Hardware manual

TVI I300 Hardware Manual © Essential Viewing Systems Limited 2010
Page 10
4.7 Synchronous RS232 – J26
The I300 provides an RS232 port for synchronous serial communications with devices generating
a clock signal via header J26. The following table specifies the mating connector and connector
pins.
J26 – 5x2 JST PHD connector
Description Pin
TxD 1
RxD 2
RTS 3
CTS 4
DCD 5
CLOCK 6
DTR 7
GND 8
<not connected> 9
<not connected> 10
4.8 Ethernet – J27
The I300 provides a 10/100 Base-T Ethernet port for IP communications on header J27. The
following table specifies the mating connector and connector pins.
J24 – 4x2 JST PHDR connector
Description Pin
Pair A +ve 1
Pair A -ve 2
Pair B +ve 3
Pair C +ve 4
Pair C -ve 5
Pair B -ve 6
Pair D +ve 7
Pair D -ve 8
It is recommended that where possible shielded CAT-5E cable is utilised for linking J27 to a
bulkhead RJ45 connector to ensure signal integrity and to avoid EM interference. Where this is
not possible or where linkage to a companion device is internal to an enclosure, twisted pairs
must be used for each of the four Ethernet pairs.
It is imperative that a shielded RJ45 connector be used where the connector is grounded to the
enclosure (chassis ground) to avoid electromagnetic interference.