The SS3014 RTD IO Module is able to acquire up to 4 RTD input signals, data values are transmitted with MODBUS RTU/ASCII protocol on the RS-485 network (RS232 interface is available.)
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With this 4ch Modbus RS-485 IO Module, it is possible to connect RTD , Potentiometers or Resistance signals. By means of a 16 bit converter, the device guarantees a high accuracy and a stable measure versus time and temperature. Furthermore, to ensure the plant safety, two Watch-Dog timer alarms are also provided. Additionally, the 2000 Vac isolation between input, power supply and serial line removes eventual ground-loop effects. As a result, the device can even be used in heavy environmental conditions. SS3014 is in compliance with the 89/336/CEE directive on the electromagnetic compatibility. The device is housed in a rough self-extinguishing plastic container which, thanks to its thin profile of 17.5mm only, allows a high density mounting on EN-50022 standard DIN rail.
The SS3014 is designed to work with the MODBUS RTU/ASCII protocol: standard protocol in field-bus; allows to directly interface SS3000 series devices to the larger part of PLCs and SCADA applications available on the market.
For the protocol and installation instructions, please see the specifications sheet and user manual.
Typical @ 25°C and in the nominal conditions.
| RTD Input 2 or 3 wires | Pt100: -200 to +850 °C Pt1000: -200 to + 200 °C Ni100: -60 to +180 °C Ni1000: -60 to +150 °C |
| RES. Input 2 or 3 wires | Low: 0 to 500 Ω High: 0 to 2000 Ω |
| POT. (nom value) | Low: 20 to 500 Ω High: 20 to 2000 Ω |
| Input Calibration | RTD: ±0.05 % f.s. Res.: ±0.05 % f.s. Pot.: ±0.05 % f.s. |
| Linearity | RTD ±0.1 % |
| CJC Thermal Drift | ±0.02 °C/ °C f.s. |
| Lead wire resistance influence | RTD/res. 3 wires: 0.05 %/Ω (50 Ω max balanced) f.s. |
| RTD excitation current | 0.350 mA |
| Thermal Drift | ± 0.005 % / °C f.s. |
| Rise Time | 0.5 to 2 sec |
| Data Transmission | Baud Rate: 38.4 Kbps Max Distance: 1.2 Km |
| Warm-up Time | 3 min. |
| Power Supply Voltage | 10 to 30 Vdc |
| Power Supply Current Consumption | 30 mA @ 24 Vdc |
| Power Supply Polarity Inversion Protection | 60 Vdc max |
| Isolation | Input - RS485: 2000 Vac 50 Hz, 1 Min. Supply - Input: 2000 Vac 50 Hz, 1 Min. Supply - RS485: 2000 Vac 50 Hz, 1 Min. |
| Operating Temperature | -10 to +60 °C |
| Storage Temperature | -40 to +85 °C |
| Humidity (non condensing) | 0 to 90 % |
| Housing Material | Self-extinguishing plastic |
| Mounting | EN-50022 DIN rail |
| Weight | ∼ 150 g |
| EMC | EN 61000-6-2 EN 61000-6-4 |
DAQLOG Systems Ltd
Brixham Laboratory
Freshwater Quarry, Brixham, TQ5 8BA
Tel: 01803 611 854
