Critical Error Signal - Seeley Climate Wizard CW-80 Installation & Operation Manual

BUILDING MANAGEMENT SYSTEMS
(BMS) Cont.
Interface Description
On Digital DC input
4 - 32VDC for on on = cooler run
condition
off = cooler off
Indirect Cool Digital DC input
4 - 32VDC for On = indirect cooling on (can
indirect cool be used with or without direct
condition
cooling)
Off = indirect cooling off
Supply fan speed Analogue DC input
0 - 10V DC 0v = lowest supply fan speed
10V = highest supply fan
speed
Direct Cool* Digital DC input
24VDC for direct
On = direct cooling on (can be
cool condition
used with or without indirect
cooling)
Off = direct cooling off
Critical error Transistor digital DC switch
signal on (conducting)= critical error
2 - 32V DC range
off (open circuit) =
0.5A Max. no critical error
Warning error Volt free relay contacts
signal relay energized = warning
240VAC/DC Max error
5A Max. relay de-energized = no
warning error
* Direct cool only available in CW-80S Supercool models.

Critical Error Signal

This error signal comprises of a single pole voltage free
transistor that conducts under fault conditions.
The transistor is rated at 500mA and 32 volts DC max.
In order to use this signal an external voltage must be
supplied that will then drive for example a relay coil or
indicator lamp that does not exceed the above ratings.
+ve
ERROR +
MAX 32V DC
-ve
22 | CW-80 Container Cooler 866600CE-B
Comment
Fully isolated.
Polarity
sensitive.
Fully isolated
Polarity
sensitive
Common
ground.
Polarity
sensitive.
Fully isolated
Fully isolated.
Power source
not included
Polarity
sensitive.
Fully isolated.
Normally closed
contact also
Available.
TERMINALS IN
CONTROL PANEL
MAX 500mA
ERROR 0V
ILL1680-A
R R