Measurement Computing E-1608-OEM - Manual (Page 22)

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Analog input/output calibration
Table 9. Analog input/output calibration specifications
Parameter Specification
Recommended warm-up time 15 minutes min
Calibration method Factory
Calibration interval 1 year (factory calibration)
Digital input/output
Table 10. Digital input/output specifications
Parameter Specification
Digital type 5 V TTL input / advanced BiCMOS output
Number of I/O 8
Configuration Independently configured for input or output
Pull-up configuration
All pins pulled up to 5 V using 47 K resistors (default).
Can be changed to pull-down using an internal jumper.
Digital I/O transfer rate
(system-paced) 100 to 5000 port reads/writes or single bit reads/writes per second typ, on local
network (Note 5)
Alarm functionality
Any combination of DIO bits may be configured to become outputs and go to defined
values when an Ethernet connection with a host is established or lost.
Power on and reset state All bits are input unless the alarm functionality is enabled for them.
Input high voltage threshold 2.0 V min
Input high voltage limit 5.5 V absolute max
Input low voltage threshold 0.8 V max
Input low voltage limit
–0.5 V absolute min
0 V recommended min
Output high voltage
3.8 V typ at no load
3.0 V min (IOH = –3 mA)
2.0 V min (IOH = –32 mA)
Output low voltage
0.15 V typ at no load
0.55 V max (IOL = 64 mA)
Power on and reset state Input
Note 5: This is the typical throughput when the device and host are both connected by Ethernet to the same
local network. The throughput can vary significantly, and typical throughput is not guaranteed if a
wireless connection is involved or data is sent over the internet.