The Interface Solution Experts
17
FDY
PC-Programmable Frequency
Transmitter and Display
Figure 12.
Hook-Up Diagram for Installing the FDY into the Application
Recommended Ground
Wiring Practices
Moore Industries recommends the following ground
wiring practices:
• Any Moore Industries product in a metal case or
housing should be grounded.
• The protective earth conductor must be connected
to a system safety earth ground before making any
other connections.
• All input signals to, and output signals from,
Moore Industries’ products should be wired using
a shielded, twisted pair wiring technique. Shields
should be connected to an earth or safety ground.
• For the best shielding, the shield should be run
all the way from the signal source to the receiving
device. (see Note below)
• The maximum length of unshielded input and
output signal wiring should be 2 inches.
Note:
Some of Moore Industries’ instruments can be
classifi ed as receivers (IPT
2
, IPX
2
, etc.) and
some can be classifi ed as transmitters (TRX,
TRY, etc.) while some are both a receiver
and a transmitter (SPA
2
, HIM, etc). Hence,
your shield ground connections should be
appropriate for the type of signal line being
shielded. The shield should be grounded at
the receiver and not at the signal source.
COM
+PS
0
+ –
–PS
0
CONTACT CLOSURE
INPUT HOOK-UP
FDY
COM
+PS
0
+ –
–PS
0
6027.8
HZ
–
+
–
+
POWER
SOURCE
10-42Vdc
READOUT DEVICE,
CONTROL SYSTEM
–
+
DC INPUT
AC INPUT
OR
250 ohms
OR
Customer Service
If service assistance is ever required for one of the
FDYs in your application, refer to the back cover of this
manual for the telephone numbers to Moore Industries
STAR Center customer service department.
If possible, make a note of the model number of the
offending unit before calling. For fastest assistance, try
to gather information on the unit(s) serial number and
the job and purchase order number under which it was
shipped.
