Schneider Electric TMH2GDB Remote Graphic Display M221

TMH2GDB: remote graphic display for Modicon M221 controllers

The TMH2GDB is a remote graphic display from Schneider Electric for the Modicon M221 logic controller range. It puts a 240 × 160 pixel backlit STN LCD with ten keys and a navigation wheel on the cabinet door, so that an operator can read values and change settings without opening the panel. The datasheet lists the display colour as monochrome, a 126 × 80 × 63 mm housing and a net weight of 0.17 kg. It connects to the controller through an RJ45 serial line (RS-485), which also supplies its power. Seven Star LLC supplies the TMH2GDB in Oman and the GCC as an independent supplier based in Muscat.

The datasheet identifies the unit by the reference TMH2GDB and lists the Modicon M221 range for compatibility. We do not decode the letters of the reference further, so confirm compatibility with your exact controller on the datasheet.

Mounting the TMH2GDB on a cabinet door

The mounting location in the datasheet is the front of a cabinet through a 22 mm diameter hole, or the bottom of a cabinet through a 22 mm hole with a mounting accessory. The housing is fixed with an anti-rotation tee and an installation nut, tightened with the socket wrench ZB5AZ905 shown in the overview. The datasheet also gives mounting-hole layout and minimum clearance drawings, which you should follow so that the rear part (IP20) has room for the cable and the RJ45 connector. The front face is rated IP65, a useful level against dust and water jets for panels in plant rooms, while the back is IP20 and must remain inside the enclosure.

Operating temperature is −15–50 °C and storage is −40–70 °C, with relative humidity up to 95 % without condensation and an environment free of corrosive gas. The altitude limit is 2000 m for operation and storage. Vibration resistance is 1.5 mm from 3 to 150 Hz and 2 gn, and shock resistance is 15 gn for 11 ms.

Typical uses of the TMH2GDB in Oman and the GCC

A remote graphic display of this type suits packaged machines, pump stations, water-treatment skids, ventilation and chiller control panels, and small utility cabinets. In Oman and the GCC the door of an outdoor panel can become much hotter than the room, so the −15 to 50 °C operating range is the first thing to check, with shading or a ventilated enclosure where needed. Dust and washdown are also common, which makes the IP65 front useful, while the rear must stay inside a sealed enclosure and the cable entries must be kept tight.

Front panel layout of the TMH2GDB

The datasheet’s overview numbers the controls: F1 and F2 function keys, a MOD key, an ESC key, four configurable keys R1 to R4 beside the screen, a Home key, an information key, and a combined touch wheel, OK key and arrows for navigation. That adds up to the 4 configurable keys and 6 navigation keys quoted in the specification, and it means the operator can reach menus, acknowledge messages and jump back to a home screen with one hand.

The screen is a backlit STN LCD of 240 × 160 pixels. As the display colour is monochrome, plan screens with clear text and simple symbols rather than colour coding. The four R keys are configurable, so their meaning can change from page to page: typical uses are start, stop, reset and page selection. This unit is therefore best described as a remote operator terminal and viewer for a controller, not as a stand-alone HMI with its own programme.

Selecting the TMH2GDB: checklist

• Confirm that the controller is a Modicon M221 or another unit that the datasheet names as compatible.
• Check that the door has a free 22 mm hole and enough depth for the 63 mm housing plus connector.
• Decide whether a monochrome 240 × 160 screen is enough for your screens and languages.
• Plan the RJ45 cable length and route, since the same cable supplies power to the display.
• Verify the ambient range of −15 to 50 °C against the real door temperature.

TMH2GDB technical specifications

Connection and power for the TMH2GDB

One RJ45 connector carries both communication and supply: the datasheet lists a current consumption of 40 mA at 5 V DC via RJ45 connector and a power of 1W, and names the link as RJ45 serial line (RS-485). A separate connector is provided for functional ground (earth), which should be connected so that the display’s electrostatic protection works as intended. Because the supply comes through the cable, the display needs no separate 24 V terminal; the cable run and its quality matter instead, so keep the lead short, away from motor and drive cables, and use the correct pin-out from the controller documentation.

Immunity and emission levels listed for the TMH2GDB

The datasheet quotes electrostatic discharge of 8 kV in air and 4 kV on contact (IEC 61000-4-2), radiated radio-frequency fields of 10 V/m from 80 MHz to 1 GHz, 3 V/m from 1.4 to 2 GHz and 1 V/m from 2 to 3 GHz (IEC 61000-4-3), magnetic field at power frequency of 30 A/m, fast transients of 1 kV, surge of 0.5 kV in common and differential mode and conducted RF disturbances of 10 Vrms (0.15–80 MHz). Emission is given to IEC 55011 class A at 10 m. Pollution degree is 2 to IEC 60664-1, the standards listed are IEC 61131-2 and IEC 61010-2-201, and the certification is cULus with CE marking. Class A emission is typical of industrial equipment, and it is one more reason to use the display in industrial cabinets and not in residential settings.

Information to send with an RFQ for the TMH2GDB

• Reference TMH2GDB and quantity.
• Controller model it will be connected to.
• Cable or mounting accessory needed in the same order.
• Highest expected door temperature.
• Delivery location and required date.

Documents and quotation

The manufacturer datasheet for the TMH2GDB is attached on this page and carries the complete specification set, including the dimension drawings and the derating information. Compare the datasheet revision with your project documents before you freeze a bill of materials.

Send us the reference TMH2GDB, the quantity and the delivery location, and Seven Star LLC will reply to your request for quotation. We work as an independent supplier based in Muscat and serve customers across Oman and the GCC.