ADLINK ND-6067 - Manual (Page 71)

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4.2 Overview of ND-6024
ND-6024 is a 4 channel bipolar analog signal output module. It receives the
digital command from host computer through RS-485 network. A
microprocessor is used to convert the digital command to digital value to send to
DAC. The DAC converts the digital value into analog form.
The ND-6024 is designed for safety. It provides many safety functions such as
isolation, watchdog, and power on safe value. The opto-isolators provide
5000Vrms isolation voltage to isolate the digital section and the remote
controlled analog equipments. The damage of power surges is avoided.
Another safety fucntion is the watchdog. Whenever the host is loss contact with
the remoted NuDAM module, or the micro-processor is down, the module will
reset itself and send the safety value to the analog output therefore the industry
safety is guarantee. The safety value/power-up value can be set by
configuration software.
4.2.1 Features of ND-6024
z 4 channel bipolar analog output
z Programmable host watchdog timer for host failure protection
z Internal watchdog timer for device failure protection
z Easy programming by software
z Easy installation and wiring
4.2.2 Specifications of ND-6024
‹ Interface
♦
Interface : RS-485, 2 wires
♦
Speed (bps) : 1200, 2400, 4800, 9600, 19.2K, 38.4K, 57.6K, 115.2K
‹ Analog Output
♦
Channel number : 4
♦
Singal Output type: Differential output