17
6618-2202
* Railway installation close to the rails.
For a cable located within 3 m and connected to this port, the use of shielded cable is recommended, this is
to minimise the risk of interference. The cable shield should be properly connected (360°) to an earthing point
within 1 m of this port. This earthing point should have a low impedance connection to the conductive enclo-
sure of the apparatus cabinet, or similar, where the unit is built-in. This conductive enclosure should be con-
nected to the earthing system of an installation and may be directly connected to the protective earth.
Generic I/O interface Relay Output
Electrical specification One change over contact
Switching voltage Max 40 V AC/DC
Switching current Max 500 mA AC/DC
Electrical endurancee 5 x 10
5
operations at 20 W / 20 VA Resistive load
Transmission range Cable length ≤ 15 m
Connection Detachable screw terminal (DCE )
Connector size 0.2 – 2.5 mm
2
(AWG 24 – 12)
Isolation to Power port 3 kV
rms 50 Hz 1 min
PSTN line 2 kV
rms 50 Hz 1 min
Leased Line 2 kV
rms 50 Hz 1 min
RS-232 1.5 kV
rms 50 Hz 1 min
RS-485 1.5 kV
rms 50 Hz 1 min
I/O input 2 kV
rms 50 Hz 1 min
Shielded cable Not required*
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