VersaPro Temperature Controller
Page 10
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2.12 Grounding of the temperature sensor shield
In some installations it is common practice to replace the temperature sensor while the controller is still
powered up. Under these conditions, as additional protection against electric shock, we recommend that the
shield of the temperature sensor be grounded at one end of the wire. Do not rely on grounding through the
framework of the machine.
2.13 Installation requirements for EMC
To ensure compliance with European EMC directives certain installation precautions are necessary as follows:
When using relay outputs it may be necessary to fit a filter suitable for suppressing the emissions. The filter
requirements will depend on the type of load. For typical applications such as Schaffner FN321 or FN612
line filters or equivalents.
If the unit is used in table top equipment which is plugged into a standard power socket, it is likely that
compliance to the commercial and light industrial emissions standard is required. In this case, to meet the
conducted emissions requirement, a suitable mains filter should be installed. Recommended filters would
be Schaffner types FN321 and FN612 or equivalents.
2.14 Routing of wires
To minimize the pick-up of electrical noise, the wiring for low voltage dc and particularly the sensor input
should be routed away from high-current power cables. Where it is impractical to do this, use shielded cables
with the shield grounded at one end.
3 VersaPro
Features
The VersaPro is a single loop process controller / monitor has the following capabilities:
24 bit Sigma-Delta ADC for thermocouple with cold junction compensation.
Two (2) 4-20 milliamp outputs for control or chart recorder.
Sixteen character LCD with two four-digit LED segment displays.
Two (2) Form A control contacts. (controller)
Two (2) Form A alarm contacts.
PID control modes. (controller)
Serial Communication with Marathon Monitors or Modbus Protocol.
EEPROM stores setup and calibration values.
