B&B Electronics 232CLDR - Datasheet - Manual

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uL rated Current Loop Converter
232CLDR
• Converts RS-232 to 20mA current loop
• 2000V optical isolation protection from transients
• One Transmit current loop & Receive current loop
• Current loops can be set to Active or Passive
• -40 to 80°C operating temperature
proDuCt FeatureS
aCCeSSorieS
MDR-20-24 - DIN rail mount power supply 24VDC, 1.0 A output power
MDR-20-12 - DIN rail mount power supply 12VDC, 1.7 A output power
DRPM25 - 35mm DIN Rail to Panel Mount Bracket, 25mm wide
orDering inFormation
Model
nuMber
serial
ConneCtor
Current looP
ConneCtor
Power sourCe For
serial side
232CLDR Terminal Block Terminal Block External power supply
The 232CLDR is a DIN rail mountable RS-232 to current loop converter. It
is wide temperature rated and UL Recognized for industrial applications. It
has one optically isolated 20 mA transmit loop and one optically isolated
receive loop. Each loop can be set to either “Active” or “Passive.” When set
to “Active” an isolated 20 mA current is supplied for each loop (Transmit
and Receive). One 10 to 30 VDC power supply (not included) provides
power to the converter and both current loops.
The 232CLDR communicates at baud rates up to 19.2 kbps and can extend
communications up to 600 meters (2,000 ft.). 2,000V optical isolation
protects equipment from damaging ground loops and surges. Two LED’s
indicate data flow. Connections are made on terminal blocks.
Current loop explained
Current loop devices use Current On or Current Off to transmit binary digits.
Current loop signals can often transmit over circuits that serial signals can’t
traverse reliably, due to distance, marginal conductors and electrical noise.
Current loop converters from B&B Electronics interface RS-232 or RS-422/485
to the most common current loop ports – 20mA with open circuit voltages up
to 30 V – at a maximum baud rate of 19.2 kbps. High speed optical isolators
couple and isolate Transmit and Receive data. All B&B Electronics’ current loop
converters have a transmit (T+ and T-) loop and a Receive (R+ and R-) loop.
Each loop may be operated as an active or passive loop. When the converter
needs to provide the loop current, a 12 VDC power supply is required for the
current loop side.
Contact B&B Electronics’ Technical Support for information on modifications for
higher loop currents and voltages.
additional reading
Current loop application note
www.bb-elec.com/Currentloop
232CLDR_3713ds