TS 21 I-HC User Manual
Vighnaharta Technologies Pvt. Ltd
Page
6
of
19
Connector CON2:
Pin No.
Description
9.
D+ (RS 485 data +)
10.
D- (RS485 data -)
11.
C+ (Current O/P +)
12.
C- (Current O/P -)
13.
A-o/p (Voltage O/P)
14.
GROUND
Modbus Communication:-
S.NO
function code
address
function
1
1
101
Read DO2 status High Alarm
1
102
Read DO1 status Low Alarm
*2
2
1
Read DI
3
3
1001/1
Read LEL %
4
1001/1
Read LEL %
4
3
1002/2
Read Threshold Low
3
1003/3
Read Threshold High
5
4
1002/2
Read Threshold Low %
4
1003/3
Read Threshold High %
6
5
101
Write D02 High Alarm
5
102
write D01 Low Alarm
7
6
1002
Write Threshold Low %
6
1003
Write Threshold High %
Connecting wires
•
Take out the wires from supply, relay output and RS 485 port.
•
Make the connections for relay and RS 485 as mentioned in above table.
•
Take out wires from output and connect it to desired instrument.
•
Insert power adapter to the mains socket.
Operation
When unit is power ON, it goes in to an initial warm up period of 200 seconds. After this period is
over, unit enters into scan mode when it continuously monitors gas concentration level in the
atmosphere. When gas concentration exceeds low or high alarm threshold levels, relay output
changes accordingly. It shows gas concentration level between 0 and 100 % LEL with LED
indication on front panel. TS21I PPM has two settable alarm levels. Low alarm level and High alarm
level.
It uses four magnetic keys which operate using single magnetic stylus to do settings like low / high
alalrm levels, relay out put type and so on.
