Impulse SCM9B-1000_2000 Series - Manual (Page 2)

Isolated Intelligent Signal Conditioning Products SCM9B
For information call 800-444-7644 102
Analog
• Single channel analog input.
• Maximum CMV, input to output at 60Hz: 500Vrms.
• Leakage current, input to output at 115Vrms, 60Hz: <2µArms.
• 15-bit measurement resolution.
• 8 conversions per second.
• Autozero & autocalibration—no adjustment pots.
Digital
• 8-bit CMOS microcomputer.
• Digital scaling, linearization and calibration.
• Nonvolatile memory eliminates pots and switches.
Digital filtering
• Small and large signal with user selectable time constants from 0 to 16 seconds.
Events counter
• Up to 10 million positive transitions at 60Hz max., filtered for switch debounce.
Digital inputs
• Voltage levels: ±30V without damage.
• Switching levels: High, 3.5V min., low, 1.0V max.
• Internal pull up resistors for direct switch input.
Digital outputs
• Open collector to 30V, 30mA max. load.
Alarm outputs
• HI/LO limit checking by comparing input values to down-loaded HI/LO limit values
stored in memory.
• Alarms: latching (stays on if input returns to within limits) or momentary (turns off if
input returns to within limits.)
Communications
• Communications in ASCII via RS-232C, RS-485 ports.
• Selectable baud rates: 300, 600, 1200, 2400, 4800, 9600, 19200, 38400.
• NRZ asynchronous data format; 1 start bit, 7 data bits, 1 parity bit and 1 stop bit.
• Parity: odd, even, none.
• User selectable channel address.
• ASCII format command/response protocol.
• Up to 124 multidrop modules per host serial port.
• Communications distance up to 10,000 feet (RS-485).
• Transient suppression on RS-485 communications lines.
• Communications error checking via checksum.
• Can be used with "dumb terminal".
• Scan up to 250 channels per second.
• All communications setups stored in EEPROM.
Power
• Requirements: Unregulated +10V to +30VDC, 0.75W max (1500/2500, 2.0W max.)
• Internal switching regulator.
• Protected against power supply reversals.
Environmental
• Temperature Range: Operating –25°C to +70°C.
Storage –25°C to +85°C.
• Relative Humidity: 0 to 95% noncondensing.
1100/2100 Voltage Input Modules
• Voltage ranges: ±10mV, ±1V, ±5V, ±10V, ±100VDC.
• Resolution: 0.01% of FS (4 digits).
• Accuracy: ±0.02% of FS max.
• Common mode rejection: 100dB at 50/60Hz.
• Zero drift: ±1 count max (autozero).
• Span tempco: ±50ppm/°C max.
• Input burnout protection to 250VAC .
• Input impedance:
≤ ±1V input = 100M Ω min.
≥ ±5V input = 1M Ω min.
• 1 Digital input/Event counter, 2 Digital outputs.
Specifications
Typical at 25°C and nominal power supply unless otherwise noted
1200/2200 Current Input Modules
• Current ranges: ±1mA, ±10mA, ±100mA, ±1A, 4-20mADC.
• Resolution: 0.01% of FS (4 digits), 0.04% of FS (4-20mA).
• Accuracy: ±0.02% of FS, 0.04% of FS (4-20mA).
• Common mode rejection: 100dB at 50/60Hz.
• Zero drift: ±1 count max (autozero).
• Span tempco: ±50ppm/°C max. (±1A = ±80 ppm/°C max.)
• Voltage drop: ±0.1V max.
• 1 Digital input/Event counter, 2 Digital outputs.
1300 Thermocouple Input Modules
• Thermocouple types: J, K, T, E, R, S, B, C (factory set).
• Ranges: J = –200°C to +760°C B = 0°C to +1820°C
K = –150°C to +1250°C S = 0°C to +1750°C
T = –200°C to +400°C R = 0°C to +1750°C
E = –100°C to +1000°C C = 0°C to +2315°C
• Resolution: ±1°.
• Overall Accuracy (error from all sources) from 0 to +40°C ambient:
±1.0 °C max (J, K, T, E).
±2.5 °C max (R, S, B, C)(300°C to FS).
• Common mode rejection: 100dB at 50/60Hz.
• Input impedance: 100M Ω min.
• Lead resistance effect: <20µV per 350 Ω .
• Open thermocouple indication.
• Input burnout protection to 250VAC.
• User selectable °C or °F.
• Overrange indication.
• Automatic cold junction compensation and linearization.
• 2 Digital inputs, Event counter, 3 Digital outputs.
1400 RTD Input Modules
• RTD types:
α = .00385, .00392, 100 Ω at 0°C,
.00388, 100 Ω at 25°C.
• Ranges: .00385 = –200°C to +850°C.
.00392 = –200°C to +600°C.
.00388 = –100°C to +125°C.
• Resolution: 0.1°.
• Accuracy: ±0.3°C.
• Common mode rejection: 100dB at 50/60Hz.
• Input connections: 2, 3, or 4 wire.
• Excitation current: 0.25mA.
• Lead resistance effect: 3 wire - 2.5°C per Ω of imbalance.
4 wire - negligible.
• Max lead resistance: 50 Ω .
• Input protection to 120VAC .
• Automatic linearization and lead compensation.
• User selectable °C or °F.
• 1 Digital output.
1450 Thermistor Input Modules
• Thermistor types: 2252
Ω at 25°C, TD Series
• Ranges: 2252 Ω = –0°C to +100°C.
TD = –40°C to +150°C.
• Resolution: 2252 Ω = 0.01°C or F.
TD = 0.1°C or F
• Accuracy: 2252 Ω = ±0.1°C.
TD = ±0.2°C
• Common mode rejection: 100dB at 50/60Hz.
• Input protection to 30VDC .
• User selectable °C or °F.
• 1 Digital input/ Event counter, 2 Digital outputs.