Installation manual
Page 8© 2009 Active Research Limited
Specications
Parameter Conditions Min. Max. Unit
Supply
Supply voltage 8 35 V
Supply current (see note 1)
Supply voltage = 12v 26 30 mA
Supply voltage = 24v 16 18 mA
NMEA 2000 CAN Bus line (CAN-H; CAN-L) Transmitter
Recessive bus voltage VTXD = VDD; no load. 2.0 3.0 V
Dominant bus voltage CAN-H VTXD = 0.8V 2.75 4.5 V
Dominant bus voltage CAN-L VTXD = 0.8V 0.5 2.25 V
Recessive differential output voltage VTXD = 2V; no load -500 50 mV
Dominant differential output voltage 40Ω < RL < 60Ω 1.5 3.0 V
Short circuit output current CAN-H VCAN-H = -5V - -200 mA
Short circuit output current CAN-L VCAN-H = -40V, +40V. (see note 2) - 200 mA
NMEA 2000 CAN Bus line (CAN-H; CAN-L) Receiver
CAN-H, CAN-L common-mode input
Resistance
5 50 KΩ
Differential input resistance 20 100 KΩ
USB Comms Input/Output
Input to Ground Full Galvanic Opto-isolation protection - 2500 V
Baud rate Congurable Baud rate 4800 230400 bps
General
Ambient operating temperature -20 +70 °C
Table 2 – NGT-1-USB specications
All specications are taken with reference to an ambient temperature (T
A
) of +25°C.
Note:
1. Current consumption measured under no-load conditions
2. This parameter is periodically sampled and not 100% tested.