Specifications

The following specifications are typical at 25 °C, unless otherwise noted.

Digital I/O

Number of lines

P0.<0..7>..............................................

8

P1.<0..7>..............................................

8

P2.<0..7>..............................................

8

Direction control .................................

Input or output,

software-selectable

Output driver type ...............................

Push-pull or open-drain,

software-selectable

Pull-up resistor ....................................

4.7 kΩ

Absolute voltage range.......................

-0.5 to 5.8 V with respect

to GND

Power-on state....................................

Input (high impedance)

Digital logic levels

Counter

Number of counters ............................

1 (P2.7 can be configured

as the counter)

Resolution ...........................................

32 bits

Counter measurements.......................

Falling edge counting

Maximum input frequency..................

5 MHz

Minimum high pulse width.................

100 ns

Minimum low pulse width..................

100 ns

Bus Interface

USB specification ................................

USB full-speed (12 Mb/s)

External Voltage

+5 V output

Voltage............................................

4.00 V min, 5.25 V max

Current ............................................

230 mA max

Power Requirements

USB

4.5 to 5.25 VDC...............................

80 mA typical, 500 mA max

USB Suspend ..................................

500 µA max, all DIO

lines disconnected

Physical Characteristics

Dimensions

Without connectors ........................

6.35 by 8.51 by 2.31 cm

(2.50 by 3.35 by 0.91 in.)

With connectors .............................

8.18 by 8.51 by 2.31 cm

(3.22 by 3.35 by 0.91 in.)

I/O connectors.....................................

USB series B receptacle,

(2) 16 position (screw-terminal)

plug headers

Screw-terminal wiring ........................

16 to 28 AWG copper conductor

wire with 10 mm (0.39 in.) of

insulation stripped from the end

Torque for screw terminals.................

0.22 to 0.25 N · m

(2.0 to 2.2 lb · in.)

Weight.................................................

84 g (3 oz)

Safety Standards

The USB-6501 is designed to meet the requirements of the following

standards of safety for electrical equipment for measurement, control,

and laboratory use:

• IEC 61010-1, EN 61010-1

• UL 61010-1

• CSA 61010-1

Note: For UL and other safety certifications, refer to the product label, or

click the appropriate link in the Certification column.

Overvoltage Protection

Connect only voltages that are within these limits.

Channel-to-COM (one channel) ..........

±30 V max, Measurement

Category I

Channel-to-COM

(one port, all channels) .......................

±8.9 V max, Measurement

Category I

Measurement Category I is for measurements performed on circuits not

directly connected to the electrical distribution system referred to as

MAINS voltage. MAINS is a hazardous live electrical supply system that

powers equipment. This category is for measurements of voltages from

specially protected secondary circuits. Such voltage measurements

include signal levels, special equipment, limited-energy parts of

equipment, circuits powered by regulated low-voltage sources, and

electronics. Caution: Do not use this module for connection to signals or

for measurements within Measurement Categories II, III, or IV.

Hazardous Locations

The USB-6501 is not certified for use in hazardous locations.

Environmental

The USB-6501 device is intended for indoor use only.

Operating temperature

(IEC 60068-2-1 and IEC 60068-2-2).....

0 to 55 °C

Operating humidity

(IEC 60068-2-56) .............................

10 to 90% RH, noncondensing

Maximum altitude...............................

2,000 m (at 25 °C ambient

temperature)

Storage temperature

(IEC 60068-2-1 and IEC 60068-2-2)...

-40 to 85 °C

Storage relative humidity

(IEC 60068-2-56) .............................

5 to 90%, noncondensing

Pollution degree (IEC 60664) ..............

2

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3

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Level

Min

Max

Units

Input low voltage

-0.3

0.8

V

Input high voltage

2.0

5.8

V

Input leakage current

–

50

µA

Output low voltage (I = 2 mA)

–

0.4

V

Output low voltage (I = 8.5 mA)

–

0.8

V

Output high voltage

Push-pull, I = -2 mA

2.8

3.6

V

Push-pull, I = -8.5 mA

2.0

3.5

V

Open-drain, I = -0.4 mA, nominal

2.0

5.0

V

Open-drain, I = -7.5 mA, with external pull-up resistor

2.0

–

V