Aplisens APC-2000ALW - Page 48

A1 46 DTR.APC.APR.ALW.03 (ENG)
+TEST
-TEST
-
+
SIGNAL
240 Ω
Ro
mA
4÷20 mA
+
_
F1
.
32
VWX
MNO
DEF
YZ#
5 6
PQR
*
+/
9
GHI
8 0
@%&
1
STU
4
JKL
ABC
7
RE PV F4PF
F2 F3 F4
RAPORT
BELL
202
RS 232
Communicator
Current loop
JUMPER
Power supply
Fig.2b. The link of transmitter and communicator or modem to <SIGNAL+> <SIGNAL-> transmitter terminals in
case of the resistance in current loop is higher than 250Ω.
BELL
202
RS 232
Communicator
Current loop
+TEST
-TEST
-
+
SIGNAL
240 Ω
4÷20 mA
+
_
F1
.
32
VWX
MNO
DEF
YZ#
5 6
PQR
*
+/
9
GHI
8 0
@%&
1
STU
4
JKL
ABC
7
RE PV F4PF
F2 F3 F4
RAPORT
Ro
mA
JUMPER
Power supply
Fig.2c. The link of transmitter and communicator or modem to <SIGNAL+> <TEST+> transmitter terminals in
case of the resistance in current loop is smaller than 250Ω.
To measure the transmitter current without
disconnecting the measuring loop, connect
a milliammeter to control terminals <Test ->
and <Test +>.