Specifications
B.1
PRIMARY
PORT INTERFACE
B.1.1
Current Loop Interface
1.
Install
a
snap-on mounting
clip
(P/N 283-339) into each
of the 4
mounting holes
on
the
controller board (see figure). Make sure wings
of
each clip
do not
interfere
with
components
on the
board.
2.
Orient
U1 on the
Current Loop Board (P/N
3515430)
toward
the
left
side
of the
terminal controller board (see figure).
3.
Attach
the
Current Loop Board
to the
mounting clips
on the
controller board.
4.
Aligning
pin 1 of
cable assembly (P/N
3515517)
with
pin 1
hole
of U1 of
Current Board
and pin 1
hole
of U40 of
controller board,
install
cable assembly between Current
and
Controller boards. NOTE:
If
alternate cable assembly (P/N 636-215)
is
used,
use
wire
tie
(P/N 302-335)
to
secure excess cable
to
lower-left side mounting
clip.
5.
Pin
signal assignments
for
the
current loop option are:
9
14
13
25
24
12
7
1
20mA
source
20mA
source
Transmit current
(-)
Transmit current
(+)
Receive
current
(-)
Receive
current
(+)
Ground
Chassis Ground
B-2