SPECIFICATIONS
SPECIFICATIONS
Input: 1 to 8 RTD’s (Resistance Temperature Detectors), 2 or 3-
wire. See part number coding on page 23 for details.
Input scan rate: 8 readings per second.
Input fault detection: Open or shorted circuit sounds alarm and locks out faulty
zone. Other zones are unaffected.
Input protection: ±30 VDC continuous from any input to ground.
Output: 5 independent trip points: 4 relays and one audible alarm.
Alarm may be programmed to sound when selected relays
trip.
Relays: Form C, SPDT
10 Amps @ 250 VAC/24 VDC Resistive
20 Amps make current
2500 VA breaking capacity
1/4 HP at 120 VAC motor load
Trip point hysteresis (deadband): Programmable from 2 to 20° (C or F).
Display: 0.56" (14mm) LED, 1°C or 1°F resolution. 16 LED
indicators.
Accuracy: ±2°C (±3°F) in 10 to 30°C (50 to 86°F) ambients. ±3°C
(±5°F) in 0 to 70°C (32 to 158°F) ambients.
Zone and relay labels: Replaceable from inside for custom labeling.
Supply power: AC Version:
115 or 230 VAC ±10%, 50/60 Hz. 15 Watts
maximum. Selector switch inside case.
DC Version:
24 VDC ±10%. 15 Watts maximum.
Power loss protection: Trip points, peaks, and program parameters stored in non-
volatile memory. Normal operation resumes when power is
restored.
Keyboard: 10 membrane type keys with audible feedback.
Programming: Programmable from front panel. Access to program mode
requires special key sequence. See sample setup worksheet
for complete list of program options.
Firmware fault protection: Watchdog circuit resets microprocessor if it fails to perform
program sequence.
Enclosure: ABS case; water and dust resistant front panel.
Ambient temperature rating: 0 to 70°C (32 to 158°F).
Connections: Plug-in terminal boards at rear accept wires to 14 AWG.
Leadwire Resistance Compensation: Up to 10 Ω per leadwire with no effect on reading. Contact
the factory if planning to use a safety barrier for use in
hazardous locations.
Mounting: 3/4 DIN (DIN43700). Panel-mounted in 5.51" x 7.32"
(140mm x 186mm). Extends behind panel 5.1" (130mm)
maximum.
Weight: 4 lbs. (1.8 kg.).
Minco Products, Inc. CT124 Instruction Manual
22
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