Hardware Control Signal Descriptions

Request To Send (RTS) is a Control Signal from the S-Series Printer to the host computer. RTS is always in the ACTIVE condition (positive voltage) whenever the printer is powered ON.

Data Set Ready (DSR) is a control signal from the host computer to the printer. When DSR is in the ACTIVE condition (positive voltage), the printer can transmit status to the host. When CTS is in the INACTIVE condition (negative voltage), the printer will not transmit any data.

When DTR/DSR handshaking is selected, via DIP Switch #7 at the rear of the printer, the Data Terminal Ready (DTR) Control Signal output from the printer controls when the host computer may send data. DTR ACTIVE (Positive voltage), permits the host to send data. When the printer places DTR in the INACTIVE (negative voltage) state, the host must not send data.

Note: When XON/XOFF handshaking is selected, data flow is controlled by the ASCII Control Codes DC1 (XON) and DC3 (XOFF). The DTR Control lead will have no effect.

RS-232 Cabling Requirements

The required cable must have a 25-pin “D” Type (DB25P) male connector on one end, which is plugged into the mating (DB25S) female connector located at the upper rear of the printer. Tighten the locking screws.

The other end of the Signal Interface Cable connects to an appropriate point at the host computer. This cable will be one of two types depending on the specific interface requirements. Refer to the following pages for information on the standard and null modem cables.

Data cables must be fully shielded and fitted with metal or metallized connector shells. Shielded cables and connectors are required to prevent radiation and reception of electrical noise.

Zebra S-Series User’s Guide

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