Flush HMI displays for control cabinet doors · rear-mount cutout and door thickness, overlay and IP of the finished door, rear- versus front-mount versions, room for stop controls
A rear-mount HMI panel is an operator display and touch panel built to be fitted from the inside of a control cabinet door, so that only the screen shows through a cutout and the door's outer skin stays flush. It is the display part of a central control cabinet's operator side, and its order depends as much on the door as on the electronics. Ask three things first: what cutout and door thickness it needs, who makes the door sealed (overlay or gasket) and to what IP rating, and whether a front-mount version of the same unit would suit the door better.
HMI displays and touch panels designed for flush rear mounting in control cabinet doors and machine fronts, compared with front-mount versions of the same units, specified by cutout, door thickness, sealing method and resulting IP rating, power and ports. Stand-alone operator touch panels and their screen design are covered on the Human-machine interface (HMI) page; machine-side operating housings on support arms or pedestals that combine a touch panel with emergency stop and pushbuttons on the HMI interface operator station page; touch-layer technology on the HMI touchscreen page; stainless washdown terminals on the washdown HMI page. Industrial PCs and the cabinet's PLC are outside this page.
CNFX editorial research · Sources checked October 12, 2026 · 4 sources
Weintek's MT8071iER1 is a rear-mount 7-inch HMI that fits from behind the door so the front sits flush with the control plate. It needs a panel cutout of 174.6 × 113.6 mm in a door from 1.5 mm to 3.5 mm thick, measures 189.6 × 137.1 × 34.3 mm and weighs about 520 g. [1]
Its protection is NEMA 4 / IP65, but Weintek notes that IP65 can be expected only if a user-prepared overlay is affixed over the screen and its surroundings, and that Weintek does not guarantee the protective structure. [1] Editorial note: on a rear-mount panel the sealing is partly the door builder's job; state who supplies and fits the overlay and what IP rating the finished door must reach.
The same unit has a 7-inch 800 × 480 TFT at 400 cd/m², a 4-wire resistive touch panel, 24 ± 20% VDC input at 450 mA, one Ethernet port, one RS-232 and two RS-485 ports, and operates from 0 to 50 °C at 10–90% RH non-condensing. [1] Editorial calculation: 450 mA × 24 V ≈ 10.8 W.
Send the door material and thickness, available space between door and mounting plate, display size and mounting (rear or front), required IP rating of the closed door, list of buttons, selectors and lights with functions and colours, emergency stop type and contact count, supply voltage, communication link to the PLC, and ambient temperature.
02
Compare the rear-mount and front-mount versions of the same HMI
Weintek builds the same 7-inch electronics in both forms. The rear-mount MT8071iER1 measures 189.6 × 137.1 × 34.3 mm, weighs about 520 g, has a plastic enclosure and states NEMA 4 / IP65 only with a user-prepared overlay. [1] Wachendorff lists the front-mount MT8071iE with an installation depth of 34 mm, about 600 g, IP65 on the front (NEMA 4 compliant), and a seal and mounting material in the scope of delivery. [3]
Editorial note: a rear-mount unit suits a door whose front must stay flat for cleaning or appearance, but the door builder then owns the seal; a front-mount unit carries its own gasket and rating. State which one the door drawing assumes before the door is cut.
03
Leave room on the door for the stop controls
Where a rear-mount HMI shares a cabinet door with stop controls, the door layout has to satisfy the machinery rules for those controls. Schedule 2 of the UK Supply of Machinery (Safety) Regulations 2008 requires emergency stop devices with clearly identifiable, clearly visible and quickly accessible control devices (section 1.2.4.3), stop controls with priority over start controls (1.2.4.1), and indicators the operator can read from the control position (1.2.2). [4]
Each stop device needs its own hole beside the display cutout: Eaton's C22-PV-K02-P62 emergency stop, for example, fits a 22.5 mm mounting hole with a 38 mm head. [2] Editorial note: draw the display cutout, the stop-device holes and the reinforcement of the door sheet together; selection of the emergency stop and pushbutton devices themselves is covered on the HMI interface operator station page.
04
Match the display data to the door and the cabinet supply
The display fields below are given for the rear-mount unit reviewed; the cutout, door and sealing lines above set the rest of the order.
Paste it into your enquiry below or into an email to a maker, then replace every bracket.
Door: [material; thickness; IP required]
Display: [size; rear or front mount; cutout]
Sealing: [overlay or gasket; who supplies]
Stop devices on the door: [number; hole sizes]
Supply: [24 VDC or other]
Link: [Ethernet; RS-485; PLC protocol]
Environment: [temperature; humidity]
Fray Tech lists HMI panels and touch display modules; confirm whether it supplies rear-mount units and the door cutout drawing.
Hangzhou Fray Tech Co., Ltd.
Manufacturing site to be confirmed for the order
Lists 5-, 7-, 8- and 10-inch HMI panels and touch modules, customisable from 2.8 to 21 inches with Modbus, RS485 or Ethernet, and states IP65 rugged units and −20 to 70 °C panels.
Explore company information and manufacturing capabilities, then discuss the scope of your project with a relevant supplier.
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Compiled and source-reviewed by the CNFX editorial team.
Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review
· Page last updated 13 October 2026
Buyer questions
Does a rear-mount HMI keep its IP65 rating in any door?
Not automatically. Weintek states IP65 for its rear-mount MT8071iER1 can be expected only with a user-prepared overlay fitted, in a door 1.5–3.5 mm thick. [1]
Rear-mount or front-mount HMI for a cabinet door?
The rear-mount MT8071iER1 sits flush but needs a user overlay for IP65; the front-mount MT8071iE is listed with IP65 on its front and a supplied seal. [1][3]
What must the stop controls beside the display meet?
UK machinery rules require clearly identifiable, quickly accessible emergency stop devices and stop controls with priority over start. [4]
Sources and what still needs a direct check
Sources checked 2026-10-12. Weintek publishes the rear-mount datasheet and Wachendorff, a distributor, the front-mount version of the same HMI; Eaton's datasheet gives an emergency stop hole size; the UK regulation sets the requirements for stop controls on machinery.
