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	6ES7193-6BP20-0DA0	6ES7193-6BP00-0DA0	6ES7193-6BP20-0BA0	6ES7193-6BP00-0BA0
	BaseUnit Type A0, BU15-P16+A10+2D	BaseUnit Type A0, BU15-P16+A0+2D	BaseUnit Type A0, BU15-P16+A10+2B	BaseUnit Type A0, BU15-P16+A0+2B
General information
Product type designation	BU type A0	BU type A0	BU type A0	BU type A0
HW functional status	From FS07	From FS06	From FS06	From FS06
Supply voltage
Rated value (DC)	24 V	24 V	24 V	24 V
external protection for power supply lines	Yes; 24 V DC/10 A miniature circuit breaker with type B or C tripping characteristic	Yes; 24 V DC/10 A miniature circuit breaker with type B or C tripping characteristic	Yes; 24 V DC/10 A miniature circuit breaker with type B or C tripping characteristic	Yes; 24 V DC/10 A miniature circuit breaker with type B or C tripping characteristic
Mains filter
● integrated		Yes		No
Current carrying capacity
For P1 and P2 bus, max.	10 A	10 A	10 A	10 A
For AUX bus, max.	10 A		10 A
For process terminals, max.	2 A	2 A	2 A	2 A
Hardware configuration
Automatic encoding				Yes
Formation of potential groups
● New potential group	Yes	Yes	No	No
● Potential group continued from the left	No	No	Yes	Yes
Slots
● Number of slots	1; Type A0	1; Type A0	1; Type A0	1; Type A0
Potential separation
between the potential groups	Yes	Yes
Isolation
Isolation tested with	707 V DC (type test)	707 V DC (type test)	707 V DC (type test)	707 V DC (type test)
Ambient conditions
Ambient temperature during operation
● horizontal installation, min.	-30 °C	-30 °C	-30 °C	-30 °C
● horizontal installation, max.	60 °C	60 °C	60 °C	60 °C
● vertical installation, min.	-30 °C	-30 °C	-30 °C	-30 °C
● vertical installation, max.	50 °C	50 °C	50 °C	50 °C
Altitude during operation relating to sea level
● Installation altitude above sea level, max.	5 000 m; Restrictions for installation altitudes > 2 000 m, see manual	5 000 m; Restrictions for installation altitudes > 2 000 m, see manual	5 000 m; Restrictions for installation altitudes > 2 000 m, see manual	5 000 m; Restrictions for installation altitudes > 2 000 m, see manual
Accessories
Color coding labels
● for process terminals	CC00 to CC09	CC00 to CC09	CC00 to CC09	CC00 to CC09
● for AUX terminals	CC71 to CC73	does not exist	CC71 to CC73	does not exist
● for add-on terminals	does not exist	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
● Conductor cross-section, min.	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
● Number of process terminals to I/O module	16	16	16	16; Pro slot
● Number of terminals to AUX bus	10	0	10	0
● Number of add-on terminals	0	0	0	0
● Number of terminals with connection to P1 and P2 bus	2	2	2	2; Pro slot
Dimensions
Width	15 mm	15 mm	15 mm	15 mm
Height	141 mm	117 mm	141 mm	117 mm
Depth	35 mm	35 mm	35 mm	35 mm
Weights
Weight, approx.	50 g	40 g	50 g	40 g