• ZD421 and ZD621 Desktop Printers User Guide
Universal Serial Bus (USB) Interface
Universal Serial Bus (USB) Interface

Universal Serial Bus (USB) Interface

This figure shows the cable wiring required to use the printer’s USB two interfaces.
When used with third-party cables, your printer requires USB cables—or USB cable packaging—that bears the “Certified USB” mark to guarantee USB 2.0 compliance. Visit usb.org for details.
Type A and Type B connectors require different pinouts.
USB A style connector pinouts (A in the image shown)
Pin 1 — Vbus (+5 VDC). (Pin 2 — D- (Data Signal, Negative Side)
Pin 3 — D+ (Data Signal, Positive Side)
Pin 4 — Shell (Shield/Drain Wire)
USB B style connector pinouts (B in the image shown)
Pin 1 — Vbus (Not Connected)
Pin 2 — D- (Data Signal, Negative Side)
Pin 3 — D+ (Data Signal, Positive Side)
Pin 4 — Shell (Shield/Drain Wire)
USB Host +5 VDC power source is shared with serial-port phantom power. It is limited to 0.5mA per USB Specification and with on-board current limiting. The maximum current available through the serial port and USB port should not exceed a total of 0.75 Amps.