ABB CM30 User Manual

ControlMaster CM30 and CM50
Universal process controllers,
1
/4 and
1
/2 DIN 8 Templates and Functionality
IM/CM/ED–EN Rev. B 67
The auto-manual station and analog backup station templates can be used in series or in parallel with the master output
signal. Parallel operation is achieved by using an external relay that is triggered by a relay on the ControlMaster, and selects
the output to be routed to the process. This setup allows uninterrupted control, even in the event of failure of either the
master controller or ControlMaster.
8.2.3 Single Indicator
The Single Indicator template is used to display one process variable on the digital display.
8.2.4 Dual Indicator
The Dual Indicator template is used to display two process variables on the digital display.
*External relay type is triple-pole, dual-throw.
Fig. 8.1 Parallel Connection

+
AIN 2 –
AO 1 +
PV
Control
Output
Master
Controller
AO 1 –
NC
NC
NC
AIN 2 +
Output
RLY1
AIN 1
External Relay*
AO1
Manual Output
AIN 1
PV
Manual Output AO1
Manual Output
AO2
AIN 1
AIN 2
PV 1
PV 2

ABB CM30 Specifications

General

Product Name	CM30
Product Type	Controller
Manufacturer	ABB
Frequency	50 / 60 Hz
Protection Class	IP20
Mounting	DIN Rail
Operating Temperature	-25°C to +60°C