Page 4.3
REED RELAY MODULE 40-110/115/120/125
pickering
SECTION 4 - PROGRAMMING GUIDE
MODULE ARCHITECTURE - 40-115-021/121
One sub-unit is used to control all the module’s relays as shown below. Enabling a particular bit closes the C to A
signal path.
40-115-021 (16 x SPST)
Sub-Unit
Bit
40-115-021 Signal Path
(with relay energised)
40-115-121 Signal Path
(with relay energised)
1
1
C1 to A1
C1 to A1
1
2
C2 to A2
C2 to A2
1
3
C3 to A3
C3 to A3
1
4
C4 to A4
C4 to A4
1
5
C5 to A5
C5 to A5
1
6
C6 to A6
C6 to A6
1
7
C7 to A7
C7 to A7
1
8
C8 to A8
C8 to A8
1
9
C9 to A9
C9 to A9
1
10
C10 to A10
C10 to A10
1
11
C11 to A11
C11 to A11
1
12
C12 to A12
C12 to A12
1
13
C13 to A13
C13 to A13
1
14
C14 to A14
C14 to A14
1
15
C15 to A15
C15 to A15
1
16
C16 to A16
C16 to A16
1
17
—
C17 to A17
1
18
—
C18 to A18
1
19
—
C19 to A19
1
20
—
C20 to A20
1
21
—
C21 to A21
1
22
—
C22 to A22
1
23
—
C23 to A23
1
24
—
C24 to A24
1
25
—
C25 to A25
1
26
—
C26 to A26
1
27
—
C27 to A27
1
28
—
C28 to A28
1
29
—
C29 to A29
1
30
—
C30 to A30
1
31
—
C31 to A31
1
32
—
C32 to A32
The 40-115-021 is an array of 16, and the 40-115-121 is an array of 32 uncommitted SPST relays. In the default
state, all signal paths are open. Energising a particular relay creates a signal path between the C and A terminals.
The relay module’s switching architectures are shown in their default state in the diagram below:
40-115-121 (32 x SPST)
A16
C16
A3
C3
A2
C2
A1
C1
A31
C31
A4
C4
A3
C3
A2
C2
A1
C1
A32
C32
