Specifications

16-410 | OWNER’S GUIDE
EPAD2-RTD8 and CPAD2-RTD8
Intelligent amplier with integrated 24-bit A/D conversion
8 input channels for RTD sensors
Supports 2-wire and 4-wire hook-ups
Inputs isolated to 350 VDC
Modules daisy-chain together to add more and more channels
EPAD2 series uses RS485 interface
CPAD2 series uses CAN 2.0B interface
Specications
Parameter EPAD2-RTD8 and CPAD2-RTD8
Input channels: 8 isolated RTD channels
Input ranges:
Resistor: 0 to 999.99 Ω
RTD: PT100(385); PT200(385); PT500(385); PT1000(385); PT2000(385); PT100(3961)
Sample rate: 12.5 S/s/ch maximum
-3 dB bandwidth: 6 Hz
ADC type:
Sigma delta ADC per channel, 24-bit
(Note: CPAD2 outputs CAN data at 16-bits)
Input connector: ERA.1S.304
Resolution: 0.01 °C for all types
Input impedance: typically >100 MΩ
Bias current: typically 10 nA
Connection type: 2-wire, 4-wire (see diagrams on opposite page)
Accuracy:
Pt100 a = 0.00385 Pt100 a = 0.003916 Pt200 a = 0.00385
±0.25 °C @ -200 to 100 °C ±0.25 °C @ -200 to 100 °C ±0.25 °C @ -200 to 100 °C
±0.4 °C @ 100 to 400 °C ±0.4 °C @ 100 to 400 °C ±0.4 °C @ 100 to 400 °C
±0.8 °C @ 400 to 800 °C ±0.8 °C @ 400 to 800 °C ±0.8 °C @ 400 to 800 °C
Pt500 a = 0.00385 Pt1000 a = 0.00385 Pt2000 a = 0.00385
±0.25 °C @ -200 to 100 °C ±0.25 °C @ -200 to 100 °C ±0.25 °C @ -200 to 100 °C
±0.4 °C @ 100 to 250 °C ±0.4 °C @ 100 to 400 °C ±0.4 °C @ 100 to 400 °C
±0.8 °C @ 400 to 600 °C ±0.8 °C @ 400 to 600 °C
Temperature drift: typically 25 ppm/°C
Isolation voltage: 350 VDC (channel to channel and channel to Bus, Power and Chassis)
Over-voltage protection: 15 VDC
CMRR @ 50/60 Hz: 130 dB
Interface:
EPAD2 series: RS485
CPAD2 series: CAN BUS 2.0B protocol
Read-out speed:
EPAD2 series: typ. 80 ch/sec.
CPAD2 series: 12.5Hz, 10Hz, 5Hz, 2Hz, 1Hz, 0.5Hz, 0.2Hz or 0.1 Hz programmable
Bus power connector: LEMO EGG.1B.304
Power supply voltage: 7 to 40V
Power consumption: 0.5 W maximum
Dimensions:
Base module (W x D x H)
Mounting holes distance:
129 x 72 x 34.2 mm (5.1 x 2.8 x 1.3 in.) incl. mounting holes
119 x 7 mm (4.7 x 0.3 in.), 4.2 mm (0.165 in.) diameter
Weight: 310 g typical