Ronan X120 - Manual (Page 12)

Page 9 of 12
7.1 SW2-6
SW2-6 = ON 9600 Baudrate
SW2-6 = OFF 1200 Baudrate
7.2 SW2-7
Position 7 of SW2 is to enable (SW2-7 ON) or disable (SW2-7 OFF) the input channels tests. Refer to
section 3.2 for more information.
7.3 SW2-8
Position 8 of SW2 is for setting the multiplexer as the master or slave. If there are more than one
multiplexers connected together, set only one of them as the master (SW2-8 ON) and the others as the
slave (SW2-8 OFF).
7.4 SW3-1 to SW3-8
These switches are for spares.
8.0 INPUT LOGIC MODULES
There are 48 filed contact inputs on each input module and each of them is connected to a full wave bridge rectifier
circuit. Two input resistors (R2 & R3) have been added to each circuit for limiting the current and the outputs.
Bridge rectifiers are connected to the opto-isolators which provide both noise immunity and voltage protection for
the internal circuitry. The oto-isolators are then connected to analog delay circuits, which reduce the effects of line
voltage transients. Every 8 outputs from the delay circuits are then connected to an associated line of the octal
buffer which can be read by the controller board.
Each field contact input can be set for dry or live voltage input. Install a burg jumper on position (A) to set the
field contact input to live voltage or install two burg jumpers on positions B & C to set it to dry contact input.
Refer to sheet two of the X120D21 drawing to see how it works.
There are two types of input logic modules, X120-1001 which is equipped with standard input terminals and the
X120-1005 which is equipped with quick-disconnect input terminals. All the other terminals and input circuitry
are the same on both the X120-1001 and X120-1005.
9.0 REFERENCED DRAWINGS
X120-1001 Field Assembly
X120-1000 Multiplexer X120
X120D21 X120-DT Multiplexer Outline & Wiring Information
X120D37 X120-ST Field Multiplexer Assembly
X120C15 X120 to X120 Daisy Chain Cable Assembly
X120C16 X110 to X120 Cable Assembly
X120C36 X120 Extension Cable
These drawings can be found at the end of this manual.