| SERIAL HOST | RS-232-C / RS-422-A | 1770-KF2 | DH / DH+ | PLC NETWORK |
The 1770-KF2 links an asynchronous host device to an Allen-Bradley Data Highway or Data Highway Plus network. Its configurable serial side and network dropline support legacy programming, supervisory and communication duties.
| Manufacturer | Allen-Bradley |
| Catalog number | 1770-KF2 |
| Network side | Data Highway or Data Highway Plus |
| Host side | RS-232-C or RS-422-A |
| Maximum communication rate | 19.2 kbps |
| Power input | 115 / 230 V AC selectable |
| AC current draw | 0.30 A at 115 / 230 V AC |
| Maximum baud rate | 19.2 kbps |
| Asynchronous connector | 25-pin, RS-232-C / RS-422-A compatible |
| Network connection | DH or DH+ dropline |
| Operating temperature | 0 to 45 deg C |
| Relative humidity | 10 to 80%, noncondensing |
| Configuration focus | Network address, baud, parity, duplex and checking |
| Installation role | Panel-mounted communication interface |
| HOST COMPUTER / TERMINAL | → | RS-232-C OR RS-422-A | → | 1770-KF2 | → | DH OR DH+ DROP | → | PLC / NETWORK STATIONS |
| MODEL | ROLE | SELECTION POINT |
| 1770-KF2 | DH or DH+ to serial | This model; externally powered |
| 1785-KE | DH+ communication interface | Confirm host and network arrangement |
| 1784-KL | Programming-terminal DH+ interface | Different host hardware |
| 1784-KT / KT2 | Computer interface card | Requires compatible computer slot |
| 01 | Select the correct AC input setting before energizing the unit. |
| 02 | Confirm DH versus DH+ operation, station address and network rate before connection. |
| 03 | Build and verify the 25-pin host cable for the chosen RS-232-C or RS-422-A signals. |
| 04 | Route serial and network cables away from power conductors and terminate the network correctly. |
| 05 | After replacement, verify host settings, node address, message transfer and network health. |
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QUALITY-FOCUSED SUPPLY
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URGENT INTERNATIONAL DISPATCH
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EXPERIENCED PART SUPPORT
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| 01 |
1770-KF2: Can 1770-KF2 connect directly to Ethernet?
No. Its network side is Data Highway or Data Highway Plus and its host side is asynchronous serial.
|
| 02 |
1770-KF2: Can 1770-KF2 use both RS-232-C and RS-422-A at once?
Select and wire the asynchronous interface required by the host; do not treat the two electrical modes as simultaneous ports.
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| 03 |
1770-KF2: What must match when replacing 1770-KF2?
Match the network type, station address, baud rate, serial mode, duplex selection, error checking and cable pinout.
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| 04 |
1770-KF2: Why can a correctly powered 1770-KF2 still fail to communicate?
Typical causes include a duplicate station address, wrong DH/DH+ choice, mismatched serial framing, incorrect cable wiring or network termination.
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| 05 |
1770-KF2: Is 1770-KF2 a transparent substitute for every DH+ interface?
No. The host connection, driver support, enclosure wiring and required message behavior must be checked before substitution.
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