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NetGuardian 864A DX G5: Overview

NetGuardian DX G5 Expansion Unit

The NetGuardian 864A DX G5 Expansion Units are low-cost, self-contained devices that provide compatible NetGuardian-series remotes with additional alarms and controls. With the DX expansions, your NetGuardian RTU can scale to the needs of your remote site, so you don't have to deploy new RTUs as your needs grow. Adding up to 3 864A DX expansion units to your compatible NetGuardian RTU will increase your capacity by 192 discrete points, 24 analog inputs, and 24 control relays.

NetGuardian 864A G5 DX Application Drawing (See how it works!)

NetGuardian 864 DX

Each unit is equipped with dual RS232 ports for easy installation and daisy-chaining. Here are the benefits you will enjoy by deploying the 864 DX:

  • Low cost method of expansion to existing NetGuardian units.
  • Gives additional capacity over existing communication lines.
  • Report more alarms from the same address.
  • Expand at your own pace.
  • RS232 ports allow for easy daisy chaining between units.
  • LED indications of alarms and communications status.

Video review of the similar 832A DX (32 discretes instead of 64):

When compared to the 864A DX, the 832A DX increases your discrete alarms in increments of 32 instead of 64. The 832A/864A DX features 8 analog inputs and 8 control outputs (relay contacts).

The 864A DX is usually priced higher than the 832A DX, due to its larger discrete alarm capacity, unless you require additional features. For an additional cost, DPS can add these custom features you need to meet or exceed your needs.


The NetGuardian 864A DX G5 is compatible with the NetGuardian 832A G5. Likewise, the 832A DX G5 is compatible with the 864A G5. So if you expand your base 864A or 832A unit with an 832A DX expansion unit, you can increase your capacity with a minimum of 32 discrete alarms and 8 analog alarms. You can also maximize your discrete alarms by an additional 192 by deploying up to three 864A DXs.

Please note that these two NetGuardian expansion units are not compatible with all NetGuardian RTUs. To find out which NetGuardian RTUs are compatible, call 1-800-693-0351 or 559-454-1600 to speak with our Sales Engineers or Tech Support team.

Here are some additional links with more information on the expansion units and T/Mon master stations.

NetGuardian 832 & 864 DX G5: Expand Your Alarm Point Coverage

New Expansion DX 64

Products: T/Mon Options

Full Specifications

NetGuardian 864A DX G5 Expansion Unit Back Panel

Up to three NetGuardian DX Expansion Units can be added to a compatible NetGuardian RTU, providing 192 additional alarm points, 24 analog inputs, and 24 control relays.

Find temperature, humidity, and many other
discrete and analog sensors for your DPS RTUs.

Full Specifications:

Discrete Inputs: 64
Analog Inputs: (Optional) 8
Control Outputs: (Optional) 8 Relay contacts
Maximum Voltage: 60 VDC/120 VAC
Maximum Current: 1 Amp, AC/DC
Protocol: DCPX

1 DB9 Craft Connector 1 RJ45 Connector for RS232
1 RJ12 Connector for RS232
2 50 Pin connectors for discrete alarms, controls, and analogs 1-6
1 4-pin connector for analogs 7-8

Power Input:

-48VDC (-40 to -70VDC)
(Optional) Wide range (-18 to -72VDC)

Current Draw: 250mA
Fuse: 3/4 Amp GMT
Mounting: 19" or 23" rack
Dimensions: 1.72" H x 17" W x 9.636" D
Weight: 3 lbs. 15 oz. (1.8 kg)
Operating Temperature: 41-95 F (0-60 C)
Operating Humidity: 0%-95% non-condensing