Specifications

Publication 1794-SG002D-EN-P - May 2012
Select FLEX Ex I/O Communication Adapters and Distribution Method 85
When combining 1794 FLEX I/O and 1797 FLEX Ex I/O, the 1794 FLEX I/O
modules are placed to the left of the 1797-BIC and -CEC modules while the
1797 FLEX Ex I/O modules are placed on the right.
IMPORTANT
A FLEX Ex power supply (1797-PSxxx) must be used to power
the 1797 FLEX Ex I/O regardless of where they are located.
FlexBus
Bus
PWR
limit
1797-CEC
1797-BIC
FlexBus FlexBus
Bus
+V
-V
Power
supply
Attribute 1797-BIC
I/O module capacity 8
(1)
Isolation voltage System to System and System Slave Side to Power
Supply: Galvanic to DIN EN 50020
Power consumption, max 0.15 A @ 18…32V DC
Power source failure, max input U
m
= 253V AC
Noxious gas exposure Tested to severity level G3, ISA-S71.04-1985
Power dissipation 2.1 W
Thermal dissipation 7.2 BTU/hr
Dimensions
HxWxD
87 x 94 x 75 mm
3.4 x 3.7 x 2.95 in.
Weight, approx. 0.2 kg (0.44 lbs)
(1) 8 FLEX Ex modules. Note that a total of eight I/O modules can be attached to a 1794 FLEX I/O adapter. The
1797-BIC and 1797-CEC are not included in this number. In intermixed systems, the number of
1797 FLEX Ex I/O modules (attached onto the 1797-BIC) plus the number of 1794 FLEX I/O modules
(connected between the adapter and the 1797-CEC) cannot exceed eight.