TPS miniCHEM-pH - Terminal Connections

Page 11
3.4 Terminal Connections
Note: The power connections detailed below are for normal mains power. Refer
to section 11.3 for power wiring details when the 12V DC power option is fitted.
Terminal No. Connection Colour
1 12K ATC Sensor * Black
2 12K ATC Sensor Common * Clear
3 Solution Guard Green of ATC Sensor
OR:
Solution guard rod, if no
ATC Sensor is installed.
4 pH Shield (if fitted) Green
5 pH Reference Black
6 pH Signal Clear or White
7 +ve of current or voltage output Customer-defined
8 -ve of current or voltage output Customer-defined
9 No Connection
10 Normally Closed contact of
(optional) relay output
Customer-defined
11 Common contact of (optional) relay
output
Customer-defined
12 Normally Open contact of
(optional) relay output
Customer-defined
13 240V AC Active input Brown (standard colour)
14 Duplicate 240V AC Active contact.
See section 11.3.
Brown (standard colour)
15 240V AC Earth input Green (standard colour)
16 Duplicate 240V AC Earth contact.
See section 11.3.
Green (standard colour)
17 240V AC Neutral input Blue (standard colour)
18 Duplicate 240V AC Neutral
contact. See section 11.3.
Blue (standard colour)
∗∗ If an ATC sensor is not fitted, then a 12K resistor may be connected between
terminals 1 and 2 to simulate 25
o
C. If this is done, then a stainless steel
solution guard rod must be connected to terminal 3.