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Siemens 6DS1703-8RR Measurement Point Extension Module with 8 Isolated T/C Inputs
Siemens 6DS1703-8RR Measurement Point Extension Module with 8 Isolated T/C Inputs
8 isolated T/C inputs Measurement Point Extension Module
1.5 kV AC isolation Thermocouple Input Module
< ±0.2 °C accuracy Siemens Simatic PLC Module
Place of Origin:
Germany
Brand Name:
Siemens
Model Number:
6DS1703-8RR
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Product Details
Input Range:
–5 MV To +55 MV
Channel Count:
8 Isolated T/C Inputs
Isolation:
1.5 KV AC Channel-to-earth
Terminal Rating:
300 V AC / DC
Accuracy Contribution:
< ±0.2 °C
Operating Temperature:
–20 °C To +70 °C
Storage Temperature:
–40 °C To +85 °C
Humidity:
5 – 95 % RH Non-condensing
Highlight:
8 isolated T/C inputs Measurement Point Extension Module
,1.5 kV AC isolation Thermocouple Input Module
,< ±0.2 °C accuracy Siemens Simatic PLC Module
Payment & Shipping Terms
Minimum Order Quantity
1
Price
66USD
Packaging Details
Brand new and original
Delivery Time
2-3 work days
Payment Terms
T/T
Supply Ability
in stock
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Product Description
Technical Q&A: Expert Engineering Insights
Why is the input calibrated down to -5 mV when our T/C sensors are usually 0 mV at ambient?
The -5 mV offset is a safety buffer for negative temperature gradients and to prevent ADC clamping. Without this "under-zero" headroom, any minor negative fluctuation or sensor drift would be lost to the logic as a flat zero, making precise sub-ambient monitoring impossible.
We have high ground potential on-site. Is the 1.5 kV isolation sufficient?
Yes. 1.5 kV AC channel-to-earth isolation is standard for the 6DS architecture to decouple the millivolt-level signal from the high-voltage noise of the plant floor. It creates a galvanic break that protects the DCS backplane from surge-induced failure during localized ground faults.
The datasheet claims < ±0.2 °C accuracy. Does this include our K-type wire tolerances?
Negative. That spec is the module's internal error budget--the combination of ADC non-linearity and Cold-Junction Compensation (CJC) stability. You must factor in your sensor's Class-1 or Class-2 wire tolerance separately when calculating the total loop error.
What is the "MS Point Extension" actually doing compared to a standard AI module?
This is a Point Expansion node. It doesn't process the control loop logic itself; it aggregates 8 isolated thermocouple points and maps them into the master controller's process image. It allows for high-density analog scaling without adding a second CPU to the rack.
Our cable tray has some 230V lines nearby. Are the 300V rated terminals safe?
The 300V AC/DC rating is for dielectric protection. If a field-side wiring fault causes a 230V cross-over, the terminal block insulation is rated to prevent a flashover that would otherwise jump the trace and destroy the 6DS1703-8RR internal circuitry.
The module is only 0.3 kg. Is it robust enough for high-vibration turbine decks?
The low mass (300g) is intentional. It reduces the inertial stress on the backplane connectors during vibration. High-mass components suffer from "connector fretting" in high-G environments; this lightweight polymer-housing design is more resilient to long-term resonance.
The cabinet is hitting 65 °C. Do we need to shut down the 6DS1703-8RR?
No. The module is rated for 70 °C (rack ambient). Unlike commercial grade I/O that derates at 45 °C or 50 °C, the 6DS series is hardened for industrial heat. As long as you have basic airflow to prevent localized hot spots, you are within the operational envelope.
We received units from Xiamen, China, but the label says "Germany." Are these genuine?
Confirmed genuine. Germany is the Country of Origin (COO) for engineering and manufacturing. Xiamen is the regional logistics hub for Siemens Asia. You are receiving German-spec hardware via a localized distribution point to reduce A-P lead times.
Can we store these in an unheated sea container during winter (-30 °C)?
Storage is rated down to -40 °C, so the hardware will survive. However, you must allow for a 24-hour thermal stabilization period at room temperature before applying power to prevent internal condensation from "popping" the solder joints.
Our site humidity is hitting 90%. Is the conformal coating enough?
It is rated for 95% RH non-condensing. If your site is prone to the dew point being reached inside the cabinet, you must install a heater. The module handles high humidity fine, but liquid water (condensation) on the 8 isolated channels will cause impedance shifts and signal drift.
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Comprehensive Industrial Automation Inventory
When your system speaks a specific language, we have the translator. Our warehouse is a "Who's Who" of industrial power:
- ABB: The robot specialists (DSQC series) & the backbone of Bailey INFI90 / DCS
- Siemens: From 6DD and 6DP to the legacy 6ES5/6DR/6GK series
- Allen-Bradley: The essentials--1756, 1747, and 1746
- GE: Your go-to for IC693, IC697, IC695, and DS200 modules
- Schneider: Deep stock on the 140 Series
- The Precision Players: Bently Nevada (3500/3300), Foxboro (FBM/FCP), and Honeywell (51/MU/MC...)
- Control Masters: Woodward (SPC/PEAK15), Westinghouse (1C/5X), and Triconex (3008/3511/3721)
If it runs your plant, it's probably on our shelf.
Available Siemens Part Numbers
| SIEMENS | 7RE2800-0CA00 | B43570-S4338-Q3 | 15377-4FM |
| SIEMENS | 7UM5111-4CB01-0BB0/JJ | 6DD1661-0AD0 | 15738-119 |
| SIEMENS | 7UT5121-4CB01-0AA0/LL | C98043-A7011-L6 | 16249-51-4 |
| SIEMENS | 7VE5120-4CA10-0A/FF | 6SC6100-0ND20 | 353D4F1NNETNNA4 |
| SIEMENS | 16436-1-03 | 6ES7522-1BH00-0AB0 | 3RX9306-1AA00 |
| SIEMENS | S30810-Q2113-X100-03 | 6ES5927-3KA13 | 405-15ABM |
| SIEMENS | S30810-Q2224-X000-07 | 6ES5526-3LF01 | 405-4DAC |
| SIEMENS | EGA AVUS 4 UTV 4.0 | 6ES7592-1BM00-0XA0 | 405-4DAC-1 |
| SIEMENS | 6FX1113-0AE02 | 6DD1688-0AE0 | 405-4DAC-2 |
| SIEMENS | 6FX1113-4AD01 | 6XV1830-0EH10 200M | 405-8ADC |
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