Converts
from RS-232 to RS-485 or RS-422.
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Modes:
RS422 mode: Point to point (2 devices), with two twisted pairs.
RS485 mode: Multidrop on one twisted pair cable,
Simplex: when any device transmits, the
others receive only
IC485S & IC485SN do not have isolation, so are suitable for short
distances..
• In RS485 mode, data transmission direction must be controlled by the
RTS Signal (i.e. not automatic).
For Automatic direction
control see J995X or ADAM-4520
• DCE/DTE Selectable
• Point to Point, Multidrop, and Simplex/Duplex Link Selectable
• Four Wire Full Duplex / Two Wire Half Duplex
• Compact Size
• Monitor Mode on IC-485S
Data transfer can take place at up to 1200 metres over four or two wire cable
for full or half duplex, respectively.
In RS485 (2-wire) mode up to 32 receivers can be set up in a multidrop installation,
making for a cost effective network configuration.
The RS485 side remains in receive mode until switched to transmit mode by Request
to Send (RTS) on the RS232 side.
IC-485S and IC-485SN can obtain power from the RS232 port.
For better line driving capability,
Mains Adaptor is included with IC-485S and IC-485SI, but
not with IC-485SN.
(9VDC, 200mA, with small DC cylindrical plug, 3.5mm dia.,
centre +ve)
IC-485SI (isolated version) requires the mains adaptor to be used.
Warranty: 12 months. ATEN Download
IC-485S Manual: click here (.pdf file)
|
Function |
IC-485S |
IC-485SI Isolated |
IC-485SN | |
| Monitor configuration support | Signal & power isolation | |||
| Connectors | RS-232 DB-25 female | same | same | |
| RS-485
/ RS-422 four terminal block | same | same | ||
| RJ-11 | Grounding
tab (no RJ-11) | RJ-11 | ||
| Switches | SW1 | DCE, DTE, Monitor Mode, see below | DCE, DTE | DCE, DTE |
|
RTS control of transmit | 1.
TxON, RxON Use in point to point mode with two devices only (RS422), or multidrop, with one device only with this setting, and others set to Tx-RTS, RxON (sw position 3) | same | same | |
| 2. Tx-RTS, Rx-notRTS (multidrop mode) | same | same | ||
| 3. Tx-RTS, RxON (multidrop mode) | same | TxDTR/RTS, RxDSR/ON | ||
| Data Rate | Up to 100 Kbps Under 1200m [4000'] | same | same | |
| Cable Length | 1200 m [4000'] (Max.) | same | same | |
| Power Consumption | Can
run without the mains adaptor; mains adaptor gives better line driving capability (DC 9V 200mA, centre +ve, 3.5mm cylindrical plug). Mains adaptor is supplied. | Mains adaptor is provided and must be used. |
Non-powered operation possible. Mains adaptor not included. Power skt is provided for optional power. | |
| Housing | Plastic | same | same | |
| Weight | 60 g | same | same | |
| Dimensions (L x W x H) | 74.5 x 54 x 18.5 mm | same | same | |
|
IC-485S Download IC-485S Manual (.pdf file) |
Not available. |
IC-485SN | ||
| The User Manual has connection
diagram for all modes | ||||
DCE/DTE Switch:
DCE: Data Communication Equipment, pin 3 Tx, pin 5 active
DTE: Data Terminal Equipment, pin
2 Tx, pin 4 active)
pins 2 & 3, and 4 & 5 are reversed by the switch, pin
7 is common
Monitor Mode in IC-485S:
The R+ and R- terminals reflect data to pin 3 of the RS232 port (DB25F)
The T+ and T- terminals reflect data to pin 2 of the RS232 port (DB25F)
The User Manual has connection diagram for all modes.