Watlow 97 series - Page 21

Watlow Series 97 Wiring ■ 3.11
NOTE:
Successful installation
requires five steps:
• Choose the controller’s
hardware configuration
and model number
(Appendix);
• Choose a sensor
(Chapters 3 and 6, and
Appendix);
• Install the controller
(Chapter 2);
• Wire the controller
(Chapter 3) and
• Configure the controller
(Chapters 4, 5 and 6).
ç
WARNING:
To avoid damage to
property and equipment,
and/or injury of loss of
life, use National Electric
Code (NEC) standard
wiring practices to
install and operate the
Series 97. Failure to do
so could result in such
damage, and/or injury or
death.
Figure 3.11a — EIA-232 to EIA-485 Conversion
B&B Converter (B&B Electronics Manufacturing Company, (815) 433-5100).
CMC Converter (CMC Connecticut Micro-Computer, Inc., 800-426-2872).
NOTE:
The CMC converter requires an external power supply when used with a laptop computer.
Figure 3.11b — Termination for EIA-232 to EIA-485 Converter
+5V
B
A
GND
T+/R+
T-/R-
Com
1KΩ
120Ω
1KΩ
Converter box
termination
with pull-up
and pull-down
resistors.
9VÎ (dc) (see note)
120VÅ (ac)
COM.
T+/R+
T-/R-
0219-0217-0000
7 ft. comms cable
EIA-232
ADA485L
EIA-485
A
B
A
B
G
9VÎ
G
DI/ODI/O
19
21
20
T-/R-
TD (A)
TD (B)
RD (A)
RD (B)
GND
TD (A)
TD (A)
T+/R+
120V~ (ac)
EIA-232 EIA-485
EIA-485
Power Supply
AD-1210
+
–
GND
+12V
COM.
19
21
20

485OIC