Actisense USG-1-B-485 Manual de usuario descargar pdf (Pagina 15)

USB to Serial Gateway - USG-1-B-422

Specications

The USG-1 ISO-Drive output is a very exible output that is RS485, RS232, RS422 and NMEA 0183 compatible.

Parameter Conditions Min. Max. Unit

Supply

Supply voltage From USB port 4.75 5.25 V

Supply current drawn from USB port

Supply voltage = 5v (no load) 40 46 mA

Supply voltage = 5v (output shorted) 75 80 mA

Opto-isolated Flexible Input

Input voltage between +/-

Logical ‘1’ -15.0 0.5 V

Logical ‘0’ 4.0 15.0 V

Input current

Maximum is under +35v overload

condition, min @2.0v input level

2.0 9.0 mA

Differential input voltage

Required level for NMEA to be

detected from a connected talker

1.8 2.0 V

Galvanic isolation Between input & output 2500 V

Overdrive protection 40 V

ISO-Drive Flexible Output

Output voltage between + and - (under no

load)

Logical ‘1’ -4.8 -5.2 V

Logical ‘0’ 4.8 5.2 V

Output current at max load of 100 ohm

At maximum load, differential drive

voltage reduces to 12.1v

- 21 mA

Output short circuit current (note 1) Due to short circuit protection 50 55 mA

Galvanic isolation From Opto-input and (USB) ground 1500 V

Static discharge protection

PC Communication settings

Baud rate

Both input & output Baud rates are set

by the PC software settings

4800 115200 bps

General

Ambient operating temperature -20 +70 °C

Table 2 – USG-1 specications

All specications are taken with reference to an ambient temperature (T

) of +25°C.

Note:

1. Short circuit may be applied indenitely. The ISO-Drive output may be short-circuited directly to a 30 volt battery

supply without damage. A maximum current of 50mA will ow due to “polyfuse” auto-resetting fuse technology

being used in each output.

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Actisense USG-1-B-485 Manual de usuario Pagina 15

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