Studer D19m, Service Instructions Manual, Page: 76 / 100

D19m Technical Description
E62 D19m
Date printed:
30.06.20
2.6.3 RS422-to-Optical Converter
1.940.579
This assembly is a partially equipped version of the D19m RCC card
1.940.576. It is used for the conversion of a balanced RS422 signal to an
optical signal and vice versa between the stallion box and the RCC card.
It can be installed in any free slot of a D19m rack; operating voltage is 5 V.
The front panel LED displays either the send or the receive signal (jumper-
selectable).
The RS422 signal is wired to the 96-pin DIN 41612 female connector.
Jumper diagram of the earlier version 1.940.577 at the end of this chapter.
Pin assignments:
Signal Pin on 96-pin DIN 41612 connector Pin on flat cable connector on backplane
RA 7c 5
RB 7a 6
TA 6a 1
TB 6c 2
LED: SUPPLY Indicates “ power on” status.
SIGNAL Indicates the RS422 (send) or the OPTO (receive) signal, depending on the
jumper setting.
Jumper: RS422 / OPTO In position “RS422” , the SIGNAL LED indicates the send signal; in posi-
tion “OPTO”, it indicates the receive signal.
SUPPLY
SIGNAL
OPTO
RS422