Watlow 12LS Controller - Manual (Page 27)

3-13
WARNING
Use of the grounded T/C, meaning that the T/C junction is at the same potential of the metal protection sheath of the
T/C assembly, may cause calibration shifts and/or erratic temperature readings of the input. The use of a grounded T/C
in a process using electrical energy for heating, may also cause damage to the 12LS.
The ungrounded T/C, meaning that the T/C junction is electrically isolated from the metal sheath of the T/C assembly
is recommended by ANAFAZE for use as the type of T/C to be use with the 12LS.
When updating an existing temperature control system with the ANAFAZE 12LS, it is highly recommended that all
grounded T/C in use with the old system be changed to ungrounded types of T/C.
3.3.9RTD INPUTS
RTD's should have external signal conditioning with an isolated 4-20ma output or the equivalent for connection to the
12LS. Please consult ANAFAZE for additional information.
3.3.10 INFRARED NON-CONTACT TEMPERATURE SENSORS
The ANAFAZE IRSM (infrared sensing module) is ideally suited for many infrared non-contact temperature
applications. It can be supplied by ANAFAZE as a fully integrated system with the 12LS configured to provide
power for up to four IRSM modules and for direct connection of the IRSM output. The following connections are
required if the IRSM internal ambient sensor is not used:
+--------------------------------------------------------------+
¦ TABLE 3-2. IRSM CONNECTIONS ¦
+--------------------------------------------------------------¦
¦ 12LS ¦ IRSM Wires ¦
¦ TB1 +------------------------------------------------¦
¦ TERMINALS ¦ Pin Nr. ¦ Color ¦ Function ¦
+-------------¦----------¦---------¦---------------------------¦
¦ CH # +IN ¦ A ¦ Orange ¦ Signal Out (0-10 madc) ¦
¦ -IN COM ¦ B ¦ White ¦ Signal Ground ¦
¦ -IN COM ¦ K ¦ ¦ Shield ¦
¦ +5VDC ¦ E ¦ Red ¦ +5 VDC Supply ¦
¦ CTRL COM ¦ C ¦ Black ¦ Power Ground ¦
¦ CTRL COM ¦ J ¦ Brown ¦ No Peak Hold ¦
¦ N/C ¦ D ¦ Green ¦ +15 VDC Supply ¦
¦ N/C ¦ F ¦ Blue ¦ Ambient Sensor ¦
¦ N/C ¦ H ¦ Yellow ¦ Track and Hold ¦
+--------------------------------------------------------------+
The range of the standard ANAFAZE IRSM is 0-1000o F with an output of 0-10mAdc. The input of the ANAFAZE
12LS must be configured for a 0-10madc input. See section 3.3.7
To use more than four IRSM's with the 12LS, use an external power supply of 8-15vdc.