Thermo Fisher Scientific Alpha pH 190 (In the process of updating the brand guideline & product image) - Manual (Page 10)

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3.2 Back Panel
The back panel consists of four different connectors that can be
used with removable terminal blocks (included):
+
4 - 2
0 m
A
12
19
3 11
18
2 10
17
1 9
16
8
15
7
14
6
13
5 4
NC NC NC NC
-
4 -
20
mA
RE
L
A
Y 1 -
NO
R
E
LA
Y
1 -
POL
E
RE
L
A
Y 1 -
NC
Pt 1
00 -
GN
D
R
E
LA
Y
2 - N
O
P
t 10
0 - I
N
RE
L
A
Y 2 -
PO
LE
Pt 1
00 -
SE
NSE
GR
O
U
N
D
RE
L
A
Y 2 -
NC
N L
IQ
U
ID G
N
D
L
J2 J1
J3 pH/ORP
WARNING
D
B
C
A
A. 3 pin connector (for power supply)
B. 9 pin connector (for relays)
C. 7 pin connector (for temperature sensor)
D. BNC connector (for pH or ORP electrode)
A. 1. L- Live
2. N- Neutral
3. E- Earth Ground
C.
13. Pt 100- SENSE
14. Pt 100- IN
15. Pt 100-GND
16. NC
17. NC
18. NC
19. NC
B.
4. Liquid GND
5. RELAY 2- NC
6. RELAY 2- POLE
7. RELAY 2- NO
8. RELAY 1- NC
9. RELAY 1- POLE
10. RELAY 1- NO
11. – 4 to 20 mA
12. +4 to 20 mA D.
BNC for pH/ORP