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Reference Manual
00809-0200-4728, Rev RA
Section 4: Electrical Installation
April 2015
Electrical Installation
Figure 4-3. Powering the Transmitter for Bench Configuration
Note
Signal loop may be grounded at any point or left ungrounded.
A Field Communicator may be connected at any termination point in the signal loop.
The signal loop must have between 250 and 1100 ohms load for communications.
Max torque is 6 in.-lbs (
0
/7 N-m).
Load limitation
The power required across the transmitter power terminals is 12 to 42.4 Vdc (the power
terminals are rated to 42.4 Vdc). To prevent damaging the transmitter, do not allow terminal
voltage to drop below 12.0 Vdc when changing the configuration parameters.
4.3.3 Ground the transmitter
Sensor shielding
The currents in the leads induced by electromagnetic interference can be reduced by shielding.
Shielding carries the current to ground and away from the leads and electronics. If the ends of
the shields are adequately grounded, only a small amount of current will actually enter the
transmitter. If the ends of the shield are left ungrounded, voltage is created between the shield
and the transmitter housing and also between the shield and earth at the element end. The
transmitter may not be able to compensate for this voltage, causing it to lose communication
and/or go into alarm. Instead of the shield carrying the currents away from the transmitter, the
currents will now flow through the sensor leads into the transmitter circuitry where it will
interfere with the circuit operation.
644 Head Mount and Field Mount 644 Rail Mount
A. Power supply
B. Field Communicator
B
250 ≤ R
L
≤ 1100
A
- Protocol 1
- Rosemount 644 3
- Temperature Transmitter 3
- Title Page 4
- Contents 5
- 6Section 6: Troubleshooting 8
- Reference Manual 10
- Table of Contents 10
- Section 1 Introduction 11
- 1.2 Overview 12
- 1.2.2 Transmitter overview 13
- 1.3 Considerations 14
- 1.4 Return of materials 15
- 1.5 Transmitter security 16
- Section 2 Configuration 17
- 2.3 System readiness 18
- 2.4 Configuration methods 19
- Configuring with an LOI 21
- 2.4.4 Failure mode 22
- 2.5 Verify configuration 23
- 2, 2, 8, 6 26
- 2.6.3 Setting output units 28
- Setting output units with LOI 29
- Communicator 30
- 2, 2, 3, 3 31
- Resetting Hot Backup 33
- 2.8 Configure device outputs 35
- 2.8.2 Damping 36
- 2, 2, 1, 5 2, 2, 1, 6 38
- Configuring tag with LOI 43
- 2.10.1 50/60 Hz filter 44
- 2.10.2 Resetting the device 44
- 2.11 Diagnostics and service 46
- 2, 2, 4, 3, 4 48
- AMS terms 49
- Configure min/max with LOI 50
- Special considerations 53
- Hot Backup 53
- 3.1 Overview 55
- 3.2 Safety messages 55
- 3.3 Considerations 56
- 3.4 Installation procedures 57
- 3.4.1 Set the alarm switch 58
- 3.4.2 Mount the transmitter 59
- 3.4.3 Install the device 60
- 4.1 Overview 67
- 4.2 Safety messages 67
- 4.3.1 Sensor connections 69
- 4.3.2 Power the transmitter 70
- 4.3.3 Ground the transmitter 71
- Shielding recommendations 72
- Option 2 73
- Option 3 73
- Grounded thermocouple inputs 74
- (HART/4–20 75
- Electrical Installation 76
- Figure 4-4. Load Limits 76
- 5.1 Overview 77
- 5.2 Safety messages 77
- 5.3 Calibration overview 78
- 5.4 Sensor input trim 79
- 3, 4, 4, 1 80
- 3, 4, 4, 2 81
- 5.5 Trim the analog output 82
- 3, 4, 5, 1 83
- 3, 4, 5, 2 83
- 5.7 Switching HART Revision 86
- Section 6 Troubleshooting 87
- 6.4 Diagnostic messages 90
- (SIS) Certification 93
- 7.4 Commissioning 94
- 7.5 Configuration 95
- 7.7.1 Proof test 96
- 7.7.2 Partial proof test 96
- 7.8 Specifications 98
- 7.8.3 Product life 99
- A.1 Specifications 101
- A.1.2 Physical 102
- OUNDATION 103
- A.1.3 Performance 104
- Sensor connections 105
- Communication requirements 106
- Power supply 107
- Temperature limits 107
- Turn-on time 108
- External transient protection 108
- Accuracy 108
- Accuracy example 110
- OUNDATION fieldbus 111
- 644H (DIN A Head Mount) 113
- 644 Field Mount 114
- 644 Rail Mount 114
- Sanitary Applications 117
- A.4 Ordering information 118
- 00809-0200-4728, Rev RA 123
- April 2015 123
- 2 NPT 00644-4438-0002 126
- 2 NPT 00644-4438-0102 126
- 2 NPT 00644-4438-0004 126
- 2 NPT 00644-4438-0104 126
- A.4.1 Configuration 127
- A.4.2 Tagging 127
- A.4.3 Considerations 127
- Custom configuration 128
- Head Mount 129
- A.5.2 Physical specifications 130
- Enclosure ratings (644H) 131
- Sanitary housing surface 131
- Load limitations 133
- Configuration 135
- ≤ Ta ≤ +85°C); Type 4X; 137
- 2-14 NPT) enclosure 137
- International 140
- Gas -40 °C ≤ Ta ≤ +65 °C 142
- Dust -40 °C ≤ Ta ≤ +85 °C 142
- T5 -40 °C ≤ Ta ≤ +70 °C 145
- T6 -60 °C ≤ Ta ≤ +40 °C 145
- T5 -60 °C ≤ Ta ≤ +85 °C 145
- Combinations 146
- Additional Certifications 147
- Product Certifications 149
- Sheet 2 of 2 158
- Trees and Fast Keys 165
- D.1 Number entry 173
- D.2 Text entry 174
- 175
- Canceling 176
- D.5 LOI menu tree 177
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