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--- wiki:01.battery_iq:01.btms:02.hardware:02.bm-ss [2025/04/08 11:21] – created goran.kocjancic
+++ wiki:01.battery_iq:01.btms:02.hardware:02.bm-ss [2025/04/16 10:29] (current) – ↷ Page moved and renamed from wiki:01.battery_iq:01.btms:02.hardware:02.bm-ss:start to wiki:01.battery_iq:01.btms:02.hardware:02.bm-ss goran.kocjancic
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 ====== BM-SS ======
+**BTMS String master**
+<WRAP column 450px>
+{{wiki:01_btms:media:00_hw:bm-ss.jpg?nolink&400|}}
+</WRAP>
+<WRAP column 300px>
+| Order code:  ^ BM-SS-A1          ^
+| Mounting:    | DIN rail, 85 mm   |
+| Dimensions:  | 85 × 120 × 39 mm  |
+</WRAP>
+<WRAP clear></WRAP>
+===== Highlights & Features =====
+  * Real-time monitoring of string voltage, charge-discharge current, charge-discharge state and string SOC.
+  * Monitor the voltage, impedance, temperature, SOC and SOH of each battery with BM-CS cell sensors and the specially designed isolated power bus.
+  * Advanced one-step auto-sensing for individual address. No more manual intervention and setup needed, reducing workload and setup errors.
+  * Advanced measurement algorithm, no need to discharge large current and measurement can be lossless.
+  * Balancing function: Keep voltage balanced during the floating charge process of battery pack, keeping the individual battery in the best state, extending backup time and life span of battery pack.
+  * Communication is based on power-isolated RS485. Secure and stable.
+  * Quickly locate the alarmed or faulty battery pack in machine room.
+  * External split-core Hall Sensor, measuring charge-discharge current in different ranges.
+  * Isolated voltage in communication interface: AC 3750V
+  * Supports up to 120 batteries (BM-CS)
+===== Technical specification =====
+|<600px 200px 100px>|
+^ Power supply           | Nominal                      | 24 VDC           |
+| :::                    | Range                        | 12 .. 36 VDC     |
+^ Power loss             | ≤ 2W                                           ||
+^ Operating temperature  | Standard                     | 0 .. 45 °C       |
+| :::                    | Limit                        | -10 .. 55 °C     |
+^ Storage temperature    | -40 .. 70 °C                                   ||
+^ Working humidity       | 5 .. 95 %RH, non-condensing                    ||
+^ Dimensions:            | Width                        | 85 mm            |
+| :::                    | Height                       | 105 mm           |
+| :::                    | Height max                   | 120 mm           |
+| :::                    | Depth                        | 39 mm            |
+^ Voltage measurements   | Range                        | 20 .. 800 VDC    |
+| :::                    | Accuracy                     | ± 0.5 %          |
+| :::                    | Resolution                   | 0.01 VDC         |
+^ Current measurements   | Range                        | -1000 .. 1000 A  |
+| :::                    | Accuracy                     | ± 2 %            |
+| :::                    | Resolution                   | 0.01 ADC         |
+**LED indicator**
+|<600px 200px>|
+^ Normal operation  | Green LED  |
+^ Alarm             | Red LED    |
+===== Wiring =====
+{{wiki:01_btms:media:00_hw:bm-ss_wiring.png?nolink|}}