Page 17
Model TC80
main power supply. Install the switch or breaker near the analyzer and label it as the Power Switch for the
analyzer.
24VDC
(4 wire configuration)
Attach the 24VDC power cable to terminals #1 and #2 as shown in Figure 2.2.2 and on the diagram inside of the
T80 cover. Attach the 4-20 mA1 cable to terminals #3 (out) and #2 (return)single channel unit and attach the 4-
20 mA2 cable to terminals #4 (out) and #2 (return) for a two channel instrument. Feed the cables through the
gland fitting on the right hand side of the T80. Tighten the cable gland to provide a good seal to the cable. The
instrument can be powered up at this point with no harm to the analyzer but it is best to wait until the sensors
are installed.
110/220 VAC
(4 wire configuration)
Attach power cable as shown in Figure 2.2.2 or as on the diagram inside of the T80 cover. Feed the cable
through the gland fitting on the right hand side of the T80. Tighten the cable gland to provide a good seal to the
cable. The instrument can be powered up at this point with no harm to the analyzer but it is best to wait until
the sensors are installed.
2.2.2
W
IRING
,
S
ENSOR
The Total Chlorine Sensor and the S80 pH Sensor were connected to the TC80 analyzer at the factory, no
additional connections are necessary. Color coded connections for these sensors are shown in the wiring
diagrams in Section 8.3 or on the inside cover of the T80 transmitter.
When replacing a sensor, attach the sensor wires as described above. Feed the sensor cable through the gland
fitting on the left hand side of the T80. Do not use the same gland fitting for the AC power or Alarm/Relays. The
green terminal strip connectors are detachable from the circuit boards. Remove the connector by pulling
straight back from the circuit board.
2.2.3
W
IRING
,
4-20
M
A
O
UTPUTS
24 VDC or 110/220 VAC powered instruments:
For instruments powered with 24VDC or with the internal 110/220 VAC power supply, Model T80-XX-1X-XX
(24VDC) and T80-XX-2X-XX (110/220 VAC), connect the 4-20 mA cable(s) to terminals #3 (out) for channel 1 and
#2 (return) and to terminals #4 (out) for channel 2 and #2 (return).
2.2.4
W
IRING
,
C
ONTACT
R
ELAY
O
UTPUTS
The standard configuration has three SPDT 230V 5 A relays that can be wired either
normally open (NO)
or
normally closed (NC)
. The default configuration is set to use the relays as normally open. If the optional spray
cleaner was ordered then one of the relays is used to control the cleaning cycle.
2.2.5
W
IRING
,
S
ERIAL
O
UTPUT
MODBUS
RTU
Attach the sensor wires as shown in Figure 2.2.2 or as described on the diagram inside the T80 cover. Feed the
sensor cable through the gland fitting on the left hand side of the T80. Do not use the same gland fitting for the
AC power or Alarm/Relays. See MODBUS command register in
Appendix B
.