Measurement Computing CIO-QUAD0x - Manual (Page 17)

5 ELECTRICAL SPECIFICATIONS
(All Specifications typical for 25°C unless otherwise specified.)
INPUT SECTION
Receiver type SN75ALS175 quad differential receiver
Configuration Each channel consists of Phase A input, Phase B input and Index input;
each input is switch & jumper-selectable as single-ended or differential.
Differential Phase A, Phase B and Index (+) inputs at user connector routed to (+)
inputs of differential receiver.
Phase A, Phase B and Index (-) inputs at user connector routed to (-)
inputs of differential receiver.
Single - ended Phase A, Phase B and Index (+) inputs at user connector routed to (+)
inputs of differential receiver.
Phase A, Phase B and Index (-) inputs at user connector routed to ground.
(-) inputs of differential receiver routed to +3V reference.
Number of channels
CIO-QUAD02 2
CIO-QUAD04 4
Common mode input voltage range ±12V max
Differential input voltage range ±12V max
Input sensitivity ±200mV
Input hysteresis 50mV typ.
Input impedance 12 kohm min.
Propagation delay 27 ns max.
Absolute maximum input voltage
Differential ±25V max.
Miscellaneous Meets EIA RS422, 423, 485 and CCITT V.10, V.11, X.26, X.27.
Designed for Multipoint busses on long lines in noisy environments
COUNTER SECTION
Counter type LS7266R1 24-bit Dual-axis Quadrature Counter
Quadrature Mode
Clock frequency 4.3 MHz max
Separation 57 ns min
Clock pulse width 115 ns min
Index pulse width 85 ns min
Count Mode
Clock frequency 30 MHz max, (25 MHz max Mod-N mode)
Clock A - high pulse width 16 ns min
Clock A - low pulse width 16 ns min
Filter clock (FCK) 10 MHz
Digital filter rate 10 MHz, software-selectable divider (1 to 256 in single steps)
Crystal oscillator (FCK source)
Frequency 10 MHz
Frequency accuracy 100 ppm
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