Module Architecture - Pickering 40-617A User Manual

SECTION 4 - PROGRAMMING GUIDE
MODULE ARCHITECTURE 40-617A: MULTIPLEXER MODULE
The 40-617A-021 Multiplexer Module utilises an effective array of 89 SPST relays. In addition 12 uncommitted
SPST relays are fitted. In the default state all relays are open circuit. Energising a particular relay creates a signal
path between the common terminal and the corresponding channel terminal(s). The relay module's switching
architecture is shown in the diagram below:
Multiplexer Bank 1
Twenty one Sub-units are used to control the module's relays as shown in the tables. 18 Sub-units of 3 bits control
the multiplexer channel relays, 1 Sub-unit of 18 bits controls the Isolation switches, 1 Sub-unit of 17 bits controls
the Inter-Bank linking switches and 1 Sub-unit of 12 bits controls the uncommitted relays. Enabling a particular bit
closes the C to A signal path of that relay resulting in an electrical connection.
The Sub-units used to control the module's relays are as detailed below and in Table 4.1.
Sub-unit
1 -18
19
20
21
18 BANK, 3 CHANNEL, 1-POLE MULTIPLEXER MODULE 40-617A
Page 4.2
Multiplexer Bank 2
12 off SPST Uncommitted Relays
C
SPST Relay Connections
Type Bits
3
MUX
18
SWITCH
17
SWITCH
12
SWITCH
Multiplexer Bank 18
A
Function
Multiplexer
Isolation
Inter-bank Link
Uncommitted relays
pickering