User`s guide

PLCTA-20 Adapter User’s Guide 5-3
Figure 5.3 shows the layout of the PCLTA-20 adapter model 74405. The model 74405
adapter is equipped with a header connector for an SMX transceiver; this adapter
does not have an integral transceiver. Attach the SMX transceiver in accordance with
the manufacturer’s instructions – see the document
L
ON
W
ORKS
®
SMX™ Transceiver
Installation Instructions
document 078-0145-01 version D or later if using an Echelon
SMX transceiver.
Figure 5.3 PLCTA-20 Model 74405 with PLM-22 SMX Transceiver Installed
P1 and P2 PCI Bus Connector
The pinout of the P1 and P2 connector terminals is the standard pinout for the 32-bit
PCI bus used in IBM-compatible PCs. The power drawn from the host is 250mA @
5VDC, typical. Actual power consumed for the model 74405 adapter will vary
according to the power needs of the selected SMX transceiver.
Network Connector
The PCLTA-20 model 74401-74403 adapters are supplied with a removable two
terminal, Weidmüller BLA connector (BLA 2B OG) for the network connection. The
wiring to the twisted pair channel is polarity insensitive. The connector will accept
12 to 26AWG (1.2mm to 0.45mm) wire. See the
Junction Box and Wiring Guidelines
for Twisted Pair L
ON
W
ORKS
Networks
8
,
L
ON
W
ORKS
FTT-10A Free Topology
Transceiver User’s Guide
1
or the
L
ON
W
ORKS
TPT Twisted Pair Transceiver Module
User’s Guide
6
for information on suitable cables and cable distances.
The PCLTA-20 model 74404 adapter is supplied with a removable three terminal,
Weidmüller BLA connector (BLA 3B OG) for the RS-485 network connection. The
wiring to the RS-485 twisted pair channel is
polarity sensitive
. The connector will