9
About The Meter
2
2.6 BACK OF THE METER
Figure 2-2 shows the label describing the connectors on the back of the meter. Table 2-1
on the following page gives a brief description of each connector at the back of the
meter.
Figure 2-2. ac Power Connector Label (with dc Power detail)
+R
RTD INPUT*
ANALOG OUT*
TB1
RELAY 1
RELAY 2
ISOLATED*
*
= CONNECT TO LOW VOLTAGE LIMITED ENERGY CIRCUITRY ONLY.
ANALOG OUT
A
EXT RETURN: REMOVE
S4-A
& CONNECT EXT RTN TO
"-R"
NO EXTERNAL RETURN: INSTALL
S4-A
TB2
pH INPUT*
RTN
VOLT
CURR
TB5
POWER & INPUT CONNECTIONS (pH)
S4
DC
TB1
AC
9
8
7
N/C
+
-
N.C.2
N.C.1
N.O.1
COM1
COM2
N.O.2
VOLT
RTN
CURR
N/C
-R
L
N
dc-power connector
label detail
3
2
1
6
5
4
9
8
7
12*
11*
10*
3*
2*
1*
3*
2*
1*
