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NR&D Distributors

Seriplex™ Drive Interface

Niobrara's SDI is a Seriplex drive interface that connects a variable speed motor drive to a Seriplex network. The SDI permits a Seriplex master to issue motor speed and direction instructions to the drive and allows the drive to report status and fault conditions to the master. The SDI is a small, DIN rail mountable module which is easy to connect, configure, and use.

Motor speed is controlled by a 0-10 volt analog output from the SDI, written as a 12-bit word with 10-bit resolution. In addition, the SDI provides three Seriplex digital outputs plus three Seriplex digital inputs which can be used as an application requires.

The SDI operates on Mode 2 Seriplex networks of either 12 or 24 volts and requires one 16-bit input word and one 16-bit output word from the motor. The multiplex channel address and starting bit address define which Seriplex bits are used by the SDI. A DIP switch on the front panel configures these addresses; switch bits SW1 through SW4 set the multiplex channel from 0-15 and switch bits SW5 through SW8 set the starting bit address

Major Applications and Industries:

Material Handling/Packaging Fiber and Textiles Fan/Pump control Wire and Cable Machine Tool

Product Features:

Optical isolation between the motor interface and the Seriplex network Mode 2 (master/slave), multiplex channel and starting address switch selectable
Seriplex side: Drive Side
  • 12 or 24 VDC
  • 12 or 24 VDC
  • 16 Input bits and 16 Output bits
  • 10-bit Analog speed output
  • 2 Digital Outputs
  • 3 Digital Outputs (including Seriplex running)
  • 3 Digital Inputs (including drive side powered)
  • 2 Digital Inputs


Dimensions: 3.8" x 1.5" x 1.7" deep (including DIN rail mount). Approximately 3.5 oz. (99g.)

Digital Outputs: Sourcing, 100mA max. at +12 or +24 VDC

Analog Output: 9-12 VDC reference, 4.7K ohm impedance, 12-bit word (10-bit resolution)

Digital Inputs: True: >7 VDC on 12 VDC and >19 VDC on 24 VDC; 4.7K ohm impedance

Drive-side Power: 12 or 24 VDC, 65mA plus ouput loads

Motor Drive Connector: Weidmuller SLA 10-pin connector

Seriplex Power: From Seriplexc bus; 12 or 24 VDC, 40mA max.

Seriplex Connector: Phoenix Combicon 5-pin connector.

Controls: DIP switch sets multiplex channel address, starting bit address


The SDI is available as:

SDI with connectors for Seriplex network and motor drive interface

Effective 01 July 1996 - Specifications subject to change without notice.