Basler Electric DGC-2020 - Manual (Page 387)

SECTION 10
• CEM-2020 (CONTACT EXPANSION
MODULE)
General Information
The optional CEM-2020 is a remote auxiliary device that provides additional DGC-2020 contact inputs
and outputs. Two types of modules are available. A low current module (CEM-2020) provides 24 contact
outputs and a high current module (CEM-2020H) provides 18 contact outputs.
Features
CEM-2020s have the following features:
•
10 Contact Inputs
•
18 Contact Outputs (CEM-2020H) or 24 Contact Outputs (CEM-2020)
•
Functionality of Inputs and Outputs assigned by BESTlogicPlus programmable logic
•
Communications via CAN bus
Specifications
Operating Power
Nominal ...................................... 12 or 24 Vdc
Range ........................................ 8 to 32 Vdc (Withstands cranking ride-through down to 6 Vdc
for 500 ms)
Maximum Consumption
CEM-2020 ........................... 14 W
CEM-2020H ........................ 8 W
Contact Inputs
The CEM-2020 contains 10 programmable inputs that accept dry contacts.
Time from a CEM-2020 input application to:
Shutdown the generator via an alarm = 700 ms max
Close a relay on board the DGC-2020 = 300 ms max
Close a relay on board the CEM-2020 = 550 ms max
NOTES
A CEM-2020 contact input is true (on) if the input is connected to battery
ground with a resistance of less than 200 ohms.
The maximum length of wire that can be accommodated depends on the
resistance of the wire, and the resistance of the contacts of the device driving
the input at the far end of the wire.
The maximum wire length can be calculated as follows:
L
max
= (200
– R
device
)/(Resistance per Foot of Desired Wire)
Contact Outputs
Ratings
CEM-2020
Outputs 13 through 24 .. 1 Adc at 30 Vdc, Form C, gold contacts
Outputs 25 through 36 .. 4 Adc at 30 Vdc, Form C
CEM-2020H
Outputs 13 through 24 .. 2 Adc at 30 Vdc, Form C, gold contacts
Outputs 25 through 30 .. 10 Adc at 30 Vdc, Form C
9400200990 Rev X DGC-2020 CEM-2020 (Contact Expansion Module) 10-1