8400100.qxp 3/20/2006 3:21 PM Page 168 Fl a t P a c k Serie s 260A Loop-Powered Limit Alarm Relay Trips 260A Relay NC + 4-20mA COM IN Input + NO Device Special Features Performance Reference test conditions Excellent accuracy and stability ensure reliable Input: 4 to 20mA; Setpoint at 20mA (1.0VDC); measurements in harsh industrial environments. Failsafe High Alarm; Deadband 0.5%; Ambient 77°F (25°C). RFI and EMI resistance minimize the effects of environmental noise. Input Input Loop-power design and low 4.5V DC voltage 4 to 20mA input. Power to operate the loop-alarm is drop enable easy installation. 260A Series derived from the input signal loop. Input current should be limited to 50mA or less to prevent damage Hi/low failsafe option trips alarms above or Failsafe to the alarm. Alarm input is reverse polarity protected. below setpoint. Limit Alarms Input Impedance Automatic or manual reset option 225 ohms at 20mA (input voltage drop: 4.5V DC) typical. The 260A accepts a 4 to 20mA input signal and permits latching alarms. Setpoint adjust provides a dry contact relay output if the input The alarm setpoint is adjustable from 0 to 125% of Adjustable setpoint (4 to 24mA) handles more input current span, readable as 0V DC (0mA) to 1.2V exceeds a user-defined setpoint limit. Power is applications. DC (24mA) at terminals. Resolution is 0.1% of span, received from the input loop. continuous, on 22-turn potentiometer. The setpoint LED gives visual indication of alarm status. voltage represents the true trip-point to within ±0.5% These alarm relays are ideal for local failsafe of span. By monitoring the input current and adjust- alarming with existing process transmitters. They Six deadband levels (DIP switch select) offer ing the setpoint pot, the setpoint may be set to within are easily installed on a process loop because further flexibility. 0.1%. they do not require an additional power supply Deadband adjust (hysteresis) 50mS response time delivers fast alarm and feature a very low voltage burden. A long Field selectable deadband: 0.5, 1, 2, 4, 8 and 16 notification. list of features allows the 260A to adapt to most percent of span, set via an internal DIP switch. applications. Compact, 1-inch wide housing uses less space Continued on the next page. for easier installation. Input 4 to 20mA DC Output 2A SPDT dry contact relay Power Requirement 4.5V DC (loop-powered) A C C C Tel: 248-295-0880 Fax: 248-624-9234 e-mail: sales@acromag.com www.acromag.com 168 Flat Pack Flat Pack 8400100.qxp 3/20/2006 3:21 PM Page 169 Limit Alarms n Performance n Ordering Information Continued from the previous page. Select one option from each column. Example: 260A-20MA-SN-DIN-NCR-C To order factory calibration, append “-C” to end of model number. Specify ranges on order. n Output/Relays Output Base Input Output Mounting Approval Single-Pole, Double Throw (SPDT), Form C, dry contact relay. Isolated contacts rated at 2A (3A max.), 28V DC 260A -20MA -SN -DIN -N4 -NCR or 120V AC resistive. -ST -N12 - Relay -SM -IH Contact material: Fine silver. -IHW Breakdown: 500V AC across contact gaps. Life: 1 Million operations at 1 amp, 28V DC. See Ordering Notes for model number descriptions. Operation: failsafe, coil normally energized, de-energizes on alarm. n Environmental n Ordering Notes Alarm LED Ambient temperature range The LED will be ON if the setpoint is exceeded (relay -13 to 167°F (-25 to 75°C). Input Option not energized). -20MA: 4 to 20mA Ambient temperature effect Alarm action Less than ±0.01% of output span per °F (±0.018% Failsafe high or low alarm. Can be field configured to Output Option per °C) over the ambient temperature range for trip on increasing signal (Failsafe HI Alarm), or decreas- -SN: SPDT dry contact relay reference test conditions. ing signal (Failsafe LOW Alarm), via an internal DIP Isolation switch (S2). Set S2 to C2 position for High Alarm, or Mounting options The output contacts are isolated from the input/power the C1 position for Low Alarm. Relay is normally Mountings circuits for common-mode voltages up to 250V AC, or energized and becomes de-energized on alarm or sig- -DIN: DIN rail G or T mount 354V DC off ground, on a continuous basis (will with- nal failure. -ST: SNAPTRACK mount stand 1500V AC dielectric strength test for one Alarm latch -SM: Surface-mount minute without breakdown). This complies with test Automatic Reset (Non-Latching or Latching). Latch requirements outlined in ANSI C39.5-1974 for the External housings action enabled via internal DIP switch. In the Non- voltage rating specified. -N4: NEMA 4, water-tight, holds two Latching mode, the alarm will reset to its non-alarm Noise rejection state as soon as the signal is outside of the selected -N12: NEMA 12, oil-tight, holds two Normal mode: 10dB at 60 Hz, typical. deadband. In the Latched mode, the alarm will reset -IH: Rugged pipe mount housing, water-tight when the local Reset button is pushed. Latch action RFI resistance -IHW: Same as -IH above with window can be locked out by pushing down and turning the Unit will not trip, under influence of RFI, when input is Reset button 1/4-turn to lock it in its depressed state, ±0.5% of input span from setpoint voltage, with RFI Approval Options or via the on-board DIP switch. field strengths of up to 10V/meter at frequencies of -NCR: No certification required 27, 151 and 467 MHz. Accuracy - Repeatable within ±0.1% of input span for constant EMI resistance conditions (25°C). Unit will not trip when input is ±0.25% of input span - from setpoint voltage with switching solenoids or locations: Class I; Groups B, C, D Class II; Groups E, Response time commutator motors. F, G. NOTE: Only available with explosion-proof The relay contacts switch from closed to open within housing options (-IH, or -IHW). 50mS for a step input change from 10% of span on Surge withstand capability (SWC) one side of the alarm point, to 5% of span on the Input/Output terminations rated per ANSI/IEEE C37.90- Ordering Notes other side of the alarm point, for high or low alarms. 1978. Unit is tested to a standardized test waveform † Units are shipped separately from any optional that is representative of surges (high frequency transient Minimum time between events: 100mSec. enclosures (i.e. units are not installed in any electrical interference), observed in actual installations. external housing). A †† Units shipped installed in external enclosure. C. C. Accessories Power supplies n Physical See Power Supplies on Page 199. Construction DIN RAIL 3.0 Circuit board: Military grade FR-4 epoxy glass DIN RAIL 16.7 circuit board DIN rail strip, Type T, 3 inches (75mm) or Terminals: Compression type, 14 AWG max. 16.7 inches (425mm) DIP switch contacts: Gold flash over Nickel contacts. Printed circuit board coating: Fungus resistant acrylic 20RM-16-DIN conformal coat. 19" rack-mount kit with DIN rail. Mounting position: Position insensitive. Holds sixteen 260A alarms. Tel: 248-295-0880 Fax: 248-624-9234 e-mail: sales@acromag.com www.acromag.com 169