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WARNING : DO NOT ATTEMPT TO CONNECT
AN AMPEROMETRIC BETWEEN A "TEST"
TERMINAL AND A "COMM" TERMINAL. THE
RESULT TO THE POWER SUPPLY IS A SHORT
WHICH WILL BLOW FUSES AND POSSIBLY
DAMAGE YOUR EQUIPMENT, ALSO CAUSING TO
INTERRUPT FUNCTION OF OTHER DEVICES
POWERED FROM SAME SUPPLY.
Internal ground
termination point
Model 691HT Communicator may be
connected at any wiring termination
point in the loop, providing the minimum
resistance is 250 ohm.
If this is less than 250 ohm, additional
resistance should be added to allow
communications.
An optional terminal block
is available for the
connection of a remote
indicator.
External ground
termination point
-
+
Test points
4-20 mA
Fig. 8b - Electrical connections
in case of Hart Communication
Internal ground
termination point
-
REMOTE
METER
+
-
+
Test points
4-20 mA
Fig. 8c - Optional terminal block
in case of Hart Communication
. . . ELECTRICAL CONNECTIONS
NOTE: If the use of the Hand Held Communicator is
foreseen, a resistance of 250 ohms minimum must be
included in the current loop, between the power supply and
the connection point of the Hand Held Terminal, for
communication purpose.
-
Line load
+
250 ohm min
GND
691HT
F1
F2
F3
F4
PV
REVIEW
CONF
SERIAL
LINK
TRIM
A B C
D E F
G H I
1
2
3
J K L
M N O
P Q R
4
5
6
Hand-held
S T U
V W X
Y Z #
7
8
9
communicator
@ %
& /
+
0
-
Remote
indicator
7
%
Kent-Taylor
Line load
250 ohm min
GND
691HT
F1
F2
F3
F4
PV
SERIAL
REVIEW
CONF
LINK
TRIM
A B C
D E F
G H I
1
2
3
J K L
M N O
P Q R
4
5
6
Hand-held
S T U
V W X
Y Z #
communicator
7
8
9
& /
+
@ %
-
0
+
+
Power
source
-
-
Optional
ground
Receiver
+
+
Power
source
-
-
Optional
Receiver
- 9 -
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