IST
Page 7
The Interface Solution Experts
Terminal wires used should be between 14 and 22
AWG. Connections are made with compression-screw
sockets. Use a slotted-tip screwdriver with a head
width no greater than 3 mm (0.12 inch).
WARNING:
Make sure all connections are secure
before applying power to the IST.
Potentially harmful voltages are present at
the ac terminals during operation. Adhere
to all local safety guidelines.
–IN and +IN terminals are for connection of negative
and positive signal input, respectively; –OUT and
+OUT are for the connection of current-driven instru-
mentation (load) to IST output; and AC, ACC, and GND
are the terminals for connection of unit power.
Figure 5 illustrates the installation hookup of the stan-
dard IST and figure 6 shows the installation hookup of
the IST when configured with the TX Option. As shown
in figure 6, TX-equipped units have an addiTX
terminal, and the –IN terminal is not used. Figure 7
illustrates the installation hookup for the single IN, dual
OUT model. Figures 8 and 9 show the installation
hookup for the dual IST.
Figure 4. Dimensions of the IST
NOTE:
Unit front panel shows TX Option installed.
80 mm
(3.15 in)
+IN -IN TX +OUT-OUT
AC ACC GND
Dual Channel Models
89mm (3.5 in.)
ZERO
SPAN
ISOLATING SIGNAL
TRANSMITTER
135mm
(5.3 in)
128mm
(5.04 in)
Single Channel Models
65mm (2.57 in.)
