Direction
4-pos.
Name
Description
screw terminal
I/O
3
Tx+ (A/A’)
Transmit
(RS-422)
Transmit/Receive
(RS-485)
I/O
4
Tx– (B/B’)
Transmit
(RS-422)
Transmit/Receive
(RS-485)
I
1Rx+ (A’)
Receive
(RS-422)
I
2
Rx– (B’)
Receive
(RS-422)
13
6610-2203
Direction
Pos. no.
Name
Description
I/O
3
RING
Transmit/Receive
I/O
4
TIP
Transmit/Receive
I/O
2
RING*
Transmit/Receive
I/O
5
TIP*
Transmit/Receive
5.2.6 Interface RJ-11, PSTN
*) Modem is configurable by a DIP switch setting
Direction
Pos. no.
Name
Description
O
1LL1
Transmit
(4-wire)
O
2
LL2
Transmit
(4-wire)
I/O
3
LL3
Receive
(4-wire)
Transmit/Receive
(2-wire)
I/O
4
LL4
Receive
(4-wire)
Transmit/Receive
(2-wire)
5.2.4 Interface Leased Line
Direction
Pos. no.
Name
Description
I
1AL1
Alarm 1
Input
I
2
AL2
Alarm 2 Output
I
3
AL_COM
Alarm Common
5.2.5 Interface Alarms
5.2.3 Interface RS-485/422, 4-pos screw terminal
1
2
3
4
1
2
3
4
3
2
1
