SPA
28
The Interface Solution Experts
Site-Programmable RTD &
Thermocouple Limit Alarm Trips
Connections
Figure 17 shows how to hook up the various inputs ac-
commodated by the TPRG SPA. Table 3 gives terminal
designations.
Operation
Once connected to sensors, annunciators (or other
discrete devices), and appropriate power, the SPA be-
gins to function according to its internal switch settings
and the configuration stored in its non-volatile internal
memory.
Figure 17. Connections for the TPRG SPA
1 2 3 4
5 6 7 8
10 11 12 13 14 15
TOP ROW
TERMINALS
MIDDLE ROW
TERMINALS
BOTTOM ROW
TERMINALS
+ –
1 2 3 4
1 2 3 4
1 2 3 4
1 2 3 4
1 2 3 4
1 2 3 4
1 2 3 4
SINGLE, 2, 3,
AND 4-WIRE
RTD HOOKUPS
MULTIPLE RTD HOOKUPS FOR
DIFFERENTIAL AND AVERAGED INPUTS
SE
NS
OR
#
1
SE
NS
OR
#
2
SE
NS
OR
#
3
SE
NS
OR
#
1
SE
NS
OR
#
2
SE
NS
OR
#
1
SE
NS
OR
#
2
NOTE:
IN DIFFERENTIAL MEASUREMENT APPLICATIONS, ALWAYS CONNECT
"HIGH" SENSOR TO TERMIANALS DESIGNATED HERE AS "SENSOR #1"
TERMINALS FOR 3PRG AND 4PRG UNITS
OR UNITS WITH DPDT RELAYS
Configuration data, stored in memory, is monitored
continuously. Changes can be made at any time. Any
changes made to operating parameters controlled by
choices made in the SPA menu system take effect im-
mediately.
The settings of the internal DIP switches and security
jumper may also be changed at any time. Changes to
the security jumper setting, however, do not take effect
until unit power is cycled off and on.
The settings for failsafe/non-failsafe and source/sink
(see Figures 3 and 4, respectively), once made, take
effect right away.
