-45 terminal blocks universal parallel centronics or db-25 x.21 db-15 10/100 base-tx cat- ... protects all parallel interface pins surge handling capacity of 1,500 watts ... centronics or db-25 options protects any x.21 rs- ... or t1 interface port that uses a db-15 connector data rates up to 20 mbps clamping ...
standard parallel both the 36-pin centronics® and db-25 connectors are commonly used ... etc is to raise or lower a control pin the ieee-1284 standard outlines methods ... channel not just raise or lower control pins the two primary ieee-1284 modes the ... as implemented in the classic 36-pin centronics® format nibble mode is reverse channel ... data back to the host the only way the centronics parallel interface primary ieee-1284 ... modes db-25 pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 ... 17 18 19 20 21 22 23 24 25 db-36 pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 32 31 ... 36 19 20 21 22 23 24 25 26 27 29 28 30 ... 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 undefined undefined undefined ... signal designations 25 24 23 22 21 20 19 18 17 16 15 14 signal/voltage signal ...