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Chapter 3

Specifications

Typical for 25 °C unless otherwise specified.

Specifications in italic text are guaranteed by design.

Power consumption

Table 1. Power consumption specifications

Not supplying power to external encoders:

+5 V 325 mA typical, 460 mA max.

Typical supplying 1 Dynamics Research Incremental Optical Rotary Encoder part number M21AAFOBB2E-2500:

+5 V 1058 mA typical, 1479 mA max.

Input

Table 2. Input specifications

Receiver type SN75ALS175 quad differential receiver

Configuration Each channel consists of PhaseA input, PhaseB input and Index input; each

input switch / jumper selectable as single-ended or differential

Differential



PhaseA, PhaseB and Index (+) inputs at user connector routed to (+) inputs of

differential receiver.

 PhaseA, PhaseB and Index (-) inputs at user connector routed to (-) inputs of

differential receiver.

Single - ended



PhaseA, PhaseB and Index (+) inputs at user connector routed to (+) inputs of

differential receiver.

 PhaseA, PhaseB and Index (-) inputs at user connector routed to ground.

(-) inputs of differential receiver routed to +3 V reference.

Number of channels 4

Common mode input voltage range ±12 V max.

Differential input voltage range ±12 V max.

Input sensitivity ±200 mV

Input hysteresis 50 mV typ.

Input impedance 12 kΩ min.

Propagation delay 27 ns max. (tpLH, tpHL)

Absolute maximum input voltage:

Differential ±14 V max.

Miscellaneous



Meets or exceeds ANSI EIA/TIA-422-B, EIA/TIA-423-B, RS-485.

 Meets ITU recommendations V.10, V.11, X.26, X.27.



Designed for multipoint busses on long lines and in noisy environments.

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Measurement-computing PCI-QUAD04 Manual de usuario Pagina 13