Specifications; Power Consumption; Input - Measurement Computing PCI-QUAD04 User Manual

Specifications

Typical for 25 °C unless otherwise specified.
Specifications in italic text are guaranteed by design.

Power consumption

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

Receiver type
Configuration
Differential
Single - ended
Number of channels
Common mode input voltage range
Differential input voltage range
Input sensitivity
Input hysteresis
Input impedance
Propagation delay
Absolute maximum input voltage:
Differential
Miscellaneous
Table 1. Power consumption specifications
Table 2. Input specifications
SN75ALS175 quad differential receiver
Each channel consists of PhaseA input, PhaseB input and Index input; each
input switch / jumper selectable as single-ended or 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.
! 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.
4
±12 V max.
±12 V max.
±200 mV
50 mV typ.
12 kΩ min.
27 ns max. (tpLH, tpHL)
±14 V max.
! 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.
4-1
Chapter 4