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Technical Specifications:
Supply Voltage
Consumption
Analog Inputs
Digital Outputs
Analog Outputs
Digital Inputs
MOD CIM 3765: Interface USB
The USB interface board is located on the rear panel of the drawer. It is a USB connection between
the control board digital power drawer and a computer. On this board is also mounted bi-color LED
signaling drawer power.
The front panel LED lights orange during the activation cycle of the power drawer. If no alarms signal
were detected this same LED turns lights green. If otherwise, and some alarms signal is present, it
starts to blinking in red.
CIM 3886 MOD: +24V Power Supply and V & I readings
The module 3886 is a circuit CIM which has functions of performing readings of current, voltage. It
converts the voltage of +50 V to +24 VDC and also filter the +50 V that is used to power the fans, this
+50V DC line is fuse protected.
The conversion from +50V to +24V uses an independent circuit (MOD CIM 3906) using the buck
regulator topology. This circuit uses 2 power MOSFETs and one coils, operating at the 125kHz
switching frequency.
This board also has the function of protecting the DC / DC converter (MOD 4812) in case of an over-
current event. This protection is performed by voltage comparison. When one branch of the sensor
network suffers a increase of the current value, the circuit turn its stage and the proction acts
immediately.
The MOD CIM 3886 is composed of the following boards:
- Card readings: CIM 3869 and CIP 8722
- Board DC / DC converter: CIM 3906 and CIP 8680
© Linear Industries, Inc. All Rights Reserved
Parameter
AT71-250 Transmitter Owner's Manual
Specification
+15V
60mA
22
24
0
6
37/38
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