Ammonia Detector - Manual
NH3/ENH3
April.10
Automatikprodukter
Electrochemical Transmitter
5.5
Addressing, only for GCD-05_Bus Mode
In the GCD-05_Bus mode each transmitter gets its communication address.
In the standard version with the communication connector X12, addressing is done by means of the GCD-05 Service
Tool or by the GCD-05 Configuration and Calibration Software.
See user manual of the Service Tool or of the Configuration and Calibration Software.
In the manual addressing version which can be identified by the address switch being equipped, there is a maximum
of 60 addresses to be selected. See fig. 3.
The jumper is responsible to define the address group and the switch to define the address according to the following
table
Switch Jumper pos. 01 Jumper pos. 02 Jumper pos. 03
Jumper pos. 04
position
= address
= address
= address
= address
0
inactive
inactive
inactive
inactive
1
01
16
31
46
2
02
17
32
47
3
03
18
33
48
4
04
19
34
49
5
05
20
35
50
6
06
21
36
51
7
07
22
37
52
8
08
23
38
53
9
09
24
39
54
A
10
25
40
55
B
11
26
41
56
C
12
27
42
57
D
13
28
43
58
E
14
29
44
59
F
15
30
45
60
5.6
Option Relay Output
The two relays are activated in dependence of the gas concentration. If the gas concentration exceeds the adjusted
alarm threshold, the corresponding relay switches on.
If the gas concentration falls below the threshold minus hysteresis, the relay switches off again.
The contact function for relay 2, NC (normally closed) or NO (normally open), can be selected via the jumper NO/
NC. See fig 1 and 3. Relay 1 is equipped with a change-over contact.
Via the ModBus interface the two alarm thresholds and the hysteresis are freely adjustable at the PC within the
measuring range.
The procedure can be read from the user manual ”ModBus Software”.
The following parameters are factory-set.
Alarm threshold 1 = Relay 1:
80 ppm
Alarm threshold 2 = Relay 2:
250 ppm
Switching hysteresis:
15 ppm
