DESCRIPTION
1-6
Document No.: COM-00-05-16 June 2006, Revised June 2014
Version: C.1
1.3.1.3
Pinouts for J3A/J3B
The following table shows the pinouts for J3A and J3B.
Table 1-4.
Pinouts for J3A/J3B
J3A Pin No.
J3B Pin No.
Name
I/O
Signal Description
1
1
TX+
O
Radio Eth Transmit data +
2
2
TX-
O
Radio Eth Transmit data -
3
3
RX+
I
Radio Eth Receive data +
6
6
RX-
I
Radio Eth Receive data -
4, 5
N/C
+12VDC
O
Power for radio
7, 8
N/C
Digital Ground
O
Ground return for radio
1.3.1.4
Pinouts for J4
The following table shows the pinouts for J4.
Table 1-5.
Pinouts for J4
Pin Number
Function
1
TP LAN
– Twisted wire A (not polarity specific)
2
TP LAN
– Twisted wire B (not polarity specific)
3
Not used
4
N
– Battery input – negative terminal
5
Not used
6
B
– Battery input – positive terminal
1.3.1.5
Echelon Interface (J4) Characteristics
•
Data Transfer Rate:
1.25 Mbps
•
Transmission Medium:
Level 4 (NEMA) twisted pair cable, shielded or unshielded, solid or
stranded.
•
Topology:
Bus (direct daisy chain).
•
Number of Nodes:
No more than 8 (including any terminations used) in any 16-meter
(53 feet) length of transmission cable, 16 maximum total per
network segment.
•
Termination:
Normally not needed
•
Network Length:
53 feet (16m) recommended maximum, 426 feet (130m) absolute
maximum per network segment (with certain restrictions).
NOTE
Because of the nature of the Echelon LAN interface, make sure all devices
connected to the LAN are contained entirely within the same signal case or
bungalow.
