Analog input
EP3204 | 4-channel analog input PT100 (RTD)
M12 I/O
connection sockets
Signal status display
Labelling areas
Power supply
status display:
Box supply (US)
Auxiliary voltage (UP)
1 | RL+
2 | R+
3 | RL-
4 | R-
5 | Shield
1 | Tx+
2 | Rx+
3 | Rx-
4 | Tx-
1 | + 24 V DC Us
2 | + 24 V DC UP
3 | GNDs
4 | GNDP
Power supply feed
Power supply down-
stream connection
signal input
signal output
4-wire 3-wire 2-wire
extended temperature range

EP3204-0002 | 4-channel analog input PT100 (RTD)

The EP3204 EtherCAT Box with analog inputs allows resistance sensors to be connected directly. The module’s circuitry can operate the sensors using 2-, 3- or 4-wire connection techniques. Linearisation over the full temperature range is realised with the aid of a microprocessor. The temperature range can be selected freely. The module can also be used for simple resistance measurement with the output in ohms. The module’s standard settings are: resolution 0.1°C in the temperature range of PT100 sensors in 2-wire connection. Sensor malfunctions such as broken wires are indicated by error LEDs. The module is quite versatile, but the default values are selected in such a way that in most cases it is not necessary to perform configuration. The input filter and associated conversion times can be set within a wide range; several data output formats may be chosen. If required, the inputs can be scaled differently. Automatic limit monitoring is also available. Parameterisation is carried out via EtherCAT.

Technical data EP3204-0002
Number of inputs 4
Connection method screw type M12 for 2-, 3- and 4-wire connections, presetting: 2-wire
Protocol EtherCAT
Bus interface 2 x M8 socket, shielded, screw type
Sensor types PT100, PT200, PT500, PT1000, Ni100, Ni120, Ni1000 resistance measurement (e.g. potentiometer, 10 Ω…1.2/4 kΩ)
Signal type PT100
Measuring range -200…+850 °C (PT sensors); -60…+250 °C (Ni sensors)
Resolution 0.1 °C per digit
Measuring error < ±0.5 °C for PT sensors (further types see documentation)
Conversion time 800 ms up to 2 ms, see documentation, default: approx. 85 ms
Nominal voltage 24 V DC (-15 %/+20 %)
Distributed clocks
Measuring current typ. 0.5 mA
Input filter 5 variations, configurable
Sensor supply
Current consumption from US 120 mA
Power supply connection feed: 1 x M8 male socket, 4-pin; downstream connection: 1 x M8 female socket, 4-pin
Bit width in the process image 4 x 32 bit RTD input
Electrical isolation 500 V
Special features open-circuit recognition
Weight approx. 165 g
Operating/storage temperature -25…+60 °C/-40…+85 °C
Vibration/shock resistance conforms to EN 60068-2-6/EN 60068-2-27
EMC immunity/emission conforms to EN 61000-6-2/EN 61000-6-4
Protect. class/installation pos. IP 65/66/67 (conforms to EN 60529)/variable
Approvals CE, UL, Ex
ZK1090-3xxx-xxxx Cables for EtherCAT signal in- and -output
ZK2000-6xxx-xxxx Cables for M12 I/O connection sockets
ZK2000-5xxx/71xx-xxxx Sensor cable 5-wire unshielded/shielded
ZK2020-3xxx-xxxx Cables for M8 power supply
Related products  
EQ3204-0002 EtherCAT Box, stainless steel housing, 4 analog inputs for resistance sensors (RTD), PT100…1000, Ni100, 16 bit