Reporting of Analog Values to a WS3500 for scaling and alarming via SNMP or TL-1 - see WS3500 Product Info.

Reporting of threshold crossings via TBOS to any concentration device that supports the TBOS protocol.

8 Analog inputs per WS-ARM/1, can be daisy chained together on RS-485 serial channel.

The WS-ARM/1 is a free-standing remote alarm monitoring unit that collects raw analog values, and reports to a concentration device for scaling and alarm presentation. It was designed to collect critical power data to provide a practical solution to monitoring and managing DC power systems, but can also be used for other applications in a telecommunications facility.

Designed to meet Network Equipment Building Standards (NEBS) Level 3 testing requirements, the WS-ARM/1 augments the WS3500 Remote Terminal Unit (RTU) by adding an economically priced product to collect analog data.

Each WS-ARM/1 can collect data from up to eight analog inputs and up to four temperature and humidity sensors. Two (2) inputs are fixed 0 to -60VDC that will typically be used to monitor battery voltage, while the remaining six (6) inputs are able to interface to any Industry Standard Architecture (ISA) transducer that supports 4 - 20mA or bipolar 100mV. In addition to the power system parameters, this also allows users to measure analog values for other input types such as temperature, humidity, pressure, and dangerous gas concentrations.

The ARM/1 can be wall or shelf mounted, close to the equipment being monitoring. This simplifies installation by reducing the amount of wiring that would otherwise be required, and also minimizes the voltage drop and induced noise from long wiring runs. The unit is powered with -48VDC @ 1.7W with no load on the inputs.

The WS-ARM/1 uses a subset of the Distributed Network Protocol (DNP3) over either an RS-232 or RS-485 serial connection. When using RS-485, the unit can be multi-dropped with up to 4 remotes on a WS3500 serial port. Discrete reporting of threshold crossings via TBOS is also supported.