspection to be checked,is whether:
mechanical damages or external-particle is noticed,
hazardous filth or dust-particles are existing disturbing
the airflow and cooling facilities.
If heavy dust-attack happens, the unit should be blown out
with dry compressed air in order to enable a better heat-
exchange as a precaution. The time-periods of the visual
inspection to be enforced primarily depend on the ambient
conditions of the units.
GND
5
DTR <- 4
TxD <- 3
RxD -> 2
1
9
8 <-
7 ->
6 <-
Picture 8.6:
Pinning – X7
RS232 - Interface
