1200DD Series Digital Data Display Manual
1200DD - 2-2
Revision 1.8
Pin #
Name
Description
1
GND
Signal Ground.
2
LTC OUT+ LTC Out + output
3
LTC OUT- LTC Out – output
Figure 2-4: LTC Out Pin Definitions
IRIG B IN
This BNC connector is used to input IRIG B format 122 amplitude modulated time code for the
display.
2.1.2. Ethernet Connections
The 1200DD is designed to be used with either 10Base-T (10 Mbps) or 100Base-TX (100 Mbps) also
known as Fast Ethernet, twisted pair Ethernet cabling systems. When connecting for 10Base-T systems,
category 3, 4, or 5 UTP cable as well as EIA/TIA – 568 100
S TP ca b
for 100Base-TX systems, category 5 UTP cable is required. The cable must be “straight through” with a
RJ-45 connector.
The straight-through RJ-45 cable can be purchased or can be constructed using the pinout information in
Figure 2-5. A colour code wiring table is provided in Figure 2-5 for the current RJ 45 standards (AT&T
258A or EIA/TIA 258B colour coding shown). Also refer to the notes following the table for additional
wiring guide information.
Pin
1
Pin #
Signal
EIA/TIA 568A
AT&T 258A or
EIA/TIA 568B
10BaseT
or 100BaseT
1
Tr
White/Green
White/Orange
X
2
Transmit –
Green/White or White
Orange/White or Orange
X
3
R
White/Orange
White/Green
X
4
N/A
Blue/White or Blue
Blue/White or Blue
Not used (required)
5
N/A
White/Blue
White/Blue
Not used (required)
6
Receive –
Orange/White or Orange
Green/White or Green
X
7
N/A
White/Brown
White/Brown
Not used (required)
8
N/A
Brown/White or Brown
Brown/White or Brown
Not used (required)
Figure 2-5. Standard RJ45 Wiring Colour Codes
Note the following cabling information for this wiring guide:
•
Only two pairs of wires are used in the 8-pin RJ 45 connector to carry Ethernet signals.
•
Even though pins 4, 5, 7 and 8 are not used, it is mandatory that they be present in the cable.
•
10BaseT and 100BaseT use the same pins, a crossover cable made for one will also work with the
other.
•
Pairs may be solid colours and not have a stripe.
•
Category 5 cable must use Category 5 rated connectors.
The maximum cable run between the 1200DD and the supporting hub is 300 ft (90 m). The maximum
combined cable run between any two end points (i.e. 1200DD-GPS and PC/laptop via network hub) is 675
feet (205 m).