Description
The CM series of controllers and coded magnetic switches
offers the most flexibility and widest range of options available.
The CM series is comprised of two basic technologies.
Controller Technologies
2-Wire Single Channel Controllers
The CM-S41 and CM-S21 controllers monitor the 2-wire
magnetically coded switches. The CM-S41 and CM-S21 controllers
use a patented technology which allows them to monitor the
2-wire or single channel switches up to Category 3. The ability to
monitor just a single channel enables the CM-S41 and CM-S21 to
easily monitor multiple switches and provide individual status of
each channel. Both of these controllers are compatible with the
CM-SE expansion module.
Dual Channel Controllers
The CM-S4 and CM-S30 controllers are designed to monitor
conventional read-style, magnetically-coded switches with 1 N/O
+ 1 N/C contacts. The CM-S4 controller can monitor up to four
switches to category 3. The CM-S4 controller offers status indication
for each individual switch. The CM-S30 controller can monitor
one switch to category 4, or two switches to category 3. The CMS30
control unit is capable of monitoring up to 30 conventional
read style switches in series, but does not conform to category 3
when used with more than two switches.
Switch Categories
The CM series of switches are all magnetically coded.
The CM series of switches fall into three main categories:
1. 2-wire Coded Magnetic
2. Conventional Read Style 1 N/C + 1 N/O contacts
3. Universal Read Style 2 N/C + 1 N/O contacts
The 2-wire Coded Magnetic Switches are only compatible with
the CM-S21, CM-S41 and CM-SE control units and expansion
module. The Conventional Read Style Switches are compatible
with the CM-S4 and CM-S30 controllers. The Universal Read
Style Switches are unique in design, all three contacts are rated
for safety. This means that Universal Read Style switches can
be used with the CM-S4 or CM-S30 Controllers, or conventional
safety monitoring relays such as the G9SA, SR103 or G9SX-AD,
-BC. This allows the Universal Read Style Switches to be run in
series with E-stop switches or other mechanical door switches.
Typically a category 2 rating would be applied to a system that
incorporates multiple switches wired in series to a standard safety
monitoring relay. A risk assessment should always be performed
by properly trained and authorized personnel.