No tools needed for one-handed wiring using push-in terminals
Actuation of the spring NC contacts with a standard screwdriver, with a blade width up to 3.5 mm
Outstanding access due to arrangement of measuring tap, spring NC contacts and cable entry in columns, while at the same time reducing the space required by 64%
Fault-proof color coding of the spring NC contacts for better orientation in the terminal panel
Replacement of I/O modules during operation without affecting the wiring
Operation with module gaps (gaps without I/O module)
Automatic coding of the I/O modules prevents destruction of the electronics if a module is accidentally inserted in the wrong slot during replacement
High EMC interference immunity:
- self-assembling shielded backplane bus
- multi-layer conductor plate with shield levels for interference-free signal transmission from the terminal to the I/O module
- system-integrated, space-saving shield connection for quick installation
Self-assembling potential groups without external wiring or jumpers
Replaceable terminal box
Side-by-side latching of the BUs for high mechanical and EMC loads
Optional module-specific color identification of the terminals according to the color code CC
Optional equipment marking using slide-in equipment labeling plates

An ET 200SP station can be expanded via one ‘BU-Send’ BaseUnit with a “BA-Send” BusAdapter plugged onto it with up to 16 modules from the ET 200AL series of I/O devices with IP67 protection.

Siemens BaseUnit ET 200SP Product Specifications:

Article number	6ES7193-6BP20-0BB0	6ES7193-6BP20-0BB1	6ES7193-6BP20-0DC0	6ES7193-6BP20-0BC1	6ES7193-6BP00-0BD0	6ES7193-6BP20-0BF0
	BaseUnit Type B0, BU20-P12+A4+0B	BaseUnit Type B1, BU20-P12+A0+4B, PU 1	BaseUnit Type C0, BU20-P6+A2+4D	BaseUnit Type C1, BU20-P6+A2+4B	BaseUnit Type D0, BU20-P12+A0+0B	BaseUnit Type F0, BU20-P8+A4+0B
General information
Product type designation	BU type B0	BU type B1	BU type C0	BU type C1	BU type D0	BU type F0
HW functional status	FS10 and higher	FS10 and higher	FS10 and higher	FS10 and higher	FS10 and higher	FS10 and higher
Supply voltage
Rated value (DC)	See manual	See manual	See manual	See manual	See manual	See manual
● For P1 and P2 bus	24 V	24 V	24 V	24 V	120 V
● For AUX bus	24 V; Equal potential group to P1/P2 bus or PE	24 V; Equal potential group to P1/P2 bus or PE	24 V; Equal potential group to P1/P2 bus or PE	24 V; Equal potential group to P1/P2 bus or PE	120 V; Equal potential group to P1/P2 bus or PE
● for process terminals	24 V	24 V	24 V	24 V
Rated value (AC)	See manual	See manual	See manual	See manual	See manual	See manual
● For P1 and P2 bus	230 V	230 V	230 V	230 V	277 V
● For AUX bus	230 V; Equal potential group to P1/P2 bus or PE	230 V; Equal potential group to P1/P2 bus or PE	230 V; Equal potential group to P1/P2 bus or PE	230 V; Equal potential group to P1/P2 bus or PE	277 V; Equal potential group to P1/P2 bus or PE
● for process terminals	230 V	230 V	230 V	230 V	277 V; 480 V (L1 – L2 – L3); 277 V (L, N)
external protection for power supply lines		Yes	Yes; 10 A miniature circuit breaker with type B or C tripping characteristic for the respective rated supply voltage
Mains filter
● integrated	No	No	No	No	Yes; Between N and FE	No
Current carrying capacity
up to 60 °C, max.	10 A	10 A	10 A	10 A	5 A	10 A
For P1 and P2 bus, max.	10 A	10 A	10 A	10 A	10 A	10 A
For AUX bus, max.	10 A	10 A	10 A	10 A	10 A	10 A
For process terminals, max.	5 A	5 A	5 A; 10 A for process terminals 5 and 6	5 A; 10 A for process terminals 5 and 6	5 A	5 A
Hardware configuration
Automatic encoding	Yes	Yes	Yes	Yes	Yes	Yes
Formation of potential groups
● New potential group					No
● Potential group continued from the left					Yes
Slots
● Number of slots	1	1	1	1; Type C1	1; Type D0	1; Type F0
Potential separation
between backplane bus and supply voltage	Yes	Yes	Yes	Yes	Yes	Yes
between process terminals and supply voltage	Yes	Yes; Not applicable for process terminals 9 to 12	Yes	Yes		Yes
between power bus and supply voltage	No	Yes	No	No	Yes	Yes
Isolation
Isolation tested with	3 100 V DC	3 100 V DC	3 100 V DC	3 100 V DC	3 100 V DC	3 100 V DC
Ambient conditions
Ambient temperature during operation
● horizontal installation, min.	-30 °C	-30 °C	-30 °C	-30 °C	-30 °C	-30 °C
● horizontal installation, max.	60 °C	60 °C	60 °C	60 °C	60 °C	60 °C
● vertical installation, min.	-30 °C	-30 °C	-30 °C	-30 °C	-30 °C	-30 °C
● vertical installation, max.	50 °C	50 °C	50 °C	50 °C	50 °C	50 °C
Altitude during operation relating to sea level
● Installation altitude above sea level, max.	2 000 m; On request: Installation altitudes greater than 2 000 m	2 000 m; On request: Installation altitudes greater than 2 000 m	2 000 m; On request: Installation altitudes greater than 2 000 m	2 000 m; On request: Installation altitudes greater than 2 000 m	2 000 m; On request: Installation altitudes greater than 2 000 m	2 000 m; On request: Installation altitudes greater than 2 000 m
Accessories
Color coding labels
● for process terminals			CC51, CC52	CC51	does not exist
● for AUX terminals	CC81 to CC83		CC84 to CC86	CC84 to CC86	does not exist
● for add-on terminals			does not exist	does not exist	does not exist
connection method / header
Terminals
● Terminal type	Push-in terminal	Push-in terminal	Push-in terminal	Push-in terminal	Push-in terminal
● Conductor cross-section, min.	0.14 mm²; AWG 26	0.14 mm²; AWG 26	0.14 mm²; AWG 26	0.14 mm²; AWG 26	0.14 mm²; AWG 26
● Conductor cross-section, max.	2.5 mm²; AWG 14	2.5 mm²; AWG 14	2.5 mm²; AWG 14	2.5 mm²; AWG 14	2.5 mm²; AWG 14
● Number of process terminals to I/O module	12; Pro slot	12; Pro slot	12; Pro slot	16; Pro slot	12; Pro slot
● Number of terminals to AUX bus	0	0	0	0	0
● Number of add-on terminals	0	0	0	0	0
● Number of terminals with connection to P1 and P2 bus	0; Pro slot	0; Pro slot	0; Pro slot	2; Pro slot	0; Pro slot
Dimensions
Width	20 mm	20 mm	20 mm	20 mm	20 mm	20 mm
Height	117 mm	117 mm	117 mm	117 mm	117 mm	117 mm
Depth	35 mm	35 mm	35 mm	35 mm	35 mm	35 mm
Weights
Weight, approx.	48 g	48 g	47 g	47 g	47 g	48 g