MSA SUPREMA Touch, Инструкция по установке и обслуживанию, Страница: 117 / 309

SUPREMATouch 116
Description of the System
MSA
US
Instead of sensors, switching contacts can also be connected to the MCI module for signal input
via the sensor power supply terminal and the signal input. The signal to be evaluated now changes
between the ”closed circuit” state (approximately 4 mA) and the ”alarm signal” state (approximate-
ly 15 mA).
Functions:
Up to 8 MAI modules can be installed in one rack for the evaluation of 64 input signals.
MCI Module (Current Input Unit)
When the following input signals are to be processed, one of these modules must be plugged into
the MAI module for each input signal:
Functions:
• 8 locations for MPI, MCI, MFI or MSI modules
• 1 slot for the MAR module (redundancy)
• Display and operating elements (bridge current, zero, sensitivity)
• 12-bit ADC, 11 channels, measurement of the signal v sensor supply (24 VDC)
• Connection terminals for the sensors are on the MAT module (power supply, signals)
• Status LEDs for supply voltage, AD conversion, adjusting procedures.
• Sensors are monitored by evaluation of the measurement signals on the MDA module
• Data transfer to the MDA module over the SPI bus
• Euro card with a 96-way connector
MCI 0 ... 20 mA.
MCI BFE (BFE = Smoldering Fire Detection)
(Signal processing for 0 ... 20 mA especially for DF 8501, DF 8502,
DF 8510 fire detectors).
• Current/voltage source for active sensors with outputs of 0 (4) ... 20 mA.
• Short-circuit current limitation for the power supply to the sensors (0.7 ... 2 A).
• Current limitation for the 0 ... 20 mA signal input (approximately 30 mA).
• Multiplier resistor, 100 Ohm (0 ... 20 mA = 0.0 ... 2.00 V).
• Signal input, 0 ... 20 mA, contact, or 0 ... 24 V.