3220-ddt & 3220-ddr.ib.doc
Page 10 of 12
24/03/2004
INPUT 1
DDT-3220
INPUT 2
INPUT 3
INPUT 4
P2
NON-URGENT
ALARM
URGENT
ALARM
OUTPUT 1
DDR-3220
OUTPUT 2
OUTPUT 3
OUTPUT 4
P2
NON-URGENT
ALARM
URGENT
ALARM
RS-422 Connection:
For connections to the RS-422 line, wire pins from P2 to a DB9 Female connector as follows:
PL4 DB9F
2A 2
2B 7
3A 3
3B 8
4A 4
Ground
4B 6
Ground
Front & rear panel connector diagrams
The following front panel and rear assembly drawings are not to scale and are intended to show connection order
and approximate layout only.
LASER FAIL
DC
CH4
CH3
CH2
CH1
DDT-3220
N140
CAUTION
Direct
connections
to module
RECEIVE FAIL
DC
CH4
CH3
CH2
CH1
DDR-3220
N140
CAUTION
Direct
connections
to module
1B
1A
4B
4A
P2