Echelon PCLTA Network Interface - Manual (Page 19)

PCC/PCLTA Network Interfaces User's Guide 11
Network Connector
The PCLTA-21 Model 74501-74503 cards are supplied with a removable two terminal, BLZ
5180/2/180 for the network connection. The wiring to the twisted pair channel is polarity insensitive.
The connector will accept 12 to 26 AWG (1.2 mm to 0.45 mm) wire. See the Junction Box and Wiring
Guidelines for Twisted Pair L
ON W ORKS Networks, L ON W ORKS FTT-10A Free Topology Transceiver
User’s Guide or the L ON W ORKS TPT Twisted Pair Transceiver Module User’s Guide for information
on suitable cables and cable distances.
The PCLTA-21 Model 74504 card is supplied with a removable three terminal, BLZ 5108/3/180 for
the RS-485 network connection. The wiring to the RS-485 twisted pair channel is polarity sensitive.
The connector will accept 12 to 26 AWG (1.2 mm to 0.45 mm) wire. The terminals are connected as
follows (with terminal 3 being closest to the service LED):
Mechanical Considerations
PCLTA-21 Models 74401 – 74404 measure 2.54” (6.5 cm) H x 4.72” (12 cm) L. All models are equipped
with a full-height chassis bracket and a low profile bracket.