Omega Engineering OM-SQ2020 Series User Manual page 17

Sensor Power Wiring
Unregulated Logger
Supply Output
Regulated 5V Output
I/O Socket Wiring
ALARM
O/P
SLOW PULSE
I/P 1-2
External Memory Card Reader
The external MMC/SD card slot is located inside the
battery compartment.
28923
Block E
Negative
EVENT/STATE
I/P 1-8
-ve
FAST PULSE
I/P 1-2
V1(+ve)
V1(-ve)
PIN 1
+ve
Auxiliary Output
Max. 500mA
High Voltage Input
Block F
Pin Connection
1 Event/State Input 1
2 Event/State Input 2
3 Event/State Input 3
4 Event/State Input 4
5 Event/State Input 5
6 Event/State Input 6
7 Event/State Input 7
8 Event/State Input 8
9 Ground
10 Alarm Output A
11 Alarm Output B
12 Alarm Output C
13 Alarm Output D
14 Auxiliary Output +ve
15 Auxiliary Output +ve
16 Auxiliary Output -ve
17 Auxiliary Output -ve
18 Ground
19 Ground
20 Ground
21 Fast Pulse Input 1
22 Fast Pulse Input 2
23 Slow Pulse Input 1
24 Slow Pulse Input 2
25 No Connection
Version 1.2 - October 08
V2(-ve)
V2(+ve)
Page 17