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USER
MANUAL

MODEL 222N
and 222NS

Miniature RS-232 to
RS-422 Converters

C E R T I F I E D

An ISO-9001

Certified Company

Summary of Contents for 222N, 222NS

Page 1: ...USER MANUAL MODEL 222N and 222NS Miniature RS 232 to RS 422 Converters C E R T I F I E D An ISO 9001 Certified Company...

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Page 3: ...e suppressors S model only 3 1 SETTING THE DTE DCE SWITCH For your convenience the Model 222N has an externally accessible DTE DCE switch see diagram below If the device connected to the Model 222N is...

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Page 5: ...ows how a cross over cable should be constructed for an environment where both the Model 222N and the RS 422 device use a 6 wire RJ 11 connector Similar logic should be followed when using RJ 45 conne...

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Page 7: ...is positive and which color is negative Ultimately you will want to construct a two pair cross over cable that makes a connection with the RS 422 device as shown below Model 222N RS 422 Device XMT RC...

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Page 9: ...ve connector screws NOTE If you must use a cable to connect the Model 222N to the RS 232 device make sure it is a straight through cable of the shortest possible length we recommend 6 ft or less 4 3 O...

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Page 11: ...ptimum performance from the Model 222N please keep the following guidelines in mind Always use twisted pair wire this is not an option Use twisted pair wire with a capacitance of 20pf ft or less Avoid...

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Page 13: ...and RCV are the EIA 422 A and B receivers respectively N N N N N N 2 XMT Transmit Data 3 RCV Receive Data Transmit Data XMT 14 Receive Data RCV 16 SIGNAL PIN SIGNAL PIN RJ 11 6 Pin SIGNAL PIN 1 G Gro...

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