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I/O modules
Digital I/O module
Digital inputs (DI1–DI4)
Optocouplers with internal 24 VDC power supply. Control with
floating contacts, with external voltage 12–24 VDC or with
open collector drivers PNP or NPN.
Digital outputs (DO1–DO4)
Floating double-throw contacts, max. contact load rating
30 VDC / 1 A
Relays must at all times be operated within the specified data
range. Inductive or capacitive loads are to be connected with
suitable protective measures (self-induction recuperation
diodes for inductive loads and series resistors for capacitive
loads).
Terminal assignment
Digital input and output signals
Failure
Maintenance request
Maintenance mode
Overall status
Start automatic calibration
Stop automatic calibration
Disable automatic calibration
Sample gas valve
Zero gas valve
Span gas valves 1–5
2)
Pump on / off
Limit 1
Limit 2
Limit 3
Limit 4
Limit 5
Limit 6
Limit 7
Limit 8
Limit 9
Limit 10
Measuring range switch-over
Measuring range feedback
Bus DI 1–8
3)
External failure
External maintenance request
1) Factory-set, can be changed by on-site configuration
2) When a pump (integral gas feed) is installed
3) Multiple external status signals can be configured
depending on the number of free digital inputs.
Electrical connections
See connection diagram
Design: 2x12-pin terminal strip. Observe the notes regarding
I/O module connection (see page 17)!
Relays are shown in the unpowered state. The unpowered
state is the failure mode.
10/24-4. 1 0 EN Rev. 9
Standard assignment
digital I/O module
1
2
DO1
DI1
DI2
DO4
DO2
DO3
DO1
DO2
DO3
DO4
DI3
3)
DI4
EasyLine EL3000 Series Data Sheet
Connection diagram
DI4
DI3 DI2 DI1
1
3
5
2
4
6
1
DI4 -
2
3
GND
24V
DI3 -
5
1)
6
4
GND
24V
7
DI2 -
8
9
GND
24V
11
DI1 -
12
10
GND
24V
13
DO4 NO
15
17
14
DO3 NO
16
18
19
DO2 NO
21
23
DO1 NO
20
22
24
DO4
DO3 DO2 DO1
7
9 11 13 15 17 19 21 23
8 10 12 14 16 18 20 22 24
+
12-24 V
+
12-24 V
+
12-24 V
+
12-24 V
max. 30 V / 1 A
Common
NC
max. 30 V / 1 A
Common
NC
max. 30 V / 1 A
Common
NC
max. 30 V / 1 A
Common
NC
19
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