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MS7902 Isolation Distributor (Supports HART Protocol via Two In Two Out)
MS7902 Isolation Distributor (Supports HART Protocol) 1. Features 2 in 2 out. Provides distribution voltage to two-wire transmitters. 4-20m isolation
Product details
MS7902 Isolation Distributor (Supports HART protocol through)
1、 Characteristics
2 in 2 out
·Provide distribution voltage for two-wire transmitters
·4-20m isolated transmission
·Support HART signal transmission
2、 Technical specifications
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·Provide isolated power voltage to the two-wire transmitter connected to the site, and isolate and convert the 4-20mA signal generated by the transmitter before transmitting it to the control system or other instruments. ·This product supports HART signal transmission. The isolation distributor is powered by an independent DC power supply, with isolation between the power supply input output. ·Standard 35mm DIN rail card installation. Plug and unplug wiring terminal with spring compression connection. ● Input Input signal: 4~20mA; HART signal Input impedance: 24 Ω Power distribution for transmitter: When 20mA, ≥ 18V (factory default), if larger power distribution is required (such as ≥ 22V), please specify when ordering The maximum input current is about 24mA ● Output Output signal: 4~20mA; HART signal Current output load: ≤ 550Q (factory default) During HART communication, the load resistance RL is ≥ 250Q |
● Power supply Power supply voltage range: 20~30VDC Rated supply voltage: 24VDC Current consumption (when powered by 24VDC): <50mA (1 in 1 out)< 90mA (2 in, 2 out) ● Comprehensive parameters Standard accuracy: ± 0.1% Temperature drift: ± 0.015%/℃ Response time:<10ms Isolation capability: 2.5KV, 1min, 50Hz between input output power supply Insulation resistance: ≥ 100MQ/500VDC between input output power supply Working environment temperature: -20~+60 ℃ Storage environment temperature: -40~+80 ℃ Shell material/protection level: PC (polycarbonate) material/IP20 Dimensions: 16 × 116 × 110 (mm)
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3、 Model selection
4、 Dimensions and installation diagram
● Installation
1.35mm standard DIN rail card installation. Please pay attention to the stability and firmness of the card position during installation.
2. Install vertically as much as possible to facilitate heat dissipation inside the instrument.
● Typical applications
1. Used to provide distribution voltage to on-site transmitters and isolate and convert input signals.
2. Devices connected to the site: Active electrical signals from two-wire or three wire non smart transmitters.
3. Connect to the control system (or other unit combination instruments): The AI card of each DCS/PLC receives current or voltage signals.
● External dimensions
Width (thickness) x height x depth=16 x 116 x 110 (mm)
5、 Terminal wiring diagram
Terminal wiring: Plug and unplug terminal blocks, connected by self boosting spring type compression. The cross-sectional area of the wire shall not exceed 2.5mm2Multiple bundles or single stranded cables.
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