Spirax Sarco SX80 Installation And Maintenance Instructions

IM-P323-35 CH Issue 3
7
SX80/90
IM-P323-35: Part No 3231354 Issue 7.0 Feb-13 7
2.3 Wire Sizes
The screw terminals accept wire sizes from 0.5 to 1.5 mm (16
to 22AWG). Hinged covers prevent hands or metal making
accidental contact with live wires. The rear terminal screws
should be tightened to 0.4Nm (3.5lb in).
2.4 Precautions
• Do not run input wires together with power cables
• When shielded cable is used, it should be grounded at one
point only
• Any external components (such as zener barriers, etc)
connected between sensor and input terminals may cause
errors in measurement due to excessive and/or un-balanced
line resistance or possible leakage currents
• Not isolated from the logic outputs & digital inputs
• Pay attention to line resistance; a high line resistance may
cause measurement errors
2.5 Sensor Input (Measuring Input)
SX80 and SX90
2.5.1 Thermocouple Input
Positive
Negative
• Use the correct compensating cable preferably shielded
2.5.2 RTD Input
PRT
PRT
Lead compensation
• The resistance of the three wires must be the same. The
line resistance may cause errors if it is greater than 22Ω
2.5.3 Linear Input (mA or mV)
•
If shielded cable is used it should be grounded in one place
only as shown
• For a mA input connect the 2.49Ω burden resistor supplied
between the V+ and V- terminals as shown
2.6 Relay Output (IO1) SX80 and SX90
Output 1 is supplied as standard as a normally open relay
configured for temperature alarm.
• Isolated output 300Vac CATII
• Contact rating: 2A 264Vac resistive
• For alarm type see Quick Code Set 3.
2.7 Output 2 (OP2) (4-20mA) SX80 and
SX90
OP2 is supplied as standard as a 4-20mA analogue output.
For functionality see Quick Code Set 2.
• Isolated output 300Vac CAT II
• Configurable 0-20mA or 4-20mA
• Max load resistance: 500Ω
• Calibration accuracy: < +(1% of reading +200μA)
2.8 Outputs 3 & 4 (OP3/4) SX80 only
Outputs 3 and 4 are normally open (Form A) relays which
share a common connection. They are intended to control
motor driven valves.
For function see Quick Code Set 2.
• Isolated output 300Vac CATII
• Contact rating: 2A 264Vac resistive - any terminal limited
to 2A
2.9 Transmitter Power Supply SX80
The transmitter power supply provides an 18V supply to
power an external transmitter.
• Isolated output 300Vac CATII
• Output 18V +15%
VI
V+
V-
AA
AB
AC
OP3
OP4
-
+
V+
V-
1A
1B
+
2A
2B
-
-
2.49Ω
+
V+
V-
Shield
+
mA / mV input
-
HE
HF
V
+
-

Spirax Sarco SX80 Specifications

General

Brand	Spirax Sarco
Model	SX80
Category	Controller
Language	English