Metrologic Instruments MLPN 2178 manual Versions 11 and 24 Pin Assignments for RS-485

Versions “11” and “24” Pin Assignments for RS-485

The version “11” and “24” scanners head cables are terminated with a male 25-pin D-type connector. To connect the scanner to the host device, may require a communication cable. The communication cable may include a connection for a transformer or it may be designed to draw power directly from the host device. This item can be ordered at the same time scanner is purchased.

The version “11” and “24” scanners are designed to be used primarily with IBM® 46XX series of electronic cash registers. It can also be configured to communicate using the full RS-232 and OCIA protocol.

The following is a list of the pin assignments. The pin numbers are impressed on the head cable’s connector.

Pin	Function
1	AC Shield Ground
2	RS-232 Receive Input
3	RS-232 Transmit Output
4	CTS Input
5	RTS Output
6	Reserved
7	Signal Ground
8 - 12	Reserved
13	Earth Ground
14	Power Ground 1
15	468X -B
16	468X +A
17	OCIA Clock In Return
18	OCIA Clock In
19	Power (11 - 30 volts) DC
20	DTR Input
21	OCIA Clock Out
22	OCIA Clock Out Return
23	OCIA RDATA
24	OCIA RDATA Return
25	Power Ground 2

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