Pickering 40-290-021, Руководство пользователя

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Page 4.5
PROGRAMMABLE RESISTOR MODULES 40-290/291
pickering
SECTION 4 - PROGRAMMING GUIDE
MODULE ARCHITECTURE 40-291-121
Five sub-units are used to control the module’s relays as shown below. Enabling a particular bit closes the C to A
signal path of that relay.
Chain Sub-Unit Bit
40-291-121 Signal Path
(with relay energised)
Associated
Resistor
PCB
Resistor
1
1 1 C1.1 to A1.1 R1 R17
1 2 C2.1 to A2.1 R2 R18
1 3 C3.1 to A3.1 R3 R19
1 4 C4.1 to A4.1 R4 R20
1 5 C5.1 to A5.1 R5 R21
1 6 C6.1 to A6.1 R6 R22
1 7 C7.1 to A7.1 R7 R23
1 8 C8.1 to A8.1 R8 R24
2
2 1 C1.2 to A1.2 R1 R25
2 2 C2.2 to A2.2 R2 R26
2 3 C3.2 to A3.2 R3 R27
2 4 C4.2 to A4.2 R4 R28
2 5 C5.2 to A5.2 R5 R29
2 6 C6.2 to A6.2 R6 R30
2 7 C7.2 to A7.2 R7 R31
2 8 C8.2 to A8.2 R8 R32
3
3 1 C1.3 to A1.3 R1 R33
3 2 C2.3 to A2.3 R2 R34
3 3 C3.3 to A3.3 R3 R35
3 4 C4.3 to A4.3 R4 R36
3 5 C5.3 to A5.3 R5 R37
3 6 C6.3 to A6.3 R6 R38
3 7 C7.3 to A7.3 R7 R39
3 8 C8.3 to A8.3 R8 R40
4
4 1 C1.4 to A1.4 R1 R41
4 2 C2.4 to A2.4 R2 R42
4 3 C3.4 to A3.4 R3 R43
4 4 C4.4 to A4.4 R4 R44
4 5 C5.4 to A5.4 R5 R45
4 6 C6.4 to A6.4 R6 R46
4 7 C7.4 to A7.4 R7 R47
4 8 C8.4 to A8.4 R8 R48
The 40-291-121 Module utilises 32 SPST relays, and 16 changeover relays. In the default state all signal paths are
open circuit for the SPST relays with all resistors linked in the chains, and between the C and B terminals for the
changeover relays. Energising any relay creates a signal path between the C and A terminals of that relay. As the
SPST relays are energised the corresponding resistor is short circuited. The relay module’s switching architecture
is detailed in Figure 2.3. Relay connections are as shown below.
A C
SPST Relay Connections
Changeover Relays (DPST)
Sub-Unit Bit 40-291-121 Signal Path
(with relay energised)
5 1 C1.5 to A1.5
5 2 C2.5 to A2.5
5 3 C3.5 to A3.5
5 4 C4.5 to A4.5
5 5 C5.5 to A5.5
5 6 C6.5 to A6.5
5 7 C7.5 to A7.5
5 8 C8.5 to A8.5
5 9 C9.5 to A9.5
5 10 C10.5 to A10.5
5 11 C11.5 to A11.5
5 12 C12.5 to A12.5
5 13 C13.5 to A13.5
5 14 C14.5 to A14.5
5 15 C15.5 to A15.5
5 16 C16.5 to A16.5
A
C
B
DPST Relay Connections