Valmet TS - Page 15

Mains power
Connect the mains power cable (90 - 260 VAC) to TCU
through the left-hand conduit of the connector casing,
and connect it to the terminal strip as shown in Fig. 8.
Current signal cables
The TCU contains two current outputs. Current output
1 (CS+, CSIN) is hardwired to give the total solids
content signal. The user can choose either the process
temperature (°C/°F), process conductivity (mS/cm) or
solids content (TS% / g/l) to current output 2 (CS2+,
CSIN2).
Insert the current output cables to the TCU connector
casing through the inlets and connect them to the ter-
minal strip as shown in Fig. 8.
– Power supply wire to connector 'CS+' or 'CS2+'.
– Current output wire to connector 'CSIN' or 'CSIN2'.
NOTE: The current output of the Valmet TS is a passive
output and it requires an external power source. The
minimum supply voltage is dependent on resistance.
NOTE: Do NOT connect the shield of the current output
cable at the TCU - connect it only at the mill system end!
Fig. 7 shows the resistance as a function of input
voltage. Resistance here means the total sum of all
resistances (measurement, cables, power supply) in
the current loop.
1000
500
250
0
6
12 35 V 2817
Ω
Operating region
Fig. 7. Load on TCU current output.
HART
+ 24 V
250
:
+ 24 V
7
CS+
8
CS IN
9
CS2+
10
CS2 IN
6
SHIELD2
VS IN
VS
IN
250
:
TCU
TE
HART
INPUT CHANNEL
Passive transmitter
N
90...260 VAC
47...63 Hz
6
7
8 9 10 11 12 13 1415 16
DC output GND RS485+ RS485- SHIELD SHIELD 2 CS+ CS IN CS2+ CS2 IN BINGND BIN0 BIN1 SHIELD2 FIELDB+ FIELDB-
1 2 3
4
5
Power
Sensor
4...20 mA
Binary
IN
Fieldbus
conn.
Fig. 8. Connections of the TCU.
Installation & Owner's manual, OUL00489 V2.3 EN
15
Valmet Total Solids Transmitter