SKT-DR-11P美国OMEGA

　　Model SMLA-TC of field configurable limit alarms with thermocouple input offers wide ranging inputs and flexible setpoint capability. It accepts six popular thermocouple types with inputs ranging from -270°C (454°F) to 1760°C (3200°F). The SMLA-TC provides two independent setpoint alarms (2 SPDT, 5A) and includes 0.25% to 50% adjustable deadbands and able 120/240 Vac power.

　　Model SMLA-TC is equipped with a dual function diagnostic LED. The green center LED indicates line power and input signal status. Active line power is indicated by an illuminated LED. If the center LED is off, check line power and the wiring connection. If the input signal is above full scale, the LED will flash at approximately 8 Hz. Below 0%, the flash rate is approximately 4 Hz.

　　Setpoints are top accessed multi-turn potentiometers. The field configurable SMLA-TC limit alarm setpoints can be configured for HI, LO, latching or fail-safe trip operation. Non-latching HI and LO setpoints have respective HI and LO deadbands. In a tripped condition, the setpoint is exceeded and the appropriate red LED is lit. The trip will reset only when the process falls below the HI deadband or rises above the LO deadband. To reset a latched setpoint the signal must be in the safe region and the line power must be turned off for at least 5 seconds. For proper deadband operation, the HI setpoint must always be set above the LO setpoint.

　　In failsafe operation, the relay is energized when the process is below a HI setpoint or above a LO setpoint (opposite for non-failsafe). In the failsafe mode, a power failure results in an alarm condition.

　　The input must remain beyond the setpoint for 100 milliseconds, uninterrupted, to qualify as a valid trip condition. Likewise, the input must fall outside the deadband and remain there for 100 milliseconds to return the alarm to an untripped condition. This effectively results in a “dynamic deadband” - based on time - in addition to the normal deadband.

　　The factory default configuration for the SMLA-TC is as follows:

　　Input: Type J, 0 to 360°C (32 to 680°F)

　　Burn Out: Positive

　　Output: Dual, SPDT

　　Trip: A: HI, B: LO

　　Latching: No

　　Failsafe: No

　　Deadband: A/B: 0.25%

　　Power: 120 Vac

　　When switching inductive loads, maximum relay life and transient EMI suppression is achieved using external protection. Place all protection devices directly across the load and minimize lead lengths. For AC inductive loads, place a properly rated MOV across the load in parallel with a series RC snubber. Use a 0.01 to 0.1 mF pulse film capacitor (foil polypropylene recommended) of sufficient voltage, and a 47 Ω, ? W carbon resistor. For DC inductive loads, place a diode across the load (PRV gt; DC supply, 1N4006 recommended) with (+) to cathode and (-) to anode (the RC snubber is an optional enhancement).

　　Specifications

　　INPUT

　　Ranges: Field configurable, see table

　　Impedance: gt;1 MΩ

　　Input Bias Current (Burnout Detect): lt;1.5 μA

　　Overvoltage: ±10 V differential

　　Common Mode (Input to Ground): 600 Vac or 1000 Vdc max

　　LED Indications:

　　Input Range (Green);

　　gt; Input: 8 Hz flash

　　lt;0% Input: 4 Hz flash

　　Setpoint (Red): Tripped; Solid red (one LED for each setpoint)

　　Limit Differential (Deadband): 0.25% to 50% of span

　　Response Time:

　　Dynamic Deadband: Relay status will change when proper setpoint/process condition exists uninterrupted

　　for 100 msec

　　Normal Mode (Analog Filtering): lt;250 msec (10 to 90%)

　　Setpoint:

　　Effectivity: Setpoints are adjustable over of input span

　　Repeatability (Constant Temp): ±0.2% for inputs gt; 0°C; ±0.3% for inputs lt; 0°C

　　Stability:

　　Line Voltage: ±0.01%/% max

　　Temperature: ±0.05% of full scale/°C max

　　Common Mode Rejection (DC to 60 Hz): 120 dB

　　Isolation: 1000 Vdc between contacts, input and power

　　ESD Susceptibility: Meets IEC 801-2, Level 2 (4 KV)

　　Humidity:

　　Operating: 15 to 95% RH @ 45°C (113°F)

　　Soak: 90% RH for 24 hours @ 65°C (149°F)

　　Temperature Range:

　　Operating: 0 to 60°C (32 to 140°F)

　　Storage: -15 to 70°C (5 to 158°F)

　　Power: 120/240 Vac ± 10%, 50 to 60 Hz able, 2 W typical, 5 W max

　　Relay Contacts: 1 SPDT (1 Form C) per setpoint

　　Current Rating (Resistive):

　　120 Vac: 5A

　　240 Vac: 2A

　　28 Vdc: 5A

　　Material: Silver-Cadmium Oxide

　　Electrical Life: 105 operations at rated load (external relay contact protection is required for use with inductive loads)

　　Mechanical Life: 107 operations

　　Latch Reset Time: 5 seconds (with power removed)

　　Weight: 291 g (0.64 lb)

　　产品编号产品描述

　　SMLA-TC Thermocouple input field configurable limit alarm

　　Accessories

　　SKT-DR-11P 11-pin socket, DIN rail mount

　　SKT-SM-11P 11-pin socket, surface mount

　　SM-RAIL-2 35 mm DIN rail, 2 m (6.6') length

　　SMRS Retaining spring (secures limit alarm module into DIN rail or surface mount socket)

　　产品编号

　　SMLA-TC

　　Accessories

　　SKT-DR-11P

　　SKT-SM-11P

　　SM-RAIL-2

　　SMRS

　　SMLA-1

　　SMLA-2

　　SMLA-TC

　　SKT-DR-11P

　　SKT-DR-8P

　　SKT-SM-11P

　　SKT-SM-8P

　　SKT-DR-11P

　　SKT-DR-11P美国OMEGA

　　SKT-DR-11P美国OMEGA 新相关产品：RD9912美国OMEGA

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