Super Systems 9010 Series - Manual (Page 6)

SSi Manual Series 9010 – eSPP Programmer Page 6
Wiring
It is important to connect the controller in accordance with the wiring data given in this handbook. Take
particular care not to connect AC supplies to the low voltage power supply input. Use copper wires for
24V DC power supply to the instrument. Ensure that the wiring of installations comply with all local wiring
regulations. For example in the United Kingdom use the latest version of the IEE wiring regulations,
(BS7671). In the USA use NEC Class 1 wiring methods.
Power Isolation
The installation must include a power isolating switch or circuit breaker. This device should be in close
proximity to the controller, within easy reach of the operator and marked as the disconnecting device for
the instrument.
Earth leakage current
Due to RFI Filtering there is an earth leakage current of less than 0.5mA. This may affect the design of an
installation of multiple controllers protected by Residual Current Device, (RCD) or Ground Fault Detector,
(GFD) type circuit breakers.
Over current protection
To protect the internal PCB tracking within the controller against excess currents, the AC power supply to
the controller and power outputs must be wired through a fuse or circuit breaker specified in the
technical specification.
Voltage rating
The maximum continuous voltage applied between any of the following terminals must not exceed 24V DC
 relay or triac output to logic, DC or sensor connections;
 any connection to ground.
The controller should not be wired to VAC. The 24V DC power supply voltage across the connections and
between the power supply and ground must not exceed 2.5kV. Where occasional voltage over 2.5kV are
expected or measured, the power installation to both the instrument supply and load circuits should
include a transient limiting device.
These units will typically include gas discharge tubes and metal oxide varistors that limit and control
voltage transients on the supply line due to lightning strikes or inductive load switching. Devices are
available in a range of energy ratings and should be selected to suit conditions at the installation.