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INTRODUCTION |
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The CVT-485_422-3 is an
optically isolated RS-232 to RS-485 / RS-232 to RS-422
converter, which can be used to convert any standard RS-232C
port into a two-wire half-duplex RS-485 port or a four-wire
full-duplex RS-422 port and vice versa. This product features
opto-isolation circuitry, which effectively protect your RS-232
devices from transient surges, ground loop, and remote
lightning. The unit is powered from the RS-232 data line; it
also supports data direction auto-turnaround. Therefore, no
external power or flow control is required.
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$89.95 |
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spec sheet |
FAQ |
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FEATURES |
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Optical isolation effectively protects RS-232 devices from
transient surges, ground loop, and remote lightning. |
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Optical isolation eliminates ground loop and noise problems. |
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Plug and play (hot-pluggable, data format auto-sensing &
self-adjusting). |
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Port-powered, no external power or RTS, DTR required. |
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Data direction auto-turnaround, no flow control is required. |
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SMT Circuit. |
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Built-in Terminating Resistor (120Ω). |
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Built-in Static protection circuit. |
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Built-in Short circuit protection
(RS485/RS422 data line). |
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SPECIFICATIONS |
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Compatibility: |
EIA/TIA
RS-232C standard and RS-485/RS-422 standard |
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Power Source: |
Port power
from RS232 data line |
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Current
Consumption: |
Under 10mA |
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Optical
Isolation: |
2000V |
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Baud Rates: |
300
to 19,200bps (auto-sensing & self-adjusting) |
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Distance: |
RS-232 side:
16 ft (5m); RS-485/RS-422 side: Depending on
power from RS232 port, will transmit up to 4000 ft (1.2km) at
19,200bps |
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Connector: |
RS232 Side:
DB-9 Female; RS485/RS422 Side: DB-9 Male; Termination Board: DB-9
Female and a 6-Way Terminal Block |
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Maximum number
of drops: |
64 |
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End of Line
Terminator: |
120Ω
(Built-in) |
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Static
protection (ESD): |
Up to 15KV |
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Dimensions (H
x W x D): |
0.63 x 1.3
x 3.5 in (16 x 32 x
90 mm) |
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Weight: |
1.37 oz (39 g) |
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Operating
Temperature: |
-4ºF to
158ºF (-20ºC to
70ºC) |
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Operating
Humidity: |
Up to 90%
RH (no condensation) |
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CONNECTIONS |
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Figure 1: Master-Slave
Multi-Drop Connections (RS485) |
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Figure 2: Master-Slave
Multi-Drop Connections (RS422)
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