DP25B-TC-Series

Supported Applications

The DP25B-TC is a 1/8 DIN thermocouple panel meter for industrial temperature measurement and control. Part of the DP25B platform, it pairs a programmable digital thermocouple input with a large 4-digit, 9-segment display whose patented programmable color can switch between red, amber and green at setpoints or alarm points for clear at-a-glance status.

It accepts J, K, T and J DIN thermocouples and offers programmable setpoints with analog and relay outputs, so it can both indicate temperature and act on it. Configurable menu items cover input type, decimal point, reading and color configuration, dual setpoints with deadband, proportional band and cold-junction offset calibration, with a default input of Type K from the factory.

A NEMA 4 front bezel suits it to wash-down and dusty panels, and the meter carries CE, UKCA and UL US marks. Note: the meter must be installed in accordance with local electrical codes and safety regulations, and for inductive loads a proper TVS protection diode should be fitted externally across the relay contacts.

Operating Conditions & Performance

The thermocouple input spans an overall range of -270 to 1820°C (-454 to 3308°F), with per-type ranges of:

• Type J: -210 to 760°C (-346 to 1400°F)
• Type K: -270 to 1372°C (-454 to 2500°F)
• Type T: -210 to 400°C (-346 to 752°F)
• Type J DIN: -200 to 900°C (-328 to 1652°F)

Accuracy is ±0.5°C (0.9°F) on each thermocouple type, or ±0.5% of reading ±1 digit overall, with a display resolution of 0.1°C or 0.1°F and a response time of 2 seconds. Programmable hysteresis is adjustable from 0 to 9999.

The meter operates from 0 to 50°C (32 to 122°F) at up to 90% @ 40°C (104°F) non-condensing humidity and stores at -40 to 85°C (-40 to 185°F). Standard power is 115 Vac or 230 Vac ±10%, with low-voltage options of 10 to 32 Vdc and 26 to 56 Vdc. Outputs include a 0 to 10 Vdc or 4 to 20 mA analog signal driving a minimum 500 Ω load, plus dual 5 A SPDT (Form C) relays.

Configuration Options

The model number is assembled as DP25B - <Input Type> - <Power Option> - <Output Option>. Within this series the input is fixed as thermocouple, so meters differ by their power supply and output hardware.

Power options are:

• -230 - 230 Vac.
• -DC10/32 - 10 to 32 Vdc.

Output options are:

• -A - analog output.
• -AI-R - isolated analog output (the -R option is required with -AI).
• -R - dual 5 A relays.
• -AR - combined analog and relay options.

Key Product Differences

All configurations start from the DP25B-TC thermocouple base and add a power suffix and an output suffix, which is how the 13 orderable versions are built. Representative examples include:

• DP25B-TC - base thermocouple meter on standard 115 Vac power.
• DP25B-TC-230-AR - 230 Vac with analog output and dual 5 A relays.
• DP25B-TC-DC10/32-AI-R - low-voltage power with isolated analog output and relays.

The related DP25B-RTD, DP25B-E and DP25B-S models extend the same 1/8 DIN panel meter to RTD, process and strain inputs. The meter measures 48 H x 96 W x 152 mm D (1.89 x 3.78 x 6.0") and weighs 36 g (1.27 lb), and the DPP-5 1/8 DIN panel punch is offered as an accessory for preparing the mounting cutout.