HT401-222-8/0  HT 401 and HT 402 are portable controls

Housing
• CE conforming housing
• Housing form conceived for both left- and right-handers
• Impact-resistant plastic housing withstands oil, grease, alcohol, and condensates
containing hydrochloric acid, nonflammability (UL94-V0)
• Rubber bushing at cable entry for cables with a diameter from 8 to 11 mm
Operating and display panel
• 40 membrane keys with tactile feedback, transparent key surface and rim embossing
• 40 2-color LEDs (red and green), 1 LED is assigned to each key
• 4 slots for individual key labeling
• Slot for individual device labeling (e.g. company logo)
(except HT 401-8×20 and HT 402)
• Buzzer installed in the back of the device for keyclick and audible alarm
• LED-backlit supertwist LC display with 4 x 16 characters

HT401-222-8/0

Operating safety
• The devices meet the standards
EN60204-1 (Safety of machinery – Electrical equipment of machines)
EN61131-1 and -2 (Programmable controllers)
• EMC standards
EN50081-2 (EMC – Generic Emission Standard) and
EN50082-2 (EMC – Generic Immunity Standard)
• Emergency stop switch in accordance with EN418 (Safety of machinery):
2 potential-free normally closed contacts for connecting external peripherals, nominal
voltage 24 V (Safety low voltages in accordance with EN61131-2 and EN50178
(Electronic equipments for use in power installations)), maximum current 500 mA.
The emergency stop switch can also be evaluated by the software.
• Enabling switches in accordance with EN 60204-1 in safety categories in accordance with
EN 954-1:1996 (safety-related parts of control systems):
2-channel, 3-position: safety category 3
2-channel, 2-position: safety category 3
1-channel, 2-position: safety category B
2 potential-free normally open contacts for connecting external peripherals, nominal voltage
24 V DC (safety low voltage in accordance with EN 61131-2 and EN 50178), maximum
current 500 mA DC.