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Omron E5EC-PR2ASM-804 — Process / Temperature Controllers

Omron E5EC-PR2ASM-804 Process Controller, 4 Relay, RS-485

MPNE5EC-PR2ASM-804
Active

Omron E5EC series process/temperature controller, 4 relay outputs, RS-485 CompoWay/F Modbus, 100-240VAC supply, IP66 front panel, panel mount 92x45mm cutout.

Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for machine-down parts
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026

Specifications

E5EC-PR2ASM-804 — Identification
ParameterValue
SeriesE5EC
TypeProcess, Temperature Controller (RTD, Type B, E, J, K, L, N, PLII, R, S, T, U, W)
E5EC-PR2ASM-804 — Electrical
ParameterValue
Supply voltage100 ~ 240VAC
E5EC-PR2ASM-804 — Performance
ParameterValue
Control methodOn/Off, Proportional (PID)
FeaturesEvent Input
E5EC-PR2ASM-804 — I/O
ParameterValue
Input range-200°C ~ 2300°C, 0 ~ 20mA, 0 ~ 10VDC
Output typeRelay (4)
E5EC-PR2ASM-804 — Communication
ParameterValue
Communication interfacesRS-485 (CompoWay/F, Modbus)
E5EC-PR2ASM-804 — Display
ParameterValue
Display typeLCD - Dual Color Characters, Backlight
Characters per row4, 4
Character height0.710" (18.00mm), 0.433" (11.00mm)
E5EC-PR2ASM-804 — Environmental
ParameterValue
Operating temperature-10°C~55°C
Ingress protection (IP rating)IP66 - Dust Tight, Water Resistant
E5EC-PR2ASM-804 — Mechanical
ParameterValue
Mounting typePanel Mount
Panel cutout dimensionsRectangular - 92.00mm x 45.00mm
Termination styleScrew Terminal
E5EC-PR2ASM-804 — Other specifications
ParameterValue
Weight0.463 lb (210.01 g)

Product details

What this controller brings to a panel

The Omron E5EC-PR2ASM-804 is a 1/16 DIN process and temperature controller that accepts RTD and thermocouple types B, E, J, K, L, N, PLII, R, S, T, U, W, plus 0-20mA or 0-10VDC analog signals. Four relay outputs give you separate control of heating, cooling, alarm, and event functions without adding external interposing relays for most loads up to the relay contact rating. The RS-485 port speaks both CompoWay/F and Modbus protocols, so it drops into existing plant networks without a protocol converter.

Panel cutout is 92.00mm x 45.00mm — the standard 1/16 DIN footprint that fits existing punch patterns on retrofit jobs. The IP66-rated front bezel handles washdown and dust exposure common in food, beverage, and chemical processing lines; the screw-terminal rear stays inside the enclosure.

Control loop and programming

On/off or proportional (PID) control method with auto-tune — set it for simple thermostat duty or let it self-optimize for thermal process loops like extruder barrels or oven zones. The dual-color LCD backlight shows process value and setpoint simultaneously; the 18.00mm upper and 11.00mm lower characters are readable from across a machine cell. Event input on the screw terminals lets an external contact or PLC digital output trigger a pre-programmed setpoint change or control mode switch — useful for recipe changes or standby mode.

Frequently asked questions

Does the E5EC-PR2ASM-804 support Modbus RTU communication?

Yes, the RS-485 port supports Modbus (RTU mode) as well as Omron's CompoWay/F protocol, so it integrates with most PLCs and SCADA systems without a gateway.

How do I wire the E5EC-PR2ASM-804 for temperature control?

The screw-terminal rear accepts the sensor (RTD or thermocouple per the selected input type), the 100-240VAC supply, and up to four relay output loads. The RS-485 A/B terminals connect to the network. The event input terminals accept a dry contact or 24VDC signal for setpoint switching.

MPN
E5EC-PR2ASM-804