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OM-USB-1208HS Series User's Guide 

Specifications 

21 

Power 

Table 12. Power specifications 

Parameter 

Condition 

Specification 

Operating modes 

 

Bus-powered, USB 5 V supply 

Supply current 
(see Note 1) 

Suspend mode 

<2.5 mA 

Enumeration 

<100 mA 

Run mode 

<500 mA 

Power consumption 
excluding analog and 
digital outputs 

Run mode 

OM-USB-1208HS:  

1.05 W max (210 mA input current) 

OM-USB-1208HS-2AO:  

1.125 W max (225 mA input current) 

OM-USB-1208HS-4AO:  

1.175 W max (235 mA input current) 

Power available for +5 V, 
AICKO, AOCKO, TMR, 
analog outputs, and 
digital I/O 

Run mode 

OM-USB-1208HS:  

1.45 W max 

OM-USB-1208HS-2AO:  

1.375 W max 

OM-USB-1208HS-4AO: 1.325 W max 
The total power consumption for all external loads must be less than this 
value, and each load must meet the individual specification for the 
terminal. 

Digital output power 
calculation 

 

Power per output = Iout × 5 V  
(for example, @ 24 mA, P = 0.024 × 5 = 120 mW / output) 

Analog output power 
calculation  
(OM-USB-1208HS-2AO/  
OM-USB-1208HS-4AO) 

 

Power per output = (Iout × 16.5 V) / 0.78  
(for example, @ 3 mA, P = (0.003 × 16.5) / 0.80 = 63.5 mW/output) 

+5 V output power 
calculation 

 

Power (W) = Iout × 5 V 

+5 V output voltage 
range (see Note 2) 

Run mode 

4.25 V min, 5.25 V max 

Suspend mode, 
enumeration 

0 V 

+5 V output current 

Run mode, no 
other output loads 

OM-USB-1208HS:  

290 mA max (1.45 W) 

OM-USB-1208HS-2AO:  

275 mA max (1.375 W) 

OM-USB-1208HS-4AO: 265 mA max (1.325 W) 

Fuses 

On USB supply  

0452.750 - Littelfuse 0.750A NANO2® Slo-Blo®

 Subminiature Surface 

Mount Fuse. 
Spare fuse mounted in holder on PCB. 

Note 1:  

This is the total current consumption for OM-USB-1208HS Series hardware, inc5 V, digital 
output and analog output currents (if supported). 

Note 2:  

Output voltage range assumes input power is within specified limits. 

USB specifications 

Table 13. USB specifications 

Parameter 

Specification 

USB device type 

USB 2.0 (high-speed) 

USB device compatibility 

USB 1.1, 2.0 

USB cable length 

5 m (16.40 ft)  max 

USB cable type 

A-B cable, UL type AWM 2725 or equivalent (min 24 AWG VBUS/GND,  
min 28 AWG D+/D–). 

Содержание OM-USB-1208HS Series

Страница 1: ......

Страница 2: ...6 USA Canada only Tel 203 359 1660 Fax 203 359 7700 e mail info omega com For Other Locations Visit omega com worldwide omega com info omega com The information contained in this document is believed...

Страница 3: ...OM USB 1208HS Series Device 9 Chapter 3 Functional Details 10 Analog input acquisition modes 10 Software paced mode 10 Hardware paced mode 10 External components 10 USB connector 10 LEDs 10 Screw term...

Страница 4: ...OM USB 1208HS Series User s Guide 4 Mechanical 22 Screw terminal connector and pinout 22...

Страница 5: ...ements present information to help you avoid injuring yourself and others damaging your hardware or losing your data bold text Bold text is used for the names of objects on a screen such as buttons te...

Страница 6: ...orts although the speed of the module maybe limited when using USB 1 1 ports Each OM USB 1208HS Series device provides the following features 8 single ended SE or four differential DIFF analog input c...

Страница 7: ...the block diagram shown here Figure 1 Functional block diagram Software features For information on the features of InstaCal and the other software included with your OM USB 1208HS Series hardware ref...

Страница 8: ...on installing the software on the Software for OMB DAQ 2400 OM USB OM WEB and OM WLS Series Data Acquisition Modules CD This booklet is available in PDF at http www omega com manuals manualpdf M4803 p...

Страница 9: ...e To restore communication disconnect the USB cable from the computer and then reconnect it This should restore communication and the LED should turn on Calibrating a OM USB 1208HS Series Device OM US...

Страница 10: ...alues and written to an onboard FIFO buffer on the device until you stop the scan The FIFO buffer is serviced in blocks as the data is transferred from the device FIFO buffer to the memory buffer on y...

Страница 11: ...nnections AGND Six digital ground connections GND One external clock input AICKI and one external clock output AICKO for analog inputs One external clock input AOCKI and one external clock output AOCK...

Страница 12: ...FF inputs to screw terminals AIN0 AIN0 to AIN3 AIN3 Refer to Figure 4 for the location of these pins DIFF mode requires two wires plus a ground reference Connect one wire to the high positive signal A...

Страница 13: ...guration is pull down You can use the digital I O terminals to detect the state of any TTL level input Refer to the schematic shown in Figure 5 Figure 5 Schematic showing switch detection by digital c...

Страница 14: ...M4830 pdf Counter I O The terminals provide connections to each 32 bit counter input channel CTR0 and CTR1 Each counter can count frequencies of up to 20 MHz Refer to Figure 3 on page 11 for the locat...

Страница 15: ...e trigger settings for positive edge negative edge and level sensitive edge sensitive but automatically re arms the trigger after it is activated Power outputs You can use the two 5V connections to su...

Страница 16: ...lectable range for each channel Absolute maximum input voltage CHx IN to GND 25 V max power on 12 V max power off Input impedance 35 M min Input bandwidth 3 dB All input ranges 2 MHz typ Input leakage...

Страница 17: ...hardware Noise distribution is determined by gathering 50 kS with inputs tied to ground at the user connector Samples are gathered at the maximum specified sampling rate of 1 MS s Table 3 Noise perfo...

Страница 18: ...DC Power up and reset state 0 V Output noise 0 53 mV rms Settling time to 0 05 20 V output step RL 5 k CL 200 pf 5 S max Absolute accuracy 0 1 Slew rate 6 7 V s typ Offset error drift 10 ppm C typ Gai...

Страница 19: ...S AICKI AICKO OM USB 1208HS 2AO AICKI AICKO AOCKI AOCKO OM USB 1208HS 4AO AICKI AICKO AOCKI AOCKO Terminal types AxCKI Input active on rising edge AxCKO Output power on default is 0 V active on rising...

Страница 20: ...le 10 Timer specifications Parameter Specification Timer terminal name TMR Timer type PWM output with count period delay and pulse width registers Output value Default state is idle low with pulses hi...

Страница 21: ...t Analog output power calculation OM USB 1208HS 2AO OM USB 1208HS 4AO Power per output Iout 16 5 V 0 78 for example 3 mA P 0 003 16 5 0 80 63 5 mW output 5 V output power calculation Power W Iout 5 V...

Страница 22: ...pecifications Parameter Specification Connector type Screw terminal Wire gauge range 16 AWG to 30 AWG Table 17 Single ended mode pinout Pin Signal name Pin Signal name 1 AIN0 29 AOUT01 2 AGND 30 AOUT1...

Страница 23: ...5 AIN1 33 AOUT32 6 AGND 34 AGND 7 AIN1 35 AICKI 8 AGND 36 AICKO 9 AIN2 37 AOCKI3 10 AGND 38 AOCKO3 11 AIN2 39 TRIG 12 AGND 40 GND 13 AIN3 41 CTR0 14 AGND 42 CTR1 15 AIN3 43 TMR 16 AGND 44 GND 17 empty...

Страница 24: ...y OMEGA if the unit is found to be defective it will be repaired or replaced at no charge OMEGA s WARRANTY does not apply to defects resulting from any action of the purchaser including but not limite...

Страница 25: ...ity Indicators Turbine Paddlewheel Systems Totalizers Batch Controllers pH CONDUCTIVITY pH Electrodes Testers Accessories Benchtop Laboratory Meters Controllers Calibrators Simulators Pumps Industrial...

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