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TEK-AIR FLOWMETER - SLI-N2 SERIES - CONVERTER - SMARTLAB SYSTEM

 

The design of the Lab Interface Converter (SLI/N2) provides a true communications protocol converter.There are two ports for connecting the converter. The signals are isolated, and the communications protocol is converted from one side to the other in a bi-directional fashion. The controllers within the lab are connected to the ARCnet side, while the N2 side connects to the Johnson Controls N2 network. The Johnson Controls N2 trunk connects all of the SLI/N2 units to one another and to the Front End Computer. Due to the isolation provided by each SLI/N2 to its respective lab, if there is a failure in the lab network, the main network remains unaffected. Conversely, if there is a failure in the main network, the lab remains unaffected.
The SLI/N2 is always considered to be the last unit on the ARCnet network, therefor terminating resistors for the ARCnet port are provided internally. There is no internal termination resistor installed in the N2 port because this port is not the last unit in the N2 network.

Tek-Air SLI-N2

 

Applications
The SLI-N2 is included in each lab in the SmartLab network, and provides a point of connection for technicians using a computer to configure the lab controls. The SLI-N2 converter also provides isolation between the lab network it serves and the main N2 network trunk.

.The SLI/N2 is designed solely for use in Tek-Air’s SmartLab Control Systems. Typically, one SLI/N2 is included in each lab in the SmartLab network, and provides a point of connection for technicians using a computer to configure the lab controls. The SLI/N2 converter also provides isolation between the lab network it serves and the main N2 network trunk. In addition, the SLI/N2 houses a temperature sensor that can connect directly to a SmartLab Controller input for measurement of lab temperature.

 

SPECIFICATION OF SLI-N2 SERIES :

Power ..............................................................24 VAC +1- 10%, 2VA
Communications Ports:
1 RS485 9600 Baud, bi-directional, with 3-wire connection terminals
1 ARCnet 625 kBaud, bi-directional, with 3-wire connection terminals
SmartLab System Access
1-3 pin D female; automatic insertion into network
Termination
ARCnet Port: 120 ohm internal
N2 Port: none
Thermistor
Internally mounted, 10,000 ohm type III, 2-wire connection terminal
Visual Indicators (under front cover)
Red LED: Power
Green LED: N2 communications
Yellow LED: ARCnet communications
Controller and Point Capacity
25 Controllers Maximum: Any combination of SLC2000 and FVC2000 Controllers.
SmartLab N2 Points per Controller (user definable):
6 analog read points
2 binary read points
3 analog read/write points
2 binary read/write points
Fume Hood N2 Points per Controller (device specific)
4 analog read points
2 binary read points
5 analog read/write points
2 binary read/write points

 

 

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