Bộ giao diện RS-485 Campbell Scientific MD485

Thương hiệu: Campbell Scientific | Tình trạng: Còn hàng
Liên hệ

MD485 RS-485 Multidrop Interface

Gọi 0904251826 để được trợ giúp

Bộ giao diện RS-485 Campbell Scientific MD485

Overview

The MD485 is an intelligent RS-485 interface that permits a PC to address and communicate with one or more dataloggers over a distance of up to 1200 m. This interface also supports datalogger-to-datalogger communication, callback from a remote datalogger, PC-to-printer communications, and digital camera-to-datalogger connections.

Benefits and Features

  • Compatible with most Campbell Scientific dataloggers

  • Can be used with a phone modem, Ethernet link, or spread spectrum radio to extend the distance between the datalogger and PC

  • Increases the distance allowed between a CC5MPX digital camera and a PakBus datalogger

  • Extends the distance between AVW200 Vibrating-Wire Interfaces for situations where wireless communication is impractical

  • Internal buffering ensures that data is not lost during transmission and allows each side to operate at different baud rates

  • Includes gas tubes on the RS-485 ports and a ground lug for better surge protection

  • Communicates at rates up to 115.2 kbps

Detailed Description

The MD485 includes three ports (RS-232, CS I/O, RS-485) for connecting a PC, a datalogger, or another MD485. Any two ports can be used at a time.

The MD485 can be configured to provide transparent communications, MD9 emulation, and PakBus networking. Although the MD485 can emulate an MD9, the MD485 can not be added to an existing MD9 network. PakBus networking requires the dataloggers to use the PakBus communications protocol. PC400 or LoggerNet software is used to initiate and control the communications link.

Required Equipment

The MD485 is shipped with the 10873 cable and SC12 cable for connecting it to a PC or datalogger. Point-to-point and point-to-multipoint networks use the following equipment:

  1. PC running PC400 or LoggerNet software

  2. At the computer site, an MD485 is connected to the computer via a pn 10873 cable.

  3. At each datalogger site, an MD485 is connected either to the datalogger’s CS I/O port (not compatible with the CR200(X)-series) or the datalogger’s RS-232 port (not compatible with the CR510 or CR10X). The SC12 serial cable connects an MD485 modem to the CS I/O port. The pn 18663 9-pin male to 9-pin male null modem cable connects the MD485 to the RS-232 port.

  4. The CABLE2TP-L Two-Twisted-Pair 22-AWG Cable connects an MD485 to another MD485. Please note that when communicating at maximum distances and high data rates, a cable with polyethylene insulation is recommended.

  5. CR200(X)-series, CR510, CR800, CR850, CR10X, CR1000, or CR3000 datalogger.

  6. Power supply 

  7. Environmental enclosure. At each field site, the datalogger, power supply, and MD485 should be housed in the enclosure if the equipment is not located in a building.

Powering the MD485

AC power is typically used at the computer site; a pn 15966 wall charger is required. At the field site, the MD485 is powered by the datalogger through its CS I/O port. If the MD485 is connected to the datalogger’s RS-232 port instead of the CS I/O port, or if the datalogger was purchased before 12/97, a pn 14291 Field Power Cable is required. Phone-to-MD485 and spread spectrum radio-to-MD485 networks also require a power supply with a null modem port . An A100 adapter used with a PS150 or PS200 power supply provides this capability. The PS150 or PS200 is recharged via a wall charger or a solar panel.

Specifications

Baud Rates

1200, 9600, 19.2k, 38.4k, 57.6k, 115.2k bps

Voltage

12 Vdc (from datalogger or pn 15966 wall charger)

Surge

Complies with IEC61000-4-5, test level 3 (±2 kV, 2 Ω coupling impedance)

Temperature Range

  • -25° to +50°C (standard)

  • -55° to 85°C (extended)

Maximum Cable Length

1,219 m (4,000 ft)

Dimensions

15.88 x 6.35 x 1.91 cm (6.25 x 2.5 x 0.75 in.)

Weight

127.6 g (4.5 oz)

Current Drain

Standby Mode

1.2 mA

Communicating

2 to 7 mA

Power

Standby Mode

14.4 mW

Communicating

24 to 84 mW

ESD

Air Discharge

Complies with IEC61000-4-2, test level 4 (±15 kV)

Contact Discharge

Complies with IEC61000-4-2, test level 4 (±8 kV)

Download

Brochures

MD485 RS-485 Multidrop Interface

Manuals

MD485 RS-485 Multidrop Interface

Compliance

MD485 EU Declaration of Conformity

Sản phẩm đã được thêm vào giỏ hàng

Số lượng:

Tổng tiền:

Sản phẩm đã được thêm vào giỏ hàng

Phí vận chuyển: Tính khi thanh toán

Tổng tiền thanh toán: