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USER GUIDE
USB-6501 OEM
This user guide describes how to use the National Instruments USB-6501
OEM data acquisition (DAQ) device.
The NI USB-6501 OEM is a full-speed USB 2.0 device that provides
24 DIO channels and a 32-bit counter.
Dimensional Drawings
Figure 1 shows a top view of the USB-6501 OEM. Figure 2 shows the front
and rear dimensions.
0.45 in. (11.5 mm)
0.18 in. (4.5 mm)
–0.03 in. (–0.8 mm)
0.125 in. (3.18 mm) Diameter
–0.18 in. (–4.6 mm)
2.26 in. (57.4 mm)
2.13 in. (54.1 mm)
1.78
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Pin 1 0.45 in. (11.5 mm) 0.25 in. (6.4 mm) 0.34 in. (8.6 mm) 0.06 in. (1.6 mm) Figure 2. USB-6501 OEM Dimensions (Front and Rear Views) Block Diagram Figure 3 shows key functional components of the USB-6501 OEM device. Short Circuit Protection Current Limiting Circuit Vbus +5 V P2.<0..7> USB Microcontroller P1.<0..7> USB P0.<0..7> Figure 3. Device Block Diagram Refer to the Safety Guidelines section of this document for important safety information. Installing Software To install the dr
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I/O Connector and Cable Use any 34-pin female IDC (ribbon) cable to connect to the IDC connector on the USB-6501 OEM device. Table 1 lists the pin assignments and signal names for the IDC connector. Table 1. Pin Assignments Signal Pin Connector Pin Signal P1.0 1 2 GND P1.1 3 4 P2.0 P1.2 5 6 GND Pin 1 Pin 2 P1.3 7 8 P2.1 P1.4 9 10 GND P1.5 11 12 P2.2 P1.6 13 14 GND P1.7 15 16 P2.3 P0.0 17 18 GND P0.1 19 20 P2.4 P0.2 21 22 GND Pin 33 Pin 34 P0.3 23 24 P2.5 P0.4 25 26 GND P0.5 27 28 P2.6 P0.6 29
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Signal Descriptions Table 2 describes the signals available on the I/O connectors. Table 2. Signal Descriptions Signal Name Direction Description P0.<0..7> Input or Digital I/O Signals—You can individually configure P1.<0..7> Output each signal as an input or output. P2.<0..6> P2.7 (CTR 0 SRC) Input or This pin is configurable as either a digital line or an Output event counter. Digital I/O Signal—As a digital line, this signal can be used as an input or output. CTR—As a counter, this signal
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USB-6501 OEM DIO Box Short Circuit Protection Current Limiting Circuit +5 V VBus Re Rp External 4.7K Onboard Resistor Pull-up P0.0 Port Pad Resistor Rl Load A GND Figure 4. Example of Connecting External User-Provided Resistor Complete the following steps to determine the value of the user-provided pull-up resistor: 1. Place an ammeter in series with the load. 2. Place a variable resistor between the digital output line and the +5 V. 3. Adjust the variable resistor until the ammeter current re
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+5 V 1 LED P0.0 LED P0.1 P0.2 2 P0.3 P0.4 3 P0.5 +5 V TTL Signal P0.6 P0.7 4 Switch GND I/O Connector 1 P0.0 configured as an open-drain digital output driving a LED 2 P0.2 configured as a push-pull digital output driving a LED 3 P0.4 configured as a digital input receiving a TTL signal from a gated inverter 4 P0.7 configured as a digital input receiving a 0 V or 5 V signal from a switch Figure 5. Example of Connecting a Load Caution Exceeding the maximum input voltage ratings or maximum outpu
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Power-On States At system startup and reset, the hardware sets all DIO lines to high-impedance inputs. The DAQ device does not drive the signal high or low. Each line has a weak pull-up resistor connected to it. Event Counter You can configure P2.7 as the source for a 32-bit counter. In this mode, the device counts high to low transitions on P2.7. The counter can be armed and disarmed and the count can be read or reset through software. Refer to your software documentation for more informat
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Pull-up resistor........................................4.7 kΩ VBus (nominally 5 V) Absolute voltage range ...........................–0.5 to 5.8 V with respect to GND Power-on state ........................................Input (high impedance) Digital logic levels Level Min Max Units Input Input low voltage –0.3 0.8 V Input high voltage 2.0 5.8 V Input leakage current — 50 µA Output Output low voltage (I = 8.5 mA) — 0.8 V Output high voltage Push-pull, I = –8.5 mA 2.0 3.5 V Open-drain, I = –0
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Power Requirements USB 4.10 to 5.25 VDC............................ 80 mA typical, 500 mA max USB Suspend .................................. 300 µA standby mode, 500 µAmax Physical Characteristics Dimensions ............................................ 5.74 cm × 6.73 cm × 1.15 cm (2.26 in. × 2.65 in. × 0.45 in.) I/O connectors ........................................ USB series B receptacle; 34-pin IDC ribbon cable header Weight.................................................... 21 g (.74 oz)
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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 temp
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Note Refer to the Declaration of Conformity (DoC) for this product for any additional regulatory compliance information. To obtain the DoC for this product, visit ni.com/certification, search by model number or product line, and click the appropriate link in the Certification column. Safety Guidelines Caution Operate the hardware only as described in these operating instructions. The following section contains important safety information that you must follow when installing and using the US
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Avoid contact between your body and the connector block signal when hot swapping modules. Remove power from signal lines before connecting them to or disconnecting them from the device. 1 Operate the device at or below the Measurement Category I . Measurement 2 circuits are subjected to working voltages and transient stresses (overvoltage) from the circuit to which they are connected during measurement or test. Measurement categories establish standard impulse withstand voltage levels that
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Where to Go for Support The National Instruments Web site is your complete resource for technical support. At ni.com/support you have access to everything from troubleshooting and application development self-help resources to email and phone assistance from NI Application Engineers. National Instruments corporate headquarters is located at 11500 North Mopac Expressway, Austin, Texas, 78759-3504. National Instruments also has offices located around the world to help address your support ne
