Measurement-computing E-1608-OEM Manual do Utilizador descarregar pdf (Página 22)

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

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.

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