ACCEL-7450 User's Manual
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Connector Pin Assignments
Signal Pin No.
Return Line Pin No. Signal Name Signal Direction
1 19
STROBE
Printer ← Host
2 ～ 9 20 ～ 27 DATA Printer ← Host
10 28 ACK Printer → Host
11 29 BUSY Printer → Host
12 30 PE Printer → Host
13 — SELECT Printer → Host
14 — AUTO FEED Printer ← Host
15 — NC NC
16 — SIGNAL GND Printer ↔ Host
17 — CHASSIS GND Printer ↔ Host
18 — +5V Printer → Host
31 — PRIME Printer ← Host
32 — ERROR Printer → Host
33 — SIGNAL GND Printer ↔ Host
34 — NC Printer → Host
35 — PULLED UP 5V Printer → Host
36 — SELECTIN Printer ← Host
7.2.2 USB Interface
USB 2.0 Full-Speed
The following table provides the standardized contact terminating assignments by number and
electrical value for Series “A” and Series “B” connectors.
Contact Number Signal Name Colour
1 VBUS Red
2 D- White
3 D+ Green
4 GND Black
Figure 7-2 Sequence diagram
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