Rockwell Automation 900-TC32 Digital Temperature Controllers, Series B - Manual (Page 28)

Publication 900-UM007D-EN-E - January 2011
1-4 Bulletin 900 Input & Output Overview
Features
• Watertight construction (equivalent to IP66 indoor use).
• Conform to cULus/IEC safety standards and EMC standards.
Main Functions
The following introduces the main functions of the Bulletin 900-TC8,
900-TC16, and 900-TC32 temperature controllers. For details on each
function and how to use them, refer to Chapter 3 and onward.
• Input Sensor Types — The following input sensors can be connected
for temperature input:
– Thermocouple: K, J, T, E, L, U, N, R, S, B, W, PL11
– Infrared non-contact temperature sensor type: Type K thermocouple
(10…70XC), K (60…120XC), K (115…165XC), K (160…260XC)
– Platinum resistance thermometer: Pt100, JPt100
– Analog millivolt input: 0…50 mV
• High level analog inputs: ➊
– Current input:4…20 mA DC, 0 to 20 mA DC
– Voltage input:1…5V DC, 0…5V DC, 0…10V DC
• Control Output — Control output is either an On/Off
electro-mechanical relay (EMR) ON/OFF triac output (AC only) ➊ ,
On/Off voltage (input to solid-state relay) output, or analog current
(DC: 4...20 mA or 0…20 mA) output
➊ , Refer to Table 1.B or 1.D.
• Triac Relay Outputs ➊ — use semiconductors for switching when
closing andopening the AC voltage circuit, thereby eliminating relay
chatter and arcing and improving durability versus an EMR. However, if
high levels of noise or surge are imposed between the output terminals,
short-circuit faults may occasionally occur. If the triac output becomes
permanently shorted, there is the danger of fire due to overheating of
the heater element. To avoid this danger, design safety into the system,
including measures to prevent excessive temperature rise and fire. Take
countermeasures such as installing a surge absorber. As an additional
safety measure, provide error detection in the control loop. Use the
Loop Break Alarm (LBA) and Heater Short Alarm (HSA) that are
provided for Bulletin 900 temperature controllers.
➊ The Bulletin 900-TC32 Temperature Controller does not support this function