SIEMENS
SINAMICS S150 NEMA
Engineering Information
3
Siemens D21.7
(Part 2) – 2015
3/11
Digital and analog inputs and outputs
TM31 specifications
Digital inputs
• Voltage
-3 V + 30 V
• Low level (an open digital input is
interpreted as “low”)
-3 V to +5 V
• High level
15 V to 30 V
• Current consumption (at 24 V DC)
Typ. 10 mA
• Signal propagation delays for
digital inputs
L to H: approx. 50 µs
H to L: approx. 100 µs
• Max. wire size
#16 AWG (1.5 mm
2
)
Digital outputs (continuously short-circuit-proof)
• Voltage
24 V DC
• Max. load current per digital output
100 mA
• Max total current of digital outputs
400 mA
• Max. wire size
#16 AWG (1.5 mm
2
)
Analog inputs
(a switch is used to toggle between voltage and current input)
• As voltage input
- Voltage range
-10 V to +10 V
- Internal resistance
R
i
100 k
c
• As current input
4 mA to 20 mA/-20 mA to
- Current range
+20 mA/ 0 mA to 20 mA
- Internal resistance
R
i
250
c
- Resolution
11 bit + sign
• Max. wire size
#16 AWG (1.5 mm
2
)
Analog outputs (continuously short-circuit-proof)
• Voltage range
-10 V to +10 V
• Max. load current
-3 mA to +3 mA
• Current range
4 mA to 20 mA, -20 mA to
+20 mA, 0 mA to 20 mA
• Max. load resistance
500
c
for outputs in the range
-20 mA to +20 mA
• Resolution
11 bit + sign
• Max. wire size
#16 AWG (1.5 mm
2
)
Relay outputs (form C change-over contacts)
• Max. load current
8 A
• Max. switching voltage
250 V AC, 30 V DC
• Max. switching power (@ 250 V AC )
2000 VA (cos
j
= 1)
750 VA (cos
j
= 0.4)
• Max. switching power (at 30 V DC )
240 W (ohmic load)
• Required minimum current
100 mA
• Max. wire size
#14 AWG (2.5 mm
2
)
The TM31 Terminal Module contains:
• 8 digital inputs
• 4 bidirectional inputs/outputs
• 2 analog inputs (differential)
• 2 analog outputs
• 2 relay outputs (changeover)
• Input for KTY84 temperature sensor or PTC thermistor
• ±10V auxiliary voltage output for analog setpoint input
• ±24V auxiliary voltage output for digital inputs
TM31 Terminal Module