Netcom ASM-1 Automated Air Distribution Manifold

Part Number: ETI-NETCOM-ASM-1 Category Brand:

Netcom ASM-1 Automated Air Distribution Manifold

The ASM–1 Smart Manifold automated air manifold distributes low pressure dry air from one or more sources to one or more transmission lines. Output pressure is configurable between 0.10 psig and 7.50 psig (7mbar – 517mbar) in 0.01 psig (0.67mbar) increments. Factory default pressure is 0.5 psig (34.5mbar). Operational monitoring and alarms are software based making them highly configurable in the field. Future software features can be installed while in service over the internet or local Ethernet network.


  • Keep waveguide and coax dry
  • Distributes dry low pressure air from one or more sources to one or more transmission lines
  • Continuous system monitoring allows leaking lines to be isolated while the rest of the system remains pressurized
  • Periodic automated line testing can identify future line leaks for planning maintenance before critical failures
  • Highly configurable to meet the needs of wide ranging applications Programmable operating pressure range: 0.10 psig - 7.50 psig (7mbar - 517mbar)
  • Programmable pressure relief valve to bleed off excess system pressure common with high solar gains
  • Future-proof software based features allow updates and upgrades while in service
  • Remote monitoring and control with web interface or SNMP
  • Configurable Parallel Pumping operation combines multiple ADH NETCOM dehydrators for increased system capacity
  • Configurable Redundant Pumping operation combines multiple ADH
  • NETCOM dehydrators for increased system reliability
  • Ethernet, RS-422/485, RS-232 and alarm relay outputs for compatibility with nearly any system
  • Simple power connections for 100-240 VAC or ±20-75 VDC
Dimensions 17" × 12" × 5-1/4" (432mm × 305mm × 133mm)
Weight 11 lbs (5kg)
Mounting Dual-post rack, flush mounted Single-post rack, center mounted Wall mounted
Supply voltage 100-240 VAC, 50/60 Hz | ±20-75 VDC
Weight 1.0 Amps at 100 V
Mounting 60 W max
Heat dissipation 205 BTU/hr max
Maximum pressure 7.5 psig (517mbar)
Pressure relief valve 8 psig (522mbar)
Display units SI (milibars); English(psig), default
Ports 8 x 1/8 NPT(2 input, 5 outlet and pressure relief valve default) 3/8” or ¼” hose barbs(both included)
Protocols HTTP(Web Interfaces), SNMP, UDP, TFTP
Maximum Pressure Configurable Range: 0.20 psig – 7.5 psig(14mbar - 517mbar), Default: 0.50 psig (34.5mbar)
Minimum Pressure Configurable Range: 0.10 psig - 7.4 psig (7mbar - 510mbar), Default: 0.30 psig (21mbar)
Low pressure alarm level User Configurable, Default: 0.15 psig (10mbar
High pressure alarm level User Configurable, Default: 1.5 psig (103.5mbar)
Alarm relays Contact Type - Form C, SPDT, reverse acting Ratings - 0.25 Amps @ 60 V User Configurable, Defaults - Alarm Relay 1: Summary Alarm, Alarm Relay 2: Low Pressure Alarm, Alarm Relay 3: Over Pressure Alarm User Configurable, Default: 50% User Configurable, Default: Standard/Slave
Parallel pumping configuration User configurable, Default: Off
Redundant pumping User configurable, Default: Off

An RCD Passive Dehydrator, such as the RCD-1, contains a drying agent sealed in a pressure tight container. A 1/8" NPT pressure fitting is provided for connecting it to the system to be protected. Gas diffusion insures that the desiccant is exposed to any water vapor present in the system. Unlike mechanically pressurized systems, an RCD passive dehydrator works best when the waveguide or coax system is tightly sealed.

Containing just one moving part, an RCD Self-Pumping™ Passive Dehydrator, such as the RCD-2, uses variations in ambient temperature and barometric pressure to pressurize the waveguide or coaxial cable. When the pressure inside the waveguide is less than atmospheric, a sensitive check-valve in bottom of the bottle opens. This allows ambient air to enter the Waveguide or coax after it has passed through and been dried by the desiccant. When the internal pressure exceeds atmospheric pressure, the check-valve closes, thus holding the system at a positive pressure.

This feature improves performance in two ways. First, it increases drying DESCRIPTION efficiency by keeping the system at a positive pressure: generally, dry air leaking out rather than moist air leaking in. Second, this feature insures controlled dry air circulation in the waveguide or coaxial cable. When compared to a passive dehydrator that relies upon gas diffusion, such as the RCD-1, the RCD-2 Self-Pumping Passive Dehydrator’s circulation dramatically improves response to environmental changes.

Depending upon the system volume and tightness, as well as the environmental conditions at the site, the desiccant lasts 12 to 18 months, or longer, before requiring regeneration or replacement. Conditions such as a leaky system and damp climate may reduce desiccant longevity.

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