Spirax Sarco SX80 - Page 30

IM-P323-32
CTLS Issue 5
30
SX80 and SX90 Quickstart Guide
3.4.4 Inputs and outputs
Relays and inductive loads
Note: When switching inductive loads such as contactors or solenoid
va lves, wire the 22 nF/100 Ω. 'Snubbe r' supplied ac ross th e normally open
relay terminals. This will prolong contact life and reduce interference.
Warning : Snubbers pass 0.6 mA at 110 V and a 1.2 mA at
230 Vac, which may be su󰀩cient to hold on high impedance
loads. Do not use in these installations.
3.4.4.1 Relay output (IO1)
1
Included on both SX80 and SX90 controllers.
Output 1 is supplied as standard as a normally
open relay congured for temperature alarm.
For alarm type, see Quick Code Set 3.
- Isolated output 240 Vac.
- Contact rating 2 A 264 Vac resistive.
3.4.4.2 Output 2 (OP2) 4 – 20 mA
2
Included on both SX80 and SX90 controllers.
Output 2 is supplied as standard as a 4 – 20 mA
analogue output. For functionality see Quick
Code Set 2.
- Isolated output 240 Vac.
- Congurable 0 – 20 mA or 4 - 20 Ma.
1A
1B
2A
2B
+
-
I