1769-ARM Address Reserve Module for CompactLogix and MicroLogix
Product Introduction
The 1769-ARM reserves one module slot in a CompactLogix or MicroLogix 1500 system. It uses an inhibited module configuration. Therefore, you can add or replace an inhibited module later without changing the hardware definition. This avoids a full download and keeps the process active. Once you insert the new module, you simply deactivate inhibition.
Technical Specifications
The 1769-ARM draws 60 mA at 5.1V from the backplane. Its maximum heat dissipation is 0.3 Watts. Additionally, the module consumes no output or configuration data files. It only uses a 1‑word input data file.
For power supply compatibility, the 1769-ARM works with 1769-PA2, 1769-PB2, 1769-PA4, and 1769-PB4 units. The power supply distance rating is eight modules. Isolation voltage is 30V continuous.
Specifically, the backplane current is not 1.4A at 24V (that applies to other modules). The 1769-ARM correctly lists 60 mA at 5.1V and 0.3W dissipation.
Mechanical and Environmental Ratings
This module weighs approximately 0.62 lb (0.28 kg). Its dimensions are 118 x 35 x 87 mm (4.65 x 1.38 x 3.43 in.). With mounting tabs, the height reaches 138 mm (5.43 in.).
Operating temperature ranges from 32°F to 140°F (0°C to 60°C). Storage temperature spans -40°F to 185°F (-40°C to 85°C). Relative humidity is 5–95% non‑condensing.
Moreover, the 1769-ARM withstands 5g peak‑to‑peak vibration at 10–500 Hz. Operating shock is 30g for panel mounting and 20g for DIN rail mounting. For non‑operating shock, it handles 40g (panel) or 30g (DIN rail).
Mounting and Installation
You can mount the 1769-ARM on a DIN rail or directly on a panel. Panel mounting offers better resistance to shock and vibration. The module uses the same mechanical locking mechanism as other 1769 CompactLogix units.
First, install the module in an assigned slot. Next, create an I/O configuration with an inhibited module profile. Then, any user program reference to that slot must not use another module’s parameters.
Finally, place the 1769-ARM inside a suitable enclosure. Add heaters or coolers if needed to control temperature. For harsh vibration environments, use shock‑limiting devices.
Packaging List
Shipping via FedEx, UPS, or DHL.
Frequently Asked Questions (FAQ)
1. Can the 1769-ARM work with MicroLogix 1500?
Yes, the 1769-ARM is fully compatible with MicroLogix 1500 controllers in addition to CompactLogix systems.
2. Do I need to download the program again after inserting a new module?
No. Because the 1769-ARM reserves the slot with an inhibited configuration, you simply deactivate inhibition. No download is required.
3. What is the current draw of the 1769-ARM?
It draws 60 mA at 5.1V. This value differs from some general backplane current specs.
4. How many modules can I place away from the power supply?
The power supply distance rating is eight modules. Compatible power supplies include 1769-PA2, 1769-PB2, 1769-PA4, and 1769-PB4.
5. Does the 1769-ARM have output data files?
No. It has a 1‑word input data file only. There are no output or configuration data files.
