MD485 RS-485 Multidrop Interface
Temperature Ranges - show details
-ST -ST -25 to +50C
The Standard Temperature Testing range is -25° to +50°C. Individual units are warranted to perform within published specifications over this range, which is included with product purchase.
-XT -XT -55 to +85C
Extended Temperature Testing over the -55° to +85°C range is also available. Individual units are subjected to performance tests at these extremes in a test chamber. Units that pass the tests are certified as extended temperature units.

Please note that manual operation of the "Program" button in MD485s may be compromised at extended low temperatures (-25° to -55°C). The Program button is used only when configuration settings are being manually downloaded to the device from a computer.
Warranty Lengths - show details
-SW -SW Standard 1yr Warranty
At the time of purchase, the MD485 includes a standard warranty of 12 months. See our full warranty policy in the MD485 manual for the terms and conditions of this warranty.
-XW -XW 4yr Warr Extension
Our Extended Warranty adds 48 months to the standard 12 month warranty, bringing the total warranty period to 60 months. The extended warranty may be purchased only at the time of original product purchase. It may NOT be "added later." Except for the increased coverage length, the same terms and conditions apply to the extended warranty as apply to the standard warranty.

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Product Details
Typically Ships Within 14 - 21 Days
Restockable Yes
Warranty 1 year
Compliance CE Compliance Image RoHS Compliance Image

The "Typically Ships Within" value is an estimate of the number of calendar days within which this product is ready to ship from Campbell Scientific. Orders with more than 10 built-to-order products will likely increase the time needed to prepare the order for shipping.

To estimate how long it will take to receive an order that contains multiple products, combine the longest Ships Within value with the transit time of the shipping method you select.

Some specialized products have long Ships Within values. Because of this, you might consider submitting a separate order for these products so your other products won't be delayed.

Ships With
(4) 505 Screw #6-32 x .375 Pan Phillips
(4) 6044 Grommet for #6 or 8 Screw
(1) 10873 Serial Data Cable, 9-Pin Female to 9-Pin Male
(1) SC12 Robust CS I/O Cable, 2 ft

Common Accessories

This ac/dc transformer accepts inputs from 90 to 260 Vac @ 47 to 63 Hz, and then outputs 12 Vdc @ 880 mA for use by the MD485 (typically used at the PC where ac power is available). The 15966 is fitted with a cable and barrel plug to connect the transformer to the MD485; cable length is 6 ft.
Older dataloggers and dataloggers that are using the RS-232 port to communicate with the MD485 require the 14291 Field Power Cable to power the MD485 via the datalogger. The 14291 allows the MD485 to be powered from a suitable 12 Vdc power supply. It terminates in a barrel plug on one end for connection to the MD485 and two pigtails for connection to the 12V and GND terminals on a power supply. The cable has a 2 foot length.
CABLE2TP-L 2 Twisted Pair 22AWG Cable w/Drain
The CABLE2TP-L is used for MD485-to-MD485 connections. It's a 22-AWG, two-twisted-pair cable with a Santoprene jacket and an aluminum Mylar shield. Cable length is user-specified. Lengths between stations can vary with the needs of the application. Campbell Scientific generally recommends a maximum cable length across the network of less than 4000 ft (1300 m). However, a longer cable length may be possible by using addressing and optical isolation within the network. Chapter 8 of the MD485 manual provides some additional information on configuring large MD485 networks. We also recommend that you consult an applications engineer for assistance in configuring a network of this type.
CABLE2TP-L Options - show details
-L ft per cable

Allowed values: 1-1000 ft, increments of 1 ft

Cable Termination Options - show details
-PT -PT w/Tinned Wires
With the -PT option, the cable terminates in pigtails that connect directly to the datalogger.
-PW -PW w/Pre-Wire Connector
Choose this option if you are using this cable with a prewired enclosure.
If not ordering the datalogger on the same order, you might need this small, flat-bladed screwdriver. The 8125 is extremely useful for opening the guillotine terminals on this interface. The blade is 2.5 mm across and the untapered shaft length is 50 mm. The handle has an approximate length of 9 cm, and features a rotating end-cap that makes the screwdriver easy to rotate.

Other Accessories

This null modem cable can be used to connect the MD485 to the datalogger's RS-232 port.

Replacement Parts

The 7845 is a green RS-485 connector. Two 7845 connectors are attached to every MD485 that leaves the factory.
The 10873 is a serial cable that is useful for connecting the RS-232 port of the datalogger to the 9-pin RS-232 port of a computer. The cable is six feet long.
These screws, along with the 6044 grommets, are commonly used together to secure our equipment to the backplates of our enclosures.
These grommets are commonly used with the 505 screws to secure our equipment to the backplates of our enclosures.