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USB-5201 User's Guide  

Specifications 

24 

Note 6:  

The analog inputs are configured to run continuously. Each channel is sampled twice per second. 
The maximum latency between when a sample is acquired and the temperature data is provided 
by the USB unit is approximately 0.5 seconds. Throughput to CompactFlash memory card is 
limited to 1 S/s per channel. 

Digital input/output 

Table 5. Digital input/output specifications 

Digital type  

CMOS 

Number of I/O 

8 (DIO0 through DIO7) 

Configuration 

Independently configured for input or output. 
Power on reset is input mode unless bit is configured for alarm. 

Pull up/pull-down configuration 

All pins pulled up to +5 V via 47 K resistors (default). Pull down to ground 
(GND) also available.  

Digital I/O transfer rate (software 
paced) 

 

Digital input – 50 port reads or single bit reads per second typ. 

 

Digital output – 100 port writes or single bit writes per second typ. 

Input high voltage 

2.0 V min., 5.5 V absolute max. 

Input low voltage 

0.8 V max., -0.5 V absolute min. 

Output low voltage (IOL = 2.5 mA) 

0.7 V max 

Output high voltage (IOH = -2.5 mA) 

3.8 V min. 

Note 7:  

All ground pins on the device (pins 9, 19, 28, 38) are isolated from earth ground. If a connection 
is made to earth ground when using digital I/O and conductive thermocouples, the thermocouples 
are no longer isolated. In this case, thermocouples must not be connected to any conductive 
surfaces that may be referenced to earth ground. 

Temperature alarms 

Table 6. Temperature alarm specifications 

Number of alarms 

8 (one per digital I/O line) 

Alarm functionality 

Each alarm controls its associated digital I/O line as an alarm output. The input to each 
alarm may be any of the analog temperature input channels. When an alarm is enabled, its 
associated I/O line is set to output (after the device is reset) and driven to the appropriate 
state determined by the alarm options and input temperature. The alarm configurations are 
stored in non-volatile memory and are loaded at power on. Alarms will function both in 
data logging mode and while attached to USB. 

Alarm input modes 

 

Alarm when input temperature > T1 

 

Alarm when input temperature > T1, reset alarm when input temperature goes below T2 

 

Alarm when input temperature < T1 

 

Alarm when input temperature < T1, reset alarm when input temperature goes above T2 

 

Alarm when input temperature is < T1 or > T2 

Note

: T1 and T2 may be independently set for each alarm. 

Alarm output modes 

 

Disabled, digital I/O line may be used for normal operation 

 

Enabled, active high output (digital I/O line goes high when alarm conditions met) 

 

Enabled, active low output (digital I/O line goes low when alarm conditions met) 

Alarm update rate 

1 second 

Memory 

Table 7. Memory specifications 

EEPROM 

1,024 bytes isolated micro reserved for sensor configuration 
256 bytes USB micro for external application use 
256 bytes USB micro reserved for data logging configuration 

Содержание USB-5201

Страница 1: ......

Страница 2: ...USB 5201 USB based 8 Channel Thermocouple Input Device and Data Logger User s Guide Document Revision 7 June 2008 Copyright 2008 Measurement Computing Corporation...

Страница 3: ...d with same or similar device or refunded at MCC s discretion For specific information please refer to the terms and conditions of sale Harsh Environment Warranty Program Any Measurement Computing pro...

Страница 4: ...from its use No license is granted by implication or otherwise under any patent or copyrights of Measurement Computing Corporation All rights reserved No part of this publication may be reproduced sto...

Страница 5: ...12 and earlier 12 Firmware revision 3 0 and later 12 Configuring the USB 5201 13 Configuring data logging options 13 Calibrating the USB 5201 13 Chapter 3 Sensor Connections 14 Screw terminal pin out...

Страница 6: ...input section 22 Channel configurations 22 Accuracy 23 Thermocouple measurement accuracy 23 Throughput rate to PC 23 Digital input output 24 Temperature alarms 24 Memory 24 Microcontroller 25 Data Lo...

Страница 7: ...Insert the disk or CD and click the OK button italic text Italic text is used for the names of manuals and help topic titles and to emphasize a word or phrase For example The InstaCal installation pr...

Страница 8: ...ach alarm is software configurable as active high or low You set up the temperature threshold conditions to activate each alarm When an alarm is activated the associated DIO channel is driven to the o...

Страница 9: ...Isolated DC DC USB 5V 12 12 8 DIO Compact Flash connector Battery backed Real Time Clock USB Microcontroller USB PC Ext Pwr for data logging USB or External power required for data logging operations...

Страница 10: ...ored on the USB 5201 The USB 5201 is plug and play There are no jumpers to position DIP switches to set or interrupts to configure You can connect the USB 5201 before or after you install the software...

Страница 11: ...t The following items are shipped with the USB 5201 Hardware The following items should be included with your shipment USB 5201 with memory card USB cable 2 meter length External power supply 2 5 watt...

Страница 12: ...port on your computer or to an external USB hub that is connected to your computer The USB cable provides power and communication to the USB 5201 Caution If you are connecting the USB 5201 to an exter...

Страница 13: ...ions are loaded on power up The factory default configuration is Type J thermocouple Warm up Allow the USB 5201 to warm up for 30 minutes before taking measurements This warm up time minimizes thermal...

Страница 14: ...ows on the bottom edge Each row has 26 connections Between each bank of screw terminals are two integrated CJC sensors used for thermocouple measurements Signals are identified in Figure 2 RSVD 1 NC 2...

Страница 15: ...9 DIO7 Digital Input output 24 DIO1 Digital Input output 50 DIO6 Digital Input output 25 DIO2 Digital Input output 51 DIO5 Digital Input output 26 DIO3 Digital Input output 52 DIO4 Digital Input outpu...

Страница 16: ...ing configuration Connect the thermocouple to the USB 5201 using a differential configuration as shown in Figure 3 RSVD NC C H C L NC RSVD C H C L GND RSVD Figure 3 Typical thermocouple connection Con...

Страница 17: ...ital I O and conductive thermocouples the thermocouples are no longer isolated In this case thermocouples must not be connected to any conductive surfaces that may be referenced to earth ground For ge...

Страница 18: ...junction voltage from the analog input s thermocouple voltage measurement Increasing the thermocouple length If you need to increase the length of your thermocouple use the same type of thermocouple...

Страница 19: ...SB cable to a USB port on your computer or to an external USB hub that is connected to your computer When connected to an active USB bus the device s USB connector provides 5 V power and communication...

Страница 20: ...blinks each time data is captured Any logging mode Blinks rapidly 250 ms period and continuously The memory card is full The memory card was removed during logging Insert the memory card again to sto...

Страница 21: ...the device when you remove the USB 5201 when the LED is steady green This information applies to all USB 5201 devices regardless of the firmware version installed Transferring binary data after a log...

Страница 22: ...IN 60 Hz 90 dB min Common mode rejection ratio fIN 50 Hz 60 Hz 100 dB min Resolution 24 bits No missing codes 24 bits Input coupling DC Warm up time 30 minutes min Open thermocouple detect Automatical...

Страница 23: ...n each side of the module The accuracy listed above assumes the screw terminals are at the same temperature as the CJC sensor Errors shown do not include inherent thermocouple error Please contact you...

Страница 24: ...t be connected to any conductive surfaces that may be referenced to earth ground Temperature alarms Table 6 Temperature alarm specifications Number of alarms 8 one per digital I O line Alarm functiona...

Страница 25: ...ave elapsed since power on Note Data logging is not allowed when the device is attached to an active USB bus due to processing limitations The device must be connected to the standalone power supply t...

Страница 26: ...ation Measurement system to PC 500 VDC min AC Adapter Power Supply used for data logging operation Output voltage 5V 5 Output wattage 2 5 W Input voltage 100 240 VAC 50 60 Hz Input current 0 2 A Note...

Страница 27: ...AWG D D USB cable length 3 meters max Environmental Table 14 Environmental specifications Operating temperature range 0 to 70 C Storage temperature range 40 to 85 C Humidity 0 to 90 non condensing Me...

Страница 28: ...RSVD Reserved Do Not Use CJC sensor CJC sensor 11 RSVD Reserved Do Not Use 37 RSVD Reserved Do Not Use 12 NC 38 GND 13 C2H CH2 sensor input 39 C5L CH5 sensor input 14 C2L CH2 sensor input 40 C5H CH5 s...

Страница 29: ...mpatibility EN 61326 1997 Amendment 1 1998 Emissions Group 1 Class A EN 55011 1990 CISPR 11 Radiated and Conducted emissions Immunity EN61326 Annex A IEC 61000 4 2 1995 Electrostatic Discharge immunit...

Страница 30: ...Measurement Computing Corporation 10 Commerce Way Suite 1008 Norton Massachusetts 02766 508 946 5100 Fax 508 946 9500 E mail info mccdaq com www mccdaq com...

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