Westermo RV-07B - Manual (Page 9)

9 6130-2200
RV-07B with TR-36B
RS-422/485*
Electrical specification EIA RS-485
2-wire or 4-wire twisted pair
Data rate 300 bit/s to 115.2 kbit/s
Data format 7 or 8 data bits, Odd, even or none parity, 1 or 2 stop bits,
9-12 bits
Protocol Transparent
Retiming Yes
Turn around time <10 μs (half duplex)
Circuit type TNV-1
Transmission range
≤ 1200 m, depending on data rate and cable type (EIA RS-485)
Settings 120 Ω termination and failsafe biasing 680 Ω
Protection Installation Fault Tolerant (up to ±60 V)
Isolation to Power port 3kV rms 50 Hz 1 min
PSTN line 2kV rms 50 Hz 1 min
Leased line 2kV rms 50 Hz 1 min
RS-232 2kV rms 50 Hz 1 min
Connection Screw connector
Connector size 0.2 – 2.5 mm 2 (AWG 24 – 12)
Shielded cable Not required
RS-232*
Electrical specification
EIA RS-232
Data rate 300 bit/s to 115.2 kbit/s
Data format 7 or 8 data bits, Odd, even or none parity, 1 or 2 stop bits,
9-12 bits
Protocol Transparent
Retiming Yes
Circuit type SELV
Transmission range Cable length <15 m
Isolation to Power port 3kV rms 50 Hz 1 min
PSTN line 2kV rms 50 Hz 1 min
Leased line 2kV rms 50 Hz 1 min
RS-422/485 2kV rms 50 Hz 1 min
Connection 9-pin D-sub female (DCE)
Shielded cable Not required
Conductive housing Isolated to all other circuits
Miscellaneous Do not connect RS-232 and RS-422/485 simultaneously
* To minimise the risk of interference, a shielded cable is recommended when the cable is located inside 3 m
boundary to the rails and connected to this port.
The cable shield should be properly connected (360°) to an earthing point within 1 m from this port. This earth-
ing point should have a low impedance connection to the conductive enclosure of the apparatus cabinet, or
similar, where the unit is built-in. This conductive enclosure should be connected to the earthing system of an
installation and may be directly connected to the protective earth.