Watlow MLS - Manual (Page 20)

8 MLS User’s Guide
Introduction
RTD Ranges
Miscellaneous Specifications
Analog Outputs
Digital Inputs
RTD1 -148.0 to 572 ° F (-100.0 to 300.0 ° C) 0.1 ° C
RTD2 -184 to 1544 ° F (-120 to 840 ° C) 1.0 ° C
RTD3 -94 to 572 ° F (-70 to 300 ° C) 1.0 ° C
T/C break detection Pulse type for upscale break detection and
thermocouple alarm display.
Milliamp inputs 0-10 mA, 0-20 mA (4-20 mA), etc., with scal-
ing resistors.
Infrared inputs power supply included, with scaling resistors
for IRSM.
Source impedance Measurements are within specification with
up to 500 ohms source resistance.
The Watlow-Anafaze Digital to Analog Converter (DAC) is an optional
module for MLS and CLS controllers. It lets you convert a distributed zero
crossing output signal to an analog process control signal. You can purchase
4-20 mAdc, 0-5 Vdc, and 0-10 Vdc versions of the DAC.
Watlow-Anafaze also offers the Serial DAC for precision open-loop con-
trol. 0-5 Vdc / 4-20 mAdc jumper selectable. Contact Watlow-Anafaze for
more information about the DAC and Serial DAC.
Number 8
Input voltage protection Diodes to supply and common
Absolute maximum input
current
+10 mA
Voltage levels <1.3V=Low; >3.7V=High
Maximum input current 1.2 mA from MLS with input at zero volts
Maximum switch resis-
tance to pull input low
1 Kohm
Minimum switch off resis-
tance
11 Kohm