Electrical Installation
OUTPUT DEVICES
Two of the following output devices are fitted to the
controllers, depending on the model.
1
Solid state relay drive (SSd/SSd1/SSd2)
5Vdc +0/-15%, 15mA non isolating
To switch a remote SSR (or logic)
2
Miniature power relay (rLY/rLY1)
2A/250V resistive, Form A/SPST contacts.
3
Sub miniature power relay (rLY2)
1A/250V resistive, Form A/SPST contacts.
OUTPUT DEVICE ALLOCATION
Either of the available outputs may be chosen for the main
setpoint (SP1), the remaining device being automatically
allocated to the second setpoint (SP2).
See example illustrated on page 30.
STANDARD MODELS 3300/9300
Output Device 1 + Output Device 2
DUAL RELAY MODELS 3311/9311
Output Device 2 + Output Device 3
DUAL SSd MODELS 3322/9322
Output Device 1 + Output Device 1
Dual relay or dual SSd model options 3311/3322 and
3322/9322 are fully detailed on page 22.
ELECTRICAL INSTALLATION
29
Designed for use with the following supply voltages:
100 - 240V 50-60 Hz 4.0 VA (nominal)
+/-10% maximum permitted fluctuation
12V - 24V (AC/DC) +/-20% 4.0 VA Polarity not required
WIRING THE CONNECTOR
Prepare the cable carefully, remove a maximum of 8mm
insulation and ideally tin to avoid bridging. Prevent
excessive cable strain. Maximum recommended wire size:
32/0.2mm 1.0mm
2
(18AWG).
INDUCTIVE LOADS
To prolong relay contact life and suppress interference it is
recommended engineering practice to fit a snubber
(0.1uf/100 ohms), refer to illustration on page 30.
CAUTION:
Snubber leakage current can cause some electro-
mechanical devices to be held ON. Check with the
manufacturers specifications.
