Watlow CLS200 - Manual (Page 44)

Chapter 2: Installation CLS200 Series User’s Guide
28 Watlow Anafaze Doc.# 0600-3050-2000
Testing Your System
This section explains how to test the controller after instal-
lation and prior to making field wiring connections.
TB50 or TB18 Test
Use this procedure to verify that the TB50 or TB18 is prop-
erly connected and supplied with power:
1. Turn on power to the CLS200. The display should read
CALCULATING CHECKSUM then show the bar graph
display. (See Figure 3.3.) If you do not see these dis-
plays, disconnect power and check wiring and power
supply output.
2. Measure the +5V Î (dc) supply at the TB50 or TB18:
a) Connect the voltmeter’s common lead to TB50 or
TB18 terminal 3 or TB18 terminal 2.
b) Connect the voltmeter’s positive lead to TB50 or
TB18 screw terminal 1. The voltage should be
+4.75 to +5.25V
Î (dc).
Digital Output Test
Use this procedure to test the controller’s outputs before
loads are connected. If using it at another time for trouble-
shooting, disconnect loads from outputs before testing.
1. Connect a 500 Ω to 100 k Ω resistor between TB50 or
TB18 screw terminal 1 and a digital output terminal.
(See Table 2.5, TB18 Connections on page 40; Table
2.6, TB50 Connections for CLS204 and CLS208 on
page 41; or Table 2.7, TB50 Connections for CLS216 on
page 42.)
2. Connect the voltmeter’s positive lead to screw terminal 1.
3. Connect the common lead to the digital output terminal.
4. Use the digital output test in the MANUAL I/O TEST
menu to turn the digital output on and off.
(See Test
Digital Output on page 104 and Digital Output Num-
ber on page 104.) When the output is ON, the output
voltage should be less than 1V. When the output is
OFF, the output voltage should be between 4.75 and
5.25V.
NOTE! By default, heat outputs are enabled. Only
disabled outputs may be turned on using the
manual I/O test. To test heat outputs, set the
corresponding loop to manual mode 100%
output. See Selecting the Control Status on
page 61.