Impulse SCM9B-3000_4000 Series - Manual (Page 2)

SCM9B
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Isolated Intelligent Signal Conditioning Products
SCM9B
Analog Output
• Single channel analog output.
Voltage: 0-1V, ±1V, 0-5V, ±5V, 0-10V, ±10V.
Maximum output current: 5mA
Current: 0-20mA, 4-20mA.
Compliance Voltage: 12V
• Output isolation: 500Vrms.
• 12-bit output resolution.
• Accuracy (Integral & Differential Nonlinearity): 0.1% FSR (max).
• Zero drift: ±30µV/°C (Voltage Output max).
±0.2µA/°C (Current Output max).
• Span tempco: ±25ppm/°C max.
• 1000 conversions per second.
• Settling time to 0.1% FS: 300µs typ (1ms max).
• Output change manual mode (–FS to +FS): 5s.
• Programmable output slope (4000): 0.01V/s (mA/s)
to 10,000V/s (mA/s).
• Current output voltage compliance: 12V.
• Voltage Output drive: 5mA min, 10mA max.
Analog Output Readback (4000)
• 8-bit analog to digital converter.
• Accuracy over temperature (–25 to +70°C): 2.0% FS max.
Digital
• 8-bit CMOS microcomputer.
• Digital scaling and calibration stored in nonvolatile memory.
• Programmable High/Low output limits.
• Programmable data scaling (4000).
• Programmable starting value (4000).
• Programmable watchdog timer provides orderly shutdown in the event of
host failure (4000).
Digital Inputs
• Three digital inputs per module.
• Voltage levels: ±30V without damage.
• Switching levels: High, 3.5V min., Low, 1.0V max.
• Internal pull up resistors for direct switch input.
Specifications
Typical at 25°C and nominal power supply unless otherwise noted
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/host communications port.
• Communications distance up to 10,000 feet (RS-485).
• Can be used with “dumb” terminal.
• All communications setups (address, baud rate, parity)
stored in nonvolatile memory using EEPROM.
• Checksum can be added to any command or response.
Power
• Requirements: Unregulated +10V to +30VDC, 0.75W max. (Voltage Output),
1.0W max. (Current Output).
• Internal switching regulator.
• Protected against power supply reversals.
Mechanical
• Dimensions: See dimension drawing.
• Case: ABS with captive mounting hardware.
• Connectors: Screw terminal barrier plug (supplied).
Replace with Phoenix MSTB 1.5/10 ST 5.08 or equivalent.
Environmental
• Temperature Range: Operating –25°C to +70°C.
Storage –25°C to +85°C.
• Relative Humidity: 0 to 95% noncondensing.
Specifications are subject to change without notice.
Model Description
Voltage Output
SCM9B-3121/4121 ±1V Output/RS-232C Input
SCM9B-3122/4122 ±1V Output/RS-485 Input
SCM9B-3131/4131 ±5V Output/RS-232C Input
SCM9B-3132/4132 ±5V Output/RS-485 Input
SCM9B-3141/4141 ±10V Output/RS-232C Input
SCM9B-3142/4142 ±10V Output/RS-485 Input
SCM9B-3161/4161 0 to 1V Output/RS-232C Input
SCM9B-3162/4162 0 to 1V Output/RS-485 Input
SCM9B-3171/4171 0 to 5V Output/RS-232C Input
SCM9B-3172/4172 0 to 5V Output/RS-485 Input
SCM9B-3181/4181 0 to 10V Output/RS-232C Input
SCM9B-3182/4182 0 to 10V Output/RS-485 Input
Model Description
SCM9B-3251/4251 0 to 20mA Output/RS-232C Input
SCM9B-3252/4252 0 to 20mA Output/RS-485 Input
SCM9B-3261/4261 4 to 20mA Output/RS-232C Input
SCM9B-3262/4262 4 to 20mA Output/RS-485 Input
Current Output
Ordering Information