Temperature Controller - Staveb AG

Preparations 2-11Wiring Control Output 1Terminals 3 and 4 are for control output. The following diagram shows theavailable hard contact or fixed voltage (SSR) outputs and their internalequalizing circuits.Figure 2.9+VGND3 4 3 4LRelay output+ –LVoltage output (SSR)The following table shows the specifications for each output type.Table 2.BOutput TypeRelayVoltage (PNP type)SpecificationsSPST-NO, 250V AC @ 2 A, 30V DC @ 2 A (max. resistive load);electrical life: 100,000 operations, min. load 1V @ 1 mA12V DC, 21 mA (with current limit protection)Output Wiring Considerations• The PNP voltage output (control output) is not electrically isolated fromthe internal circuits. When using a grounding thermocouple, do notconnect the control output terminals to the ground. If the controloutput terminals are connected to the ground, errors will occur in themeasured temperature values as a result of leakage current.• The life expectancy of the output relays varies greatly with the switchingcapacity and other switching conditions. Always use the output relayswithin their rated load and electrical life expectancy. If an output relay isused beyond its life expectancy, its contacts may become fused orburned.• Use the Bulletin 900-TC32 Temperature Controller outputs within therated load. Not doing so may cause damage or fire.• About 4 seconds are required for outputs to turn ON when thecontroller power is turned ON. Take this into consideration when thetemperature controller is incorporated into a sequence circuit.Publication 900-UM003C-EN-E - January 2004