Honeywell ESSER Serial essernet Interface SEI1 - Page 57

Serial essernet
®
interface (SEI1)
FB 798819 / 05.18 57
Specifications
essernet
®
micro module
62,5 kBd
(Part No. 784840.10)
essernet
®
micro module
500 kBd
(Part No. 784841.10)
Operating voltage : + 5 V DC (internal)
Current consumption : approx. 150 mA @ 12 V DC
Network devices : max. 16 max. 31
Transmission speed : 62,5 KBd 500 KBd
Cable type : Telephone cable
I-Y(St)Y n x 2 x 0,8 mm
cable length max. 1000 m
IBM Type 1 max. 1000 m
IBM Type 2 (Earth cable)
max. 1000 m
IBM Type 6 (flexible) max.
200 m (between two network
devices)
Other cable types such as paper-wrapped cables, control lines (NYM) or smaller
cross-sections are not suitable. The cable must be twisted and shielded.
The signal wires are protected against interference through connection of the
cable shielding.
Setting the network address
The Network address is set as a decimal number by means of two rotary switches. Use an
appropriate screwdriver for setting switches S1 (address factor x 1) and switch S2 (factor x
10). The actual address is represented by the total of both values.
Adressing example e.g. address 9 or 21
Micro
module
address
Switch condition Address factor Value
Σ = S1 x 1 + S2 x 10
S2 S1
9
S1 = x 1
9 x 1 + 0 x 10 = 9
S2 = x 10
21
S1 = x 1
1 x 1 + 2 x 10 = 21
S2 = x 10
0
1
2
3
4
5
6
7
8
9
0
0
1
2
3
4
5
6
7
8
9
9
0
1
2
3
4
5
6
7
8
9
2
0
1
2
3
4
5
6
7
8
9
1