2.4
Wiring
There are two connections in the electronics enclosure for
3
⁄
4
" NPT or M20 connections. These are generally used as
one connection for input power and one for output signal.
2.4.1 Power and Signal Connection
The instrument has separate wiring connections for AC (100
to 260 VAC) and DC ( 11.6 to 30 VDC). AC power wiring
connections are made to terminal block TB1. DC Connec-
tions are made to terminal block TB2. Refer to Figure 8.
NOTE: The AC power terminal blocks accept 12–26 AWG wire and
the DC power terminal blocks accept 14–26 AWG wire. Select
wire size consistent with power requirements. The mA output
and pulse also accept 14–26 AWG wire.
For a maximum ambient temperature of 80° C use wiring rated
up to 264 VAC and 105° C. For a maximum ambient of 70° C
use wire rated up to 264 VAC and 95° C.
Caution: OBSERVE ALL APPLICABLE ELECTRICAL CODES
AND PROPER WIRING PROCEDURES.
Wiring
Compartment
Figure 7
Wiring Housing Cover
AC Power input
(100 – 264 VAC)
TB1
DC Power input
(11.6 – 29 VDC)
TB2
Analog Output 1
Active or Passive
connections
TB3
Pulse/Alarm Output
Active or Passive
connections
TB4
1. Make sure the power source is turned off.
2. Unscrew and remove housing cover of wiring compartment.
Refer to Figure 5.
3. Pull power supply and control wires through conduit
connection.
4. Connect power leads to proper terminals. Refer to Figure 8.
a. VAC (100 to 260 VAC) Make connections to TB1.
Connect hot wire to terminal marked L1 and the second
wire to the terminal marked L2.
b. DC (11.6 to 30 VDC)–Make connections to TB2. Con-
nect wires to terminals (+) and (-) on the terminal block.
AC
INPUT
DC INPUT
LOOP1/HART
OUTPUT
PULSE/
ALARM
NOTE: The green screw in the rear of the housing should be used for
earth ground.
100-264 VAC
50/
60Hz
-
+
P-
F2 TEST
A-
P+ A+
P-
A-
P+ A+
TB2
TB1
F1
TEST
TB3
P-
P+
LOOP2
TB4
R1
D6
POWER
OUTPUT
F1
TB5
Analog Output 2
Passive
connections only
TB5
Figure 8
Wiring Connections
Input Wiring Board
7. Connect the 4-20 mA signal wiring to terminal block TB3.
Refer to Section 2.4.3.
8. If the TA2 model has the optional pulse/alarm output,
connect the signal wiring to terminal block TB4.
Connections for both an active (powered) connection and
a passive (requires external power supply) are provided.
Refer to section 2.4.4.
9. The TA2 has the optional second mA output connect signal
wiring to terminal block TB5. This output is a passive
connection requiring an external power supply.
10. Replace housing cover. Installation is complete.
Caution:
In hazardous areas, do not apply power to the unit until
the conduit is sealed and the enclosure cover is screwed
down securely.
L2
L1
NOTE: Install using Teflon
®
tape at all conduit entries (maximum 2 turns).
54-631 Thermatel Model TA2 Transmitter
9
MAGNETROL [ MAGNETROL INTERNATIONAL, INC. ]
