Operating Instructions

Chapter 6 - Technical Information
Fieldbus Technical Data
183 | 187
Siemens Industry, Inc.
Siemens BT300 HVAC Drive
DPD01809
Smart Infrastructure
2019-05-29
Terminal
Signal/Description
Specification
17
Common for DI 1 - DI 6
18
Analog Output 1 Signal (+)
0 through 10 Vdc or 0 through 20 mA (selection with
DIP switch)
Resolution: 0.1%, Accuracy: ±1%
19
Analog Output 1 Common (-)
30
24 Vdc Input Voltage
±10%; Maximum 250 mA; Used for power backup of
control unit.
A
RS-485 -
Fieldbus Negative
B
RS-485 +
Fieldbus Positive
Slot B
21
Relay Output 1 Normally Closed
Switching capacity: 24 Vdc/8A; 250 Vac/8A;
125 Vdc/0.4A
Minimum switch load: 5 Vdc/0 mA
22
Relay Output 1 Common
23
Relay Output 1 Normally Open
24
Relay Output 2 Normally Closed
Switching capacity: 24 Vdc/8A; 250 Vac/8A;
125 Vdc/0.4A
Minimum switch load: 5 Vdc/0 mA
25
Relay Output 2 Common
25
Relay Output 2 Normally Open
32
Relay Output 2 Common
Switching capacity: 24 Vdc/8A; 250 Vac/8A;
125 Vdc/0.4A
Minimum switch load: 5 Vdc/0 mA
33
Relay Output 2 Normally Open
Fieldbus Technical Data
APOGEE P1
BACnet MS/TP
Modbus RTU
Metasys N2
BACnet IP
Modbus TCP
Interface
RS-485
100BaseT, 802.3
Data Transfer
Method
RS-485, half-duplex
Ethernet half/full duplex
Transfer Cable
STP (Shielded Twisted Pair), Belden 9841 type or similar
CAT5e STP
Connector
14 AWG (2.5 mm
2
)
Shielded RJ45
Baud Rate(s)
4800, 9600
9600, 19200, 38400,
76800
300, 600, 1200,
2400, 4800, 9600,
19200, 38400,
57600, 76800,
115200, 230400
9600
10/100 Mbits/s, auto-sensing
Addresses
0 to 127
0 to 127
1 to 247
1 to 255
NA